JP2009134536A - Information processor, clock signal control method for information processor, and clock signal control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly control a clock to increase processing speed, without increasing an electric power consumption, in data acquisition and retrieval. <P>SOLUTION: A RAM 110 stores result information (a retrieval condition, the number of retrieved results, and an acquisition time (time required for acquiring the data)) obtained as a result of the past data acquisition retrieval, as table information. Whether the data acquisition retrieval to be executed based on the retrieval condition becomes a bottleneck or not is determined based on the current retrieval condition , and the table information of the RAM 110 referred according to the retrieval condition. A clock signal generation part 140 is controlled by a CPU 130, to control one or both of a clock signal used in the CPU 130 and a clock signal for accessing a memory such as the RAM 110. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a device such as a mobile phone terminal or a personal digital assistant called PDA (Personal Digital Assistants), and a method and program used for controlling a clock signal in the device.

  Some so-called hard disk platforms, which are the basis of various portable information processing apparatuses, can be clock-controlled in order to reduce power consumption. In the case of a mobile phone, for example, a CPU (Central Processing Unit) core called “OMAP (Open Multimedia Application Platform)” provided by Texas Instruments of the United States and a chip set called “SH-Mobile G2” provided by Renesas Technology In the above, the CPU and memory bus clock control can be executed by performing specific settings.

  In addition, in a PC (Personal Computer) or server, there is a mechanism in which the platform automatically controls the clock by monitoring the CPU load and the operating program by software such as a profiler and a task manager.

  However, so-called mobile devices such as mobile phones have problems of so-called resources such as functions, performance, and capacity of hardware resources provided in the mobile devices. When using a special hardware platform as described above, a PC, etc. It is difficult to realize clock control as a function of the hardware platform unless there is a sufficient resource.

  For this reason, in mobile devices, applications that require clock control often perform clock control processing during the operation sequence. For example, Patent Document 1 described later states that “system clock control is incorporated into the camera operation sequence and the clock frequency is switched according to the processing content of the system regardless of the state of the battery voltage, thereby reducing power consumption and using the battery. A technique of "improvement in efficiency" is disclosed.

The above-mentioned Patent Document 1 is as follows.
JP 2003-60964 A

  By the way, in the case of the technique described in Patent Document 1 described above, the processing amount of a certain processing block is constant, and a trade-off between the processing amount in the processing block and the power source resource (power source resource) can be predicted. Can achieve reduction of power consumption and improvement of battery usage efficiency, and there is no problem. In other words, when the amount of data processing in the processing block is constant and the power consumption when using clock signals of different frequencies can be accurately grasped, clock control in the processing block (control of the frequency of the clock signal) Can be performed appropriately.

  However, in the case of a mobile device such as a mobile phone, there are still cases in which a plurality of data that dynamically increase / decrease are processed, and the processing time for each data also varies greatly. For example, in a camera function mounted on a mobile phone, a normal mode of VGA (Video Graphics Array) standard (resolution of 640 × 480 pixels) and a high image quality mode of SVGA (Super VGA) standard (resolution is 800 × 600). Pixel mode), the amount of data differs greatly between the case of shooting in the normal mode and the case of shooting in the high image quality mode, and the processing time also changes.

  Also, when searching for and acquiring target data from the database, the number of data to be acquired differs depending on the search condition, and the processing time for the search / acquisition processing also differs. In this way, the processing is basically the same, but the amount of data to be processed and the number of data obtained as a result of processing differ depending on the processing mode and processing conditions used, resulting in differences in processing time. There are also many.

  In this case, in order to perform clock control without being affected by the amount of data to be processed, it is conceivable to perform clock control in fine units. However, if the clock control itself is continuously performed in fine units, the processing amount for clock control becomes a processing amount that cannot be overlooked. Not recommended.

  In view of the above, since the number of data to be acquired and the processing time are different, the present invention appropriately performs a clock without increasing power consumption in a process for acquiring and retrieving data that is difficult to control appropriately. The purpose is to realize high speed processing by performing control.

In order to solve the above problem, an information processing apparatus according to claim 1 is provided.
Processing means for obtaining the target data from the database based on the search condition;
Memory means for storing and holding target data acquired by the processing means;
Obtaining means for obtaining result information obtained by performing processing for obtaining data in accordance with the search condition in the processing means;
Table storage means for storing and holding table information in which the search condition is associated with the result information acquired through the acquisition means;
Processing clock signal generating means for generating a clock signal used in the processing means;
Memory clock signal generating means for generating a clock signal for accessing the memory means;
In the case of executing a process of acquiring data in the processing means based on a search condition newly designated, the table information of the table storage means referred to based on the search condition and the search condition The clock for controlling to increase the frequency of the clock signal to be generated by controlling one or both of the processing clock signal generating means and the memory clock signal generating means when it is determined that it is necessary And a signal control means.

  According to the information processing apparatus of the first aspect of the present invention, processing for acquiring data is executed by the processing means in accordance with the search condition specified, and the target data obtained as a result is stored in the memory means. Is remembered. At this time, result information obtained as a result of processing by the processing means is acquired by the acquisition means. The search condition and the acquired result information are associated with each other and stored as table information in the table storage unit.

  And when performing the process which acquires data through a process means according to the search condition newly designated, the search condition newly designated and the table referred according to the search condition Based on the table information of the storage means, one or both of the processing clock signal generation means and the memory clock signal generation means are controlled by the clock signal control means, and the clock signal used in the processing means and the access to the memory means are controlled. One or both of the clock signals (clock signals used when data is exchanged between the processing means and the memory means) is controlled.

  Thereby, based on the search condition and the table information of the table storage means referred to in accordance with the search condition, it is determined whether the data acquisition process to be executed this time is a bottleneck for speeding up the process. When the bottleneck is a bottleneck, the frequency of one or both of the clock signal used by the processing means and the clock signal for accessing the memory means is increased (clocked up) to speed up the processing. In addition, it is possible to prevent unnecessary power consumption by clocking up only at the bottleneck portion.

An information processing apparatus according to a second aspect of the present invention is the information processing apparatus according to the first aspect,
The result information includes a result number that is the number of data items acquired by the processing unit according to the search condition and an acquisition time that is a time taken for the data acquisition process according to the search condition in the processing unit. Yes,
The acquisition unit includes a measurement unit that measures the acquisition time.

  According to the information processing apparatus of the second aspect of the present invention, the acquisition unit includes a measurement unit that measures an acquisition time, which is a processing time required for a process of acquiring data performed through the processing unit, and the acquisition unit includes: The result number and the acquisition time, which are the number of data acquired by the process of acquiring data by the processing means, can be acquired as result information.

  As a result, table information in which the search condition, the number of results, and the acquisition time are associated is stored and held in the table storage means, and the clock used by the processing means is also used using these pieces of information. It is possible to appropriately determine whether it is necessary to increase the frequency of one or both of the signal and the clock signal for accessing the memory means.

An information processing apparatus according to a third aspect of the present invention is the information processing apparatus according to the second aspect,
In the clock signal control means, the search condition involves an operation, the number of results of the corresponding table information in the table storage means referred to based on the search condition is small, and the acquisition time of the table information is If there are many, the processing clock signal generation means is controlled so as to increase the frequency of the clock signal used in the processing means.

  According to the information processing apparatus of the invention described in claim 3, the search condition includes a condition for performing an operation, the number of results of the table information in the table storage means referred to based on the search condition is small, and the When the acquisition time of the table information is long, it is determined that the data acquisition processing according to the new search condition takes time for processing in the processing means, and the frequency of only the clock signal used in the processing means is increased. Control (to make it up).

  As a result, the case where processing in the processing means takes time is appropriately identified as a bottleneck part, and only in this case, the processing in the processing means is effectively speeded up and the entire data acquisition process is accelerated. Can be realized. Further, since the frequency of the clock signal is not increased when unnecessary, the power consumption is not increased.

An information processing apparatus according to a fourth aspect of the present invention is the information processing apparatus according to the second aspect,
In the clock signal control means, the search condition is accompanied by an operation, the number of results of the corresponding table information in the table storage means referred to based on the search condition is large, and the acquisition time of the table information is also In many cases, the processing clock signal generating means and the memory clock signal generating means are controlled so that the frequency of both the clock signal used in the processing means and the clock signal for accessing the memory means is set. It is characterized by being controlled to be high.

  According to the information processing apparatus according to claim 4, the search condition includes a condition for performing an operation, the table information stored in the table storage unit referred to based on the search condition has a large number of results, and the table information When the acquisition time is long, the data acquisition process according to the new search condition is used by the processing unit by determining that the processing in the processing unit and the data recording process in the memory unit take time. Control is performed to increase the frequency of both the clock signal and the clock signal for accessing the memory means.

  As a result, a case where it takes time for processing in the processing means and data recording processing in the memory means is appropriately identified as a bottleneck, and only in this case, processing in the processing means Both the data recording process to the memory means can be effectively speeded up, and the overall data acquisition process can be speeded up. Further, since the frequency of the clock signal is not increased when unnecessary, the power consumption is not increased.

An information processing apparatus according to claim 5 is the information processing apparatus according to claim 2,
The clock signal control means is such that the search condition does not involve an operation, the number of corresponding table information in the table storage means referred to based on the search condition is large, and the acquisition time of the table information If the frequency is too high, the memory clock signal generation means is controlled so as to increase the frequency of the clock signal for accessing the memory means.

  According to the information processing apparatus according to claim 5, the search condition does not include a condition for performing an operation, the number of results of the table information in the table storage means referred to based on the search condition is large, and the table If the information acquisition time is long, it is determined that the data acquisition process according to the new search condition takes a long time to record the data in the memory means, and only the clock signal for accessing the memory means is used. To control.

  As a result, the case where data recording processing to the memory means takes time is appropriately identified as a bottleneck part, and only when this is specified, the data recording processing to the memory means is effectively accelerated. As a result, the overall speed of the data acquisition process can be increased. Further, since the frequency of the clock signal is not increased when unnecessary, the power consumption is not increased.

  According to the present invention, since the number of data to be acquired and the processing time are different for each process, it is difficult to perform appropriate clock control. The clock control can be performed to increase the processing speed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment described below, a case where the present invention is applied to a mobile phone terminal will be described as an example.

[Configuration of cellular phone terminal of embodiment]
First, the configuration of the mobile phone terminal according to this embodiment will be described. FIG. 1 is a block diagram for explaining a configuration example of a mobile phone terminal to which an embodiment of the present invention is applied. As shown in FIG. 1, the mobile phone terminal of this embodiment includes a control line (control bus) 101 used for transmission of control signals, and a data line (data bus) 102 used for transmission of various data. Is provided.

  As shown in FIG. 1, the control line 101 includes a CPU (Central Processing Unit) 130, a communication circuit 104, a ROM (Read Only Memory) 109, a RAM (Random Access Memory) 110, and an EEPROM (Electrically Erasable and Programmable ROM) 111. , A display control unit 112, a press detection unit 115, a sound generation control unit 116, a LAN (Local Area Network) module 118, a camera module 120, a USB (Universal Serial Bus) interface (hereinafter abbreviated as USB I / F) 121, A clock circuit 122 and a clock signal generator 140 are connected.

  As shown in FIG. 1, the data line 102 includes a communication circuit 104, a ROM 109, a RAM 110, an EEPROM 111, a display control unit 112, a press detection unit 115, a D / A converter 105, an A / D converter 108, A sound control unit 116, a LAN module 118, a camera module 120, a USB I / F 121, and a clock circuit 122 are connected.

  Further, the transmission / reception antenna 103 is connected to the communication circuit 104, an LCD (Liquid Crystal Display) 113 as a display unit is connected to the display control unit 112, and a key operation unit 114 is connected to the press detection unit 115. The LAN module 118 is connected to a LAN transmission / reception antenna 119.

  The D / A converter 105 and the sound control unit 116 are connected to a speaker 106 that is also used as a receiver, and the A / D converter 108 is a microphone that is used as a transmitter (in FIG. 1). , Described as a microphone.) 107 is connected. Here, although it has been described that the speaker 106 is connected to the sound control unit 116 and the D / A converter 105, the present invention is not limited to this. Of course, it is also possible to provide individual speakers.

  Although the cellular phone terminal of this embodiment is not shown, for example, when a rechargeable battery pack is used as a power source and the cellular phone terminal is turned on, the driving power is supplied to each circuit portion. A power supply circuit is provided.

  In the mobile phone terminal of this embodiment, a CPU 130, ROM 109, RAM 110, and EEPROM 111 constitute a microcomputer, and this microcomputer controls each part of the mobile phone terminal of this embodiment. It has a function as.

[Basic operation of mobile communication terminal]
Next, the operation of the mobile phone terminal of this embodiment having the configuration shown in FIG. 1 will be described. First, a process at the time of incoming call to the own apparatus, that is, a process in the case of responding to a phone call received by the own apparatus will be described. The incoming call notification signal transmitted is received and selected by the transmission / reception antenna 103 and the communication circuit 104. The signal selected in the communication circuit 104 is demodulated in the communication circuit 104, and the demodulated signal is notified to the CPU 130 via the control line 101.

  When the received and tuned signal is an incoming notification signal addressed to the own device, the CPU 130 reads out the ring tone data that forms the ring tone such as the ring melody prepared in advance in the ROM 109, for example. The sound is supplied to the sound control unit 116. The sound control unit 116 forms an incoming ring tone of an analog signal from the incoming ring tone data supplied thereto, and supplies this to the speaker 106. As a result, a ring tone is emitted from the speaker 106, and the user of the mobile phone terminal is notified that there is an incoming call.

  Similarly, when CPU 130 detects an incoming notification signal addressed to itself, it controls a vibration device (vibrator) (not shown) to vibrate, and informs the user of the mobile phone terminal that there is an incoming call due to this vibration. You can also be notified. Note that it is possible to use both the incoming call notification by the ringtone and the incoming call notification by vibration, or it is possible to use only one of them.

  When the user of the mobile phone terminal notices that there is an incoming call to his / her mobile phone terminal due to a ring tone or vibration, the user can use a call start key ( Off-hook key). When the call start key is operated, this is detected by the press detection unit 115 and notified to the CPU 130 through the control line 101.

  When the CPU 130 receives a notification that the call start key is pressed from the press detection unit 115, the CPU 130 controls the communication circuit 104 to perform a predetermined communication line connection process such as sending a response signal. As a result, a communication line is connected between the communication terminal that has called the own device and the own device, and a call can be made.

  That is, the signal from the other party who made the call is received and tuned through the transmission / reception antenna 103 and the communication circuit 104, and is demodulated in the communication circuit 104 to be a baseband signal. The signal is supplied to the D / A converter 105 through the line 102.

  The D / A converter 105 converts the baseband signal supplied thereto into an analog signal and supplies the analog signal to the speaker 106. Thereby, sound corresponding to the signal transmitted from the other party is emitted from the speaker 106.

  The voice from the user of the cellular phone terminal is collected by the microphone 107 and supplied to the A / D converter 108 as an analog electric signal. The A / D converter 108 converts the analog audio signal supplied thereto into a digital signal and supplies it to the communication circuit 104 through the data line 102.

  The communication circuit 104 forms a transmission signal including the digital signal supplied thereto and transmits it through the transmission / reception antenna 103. As a result, the user's voice is transmitted to the communication partner. In this way, it is possible to make a call by answering a call received from the own device and connecting a communication line to the other party who made the call.

  When making a call from the mobile phone terminal of this embodiment, for example, the user presses the numeric key provided in the key operation unit 114 of the mobile phone terminal and inputs the telephone number of the intended destination. Then, the pressed numeric key is detected by the pressing detection unit 115 and notified to the CPU 130 through the control line 101. The CPU 130 temporarily stores this in, for example, the RAM 110, and when detecting that the call start key has been pressed, the CPU 130 forms a transmission signal including the received telephone number and transmits it through the communication circuit 104 and the transmission / reception antenna 103.

  This outgoing signal is transmitted to the telephone terminal of the intended destination through the equipment of the telephone company such as a base station or an exchange. Then, when the other party performs a response operation in response to the transmission signal, a response signal is transmitted from the other party. When this response signal is received, the communication circuit 104 controls the purpose of the circuit under the control of the CPU 130. Confirm that the communication line is connected to the other party, and send / receive antenna 103, communication circuit 104, D / A conversion as in the case of making a call in response to the incoming call to the above-mentioned own device. A telephone call can be made through the device 105, the speaker 106, the microphone 107, and the A / D converter 108.

  When making a call, select the desired phone number from the so-called phone book data to be registered in advance in the mobile phone terminal, and press the call start key, It is also possible to make outgoing calls.

  In addition, when a call is received, the phone number of the other party who made the call is displayed, or the current time is displayed, or when the above phone book data is registered or selected, A display control unit 112 and an LCD 113 are provided for displaying a telephone number, a name and name corresponding to the telephone number, or displaying various guidance messages and warning messages. That is, the display control unit 112 displays various types of information on the LCD 113 under the control of the CPU 130. The LCD 113 has a relatively large display screen, so that various display information can be provided to the user with high visibility.

  In this way, the mobile phone terminal of this embodiment can respond to an incoming call or make a call to a target destination.

  Furthermore, the mobile phone terminal of this embodiment accesses the Internet via a function provided by the telephone company, for example, accesses a target home page, searches for information, or downloads necessary information. Or send and receive e-mails.

  When connecting to the Internet through the mobile phone terminal of this embodiment, the user operates the predetermined Internet connection key provided in the key operation unit 114, and this is detected by the press detection unit 115, A request for connection to the Internet is notified from the press detection unit 115 to the CPU 130 through the control line 101.

  In response to this, the CPU 130 controls the communication circuit 104 through the control line 101, forms a connection request to the Internet in the communication circuit 104, and transmits this through the transmission / reception antenna 103. The system on the telephone company side that has received the request for connection to the Internet connects the requesting mobile phone terminal to the Internet in response to the request.

  As a result, the cellular phone terminal of this embodiment is connected to the Internet, accesses a target server, sends and receives packet data, requests provision of necessary information, and provides information corresponding to this. You will be able to receive.

  In addition, the cellular phone terminal according to this embodiment inputs characters through the key operation unit 114 and the press detection unit 115, and transmits the characters while confirming the input characters displayed on the display unit 113 through the display control unit 112. The e-mail to be created can be created in the transmission folder of the EEPROM 111. In this case, the input character information is supplied to the EEPROM 111 and the display control unit 112 through the data line 102 under the control of the CPU 130.

  The transmission e-mail formed in the transmission folder in the EEPROM 111 in this manner is detected by the press detection unit 115 by performing an operation of transmitting the e-mail to the key operation unit 114, and is controlled. The CPU 130 is notified through the line 101. The CPU 130 controls the communication circuit 104 so that the electronic mail created in the transmission folder of the EEPROM can be transmitted to the designated mail server of the destination.

  Further, when the e-mail to the own machine is stored in the own mail server, when the operation for instructing the reception of the e-mail addressed to the own machine is performed on the key operation unit 114, this is detected as the press detection unit 115. And is notified to the CPU 130 through the control line 101. In this case, the CPU 130 controls the communication circuit 104, accesses its own mail server, downloads the electronic mail addressed to itself, and stores it in the reception folder of the EEPROM 111.

  The e-mail addressed to the own device stored in the reception folder in the EEPROM 111 in this way is read out under the control of the CPU 130, supplied to the display control unit 112 through the data line 102, and sent to the LCD 113 through the display control unit 112. It is supplied so that it can be displayed on the display screen. As a result, an e-mail addressed to the own device from the other party can be acquired, displayed on the LCD 113, and read.

  As described above, the mobile phone terminal according to this embodiment can not only perform telephone communication but also have a function of connecting to the Internet, and can also acquire information and send / receive e-mails through the Internet. It can be done. That is, the cellular phone terminal of this embodiment can perform data communication over the Internet in addition to telephone communication as a wide area communication function.

  Furthermore, as described above, the cellular phone terminal of this embodiment also includes the LAN module 118, and is connected to a predetermined LAN and communicates between devices connected to the predetermined LAN. It also has a function to perform. In addition, a camera module is also provided, and an image of a subject is taken, captured as digital image data, stored in the EEPROM 111, read out as necessary, supplied to the LCD 113 through the display control unit 112, and displayed on the LCD 113. It can be used by displaying it on the screen.

  The mobile phone terminal of this embodiment also includes a USB I / F 121 and can connect various external devices including the USB I / F. For example, a USB memory is connected to back up digital image data stored in the EEPROM 111 to the USB memory, or a USB I / F 121 is connected to a personal computer to back up the data to a personal computer hard disk. Various data can be provided from a personal computer.

  Further, the clock circuit 122 has a so-called calendar function, can provide the current date, current day of the week, and the current time, and measures the processing time according to the control of the CPU 130. It is also possible to measure the interval.

  In FIG. 1, a clock signal generator 140 generates a clock signal to be supplied to each part of the mobile phone terminal of this embodiment and supplies it to a target part. The clock signal generator 140 can form and supply a clock signal having a different frequency for each supply destination of the clock signal.

  For example, a CPU clock signal used by the CPU 130 to drive the CPU 130 or a clock signal for accessing the memory, that is, data is exchanged between the CPU 130 and each memory, and the data is recorded in the memory. In addition, the clock signal generation unit 140 can generate a so-called memory bus clock signal that is a clock signal used when reading data from the memory, and various other clock signals used in each unit.

  Further, the clock signal generator 140 can change the frequency for each clock signal to be generated under the control of the CPU 130. For example, it is possible to change the frequency of only the CPU clock signal, change the frequency of only the memory bus clock signal, or change both the frequencies of the CPU clock signal and the memory bus clock signal.

[Data acquisition / search processing]
In the cellular phone terminal of this embodiment shown in FIG. 1, a system configuration based on a database is applied. FIG. 2 is a block diagram for explaining a configuration example of a database system applied to the mobile phone terminal of this embodiment. As shown in FIG. 2, the configuration example of the database system applied to the mobile phone terminal of this embodiment includes a UI (User Interface) layer 10, a middleware layer 20, and a physical layer 30.

  The UI layer is a part composed of various application software 11 used directly by the user. The physical layer 30 is a so-called platform portion including an OS (Operating System) and various hardware resources. As shown in FIG. 2, the physical layer 30 of the database system of this example includes a mail database (shown as mail DB in FIG. 2) 31a, an image database (shown as image DB in FIG. 2) 31b, a music database (shown in FIG. 2). 2 is described as a music DB.) Various databases such as 31c and various memories such as a CPU (Central Processing Unit) 130, ROM 109, RAM 110, and EEPROM 111 are provided. A certain OS is also provided.

  Note that various databases (DB) provided in the physical layer 30 include a ROM 109, a RAM 110, an EEPROM 111, or a flash memory connected to the USB I / F 121 built in the mobile phone terminal of this embodiment. Connected to a database connected to a network server that can be connected through the communication circuit 104 and the transmission / reception antenna 103, or to a LAN connected through the LAN module 118 and the LAN transmission / reception antenna 119. A database provided in a storage device or the like is also included. Therefore, the physical layer 30 also includes a hardware part that implements a communication function.

  The middleware layer 20 is a generic term for software located between the UI layer and the physical layer, as shown in the figure, and is a part having a function of linking a user application and a platform. As shown in FIG. 2, the middleware layer 20 of the database system in this example includes mail data collection software (shown as mail data collection in FIG. 2) 21a and image data collection software (shown as image data collection in FIG. 2). 21b, various data collection software such as music data collection software (described as music data collection in FIG. 2) 21c, search condition determination system (described as search condition determination in FIG. 2) 22, DBMS (Database Management System) 23, a clock control system (denoted as clock control in FIG. 2) 24, and the like.

  Various data collection software such as the mail data collection software 21a, the image data collection software 21b, and the music data collection software 21c has a function of collecting data according to instructions from the application software of the UI layer. The search condition determination system 22 analyzes the search conditions from various data collection software, and collects the target data from the target database by cooperating with the DBMS based on the search conditions. It is a part to make. The DBMS 23 includes various software for maintaining and operating the database.

  As shown in FIG. 2, the clock control system 24 is connected to the search condition determination system 22 and, as will be described in detail later, in cooperation with the search condition determination system 22, the mobile phone terminal of this embodiment In the data acquisition / retrieval process performed in, the data acquisition / retrieval process speed is increased by increasing the frequency of the clock signal used (by clocking up) only at the bottleneck part that prevents the speeding up of the process. It is trying to realize.

  That is, in the mobile phone terminal of this embodiment having the configuration shown in FIG. 1 and applying the database system shown in FIG. 2, the CPU 130 functions, and the ROM 109, RAM 110, and EEPROM 111 mounted on its own device. , A database on a network accessed through the communication circuit 104, a database formed in an external device connected to a predetermined LAN accessed through the LAN module 118, or a USB connected to the USB I / F 121 It is possible to acquire target data from a database formed in a memory module (flash memory drive) or to search and acquire only data that meets a predetermined condition.

  In this specification, the process of acquiring all data from the target database and the process of searching and acquiring only the data that matches the conditions from the target database are referred to as data acquisition / search processes in this specification. . In this embodiment, the term “database” includes, for example, a file or folder in which predetermined data such as a mail holder is accumulated, in addition to what is technically arranged as a database.

  In the data acquisition / retrieval process, it is desirable to reduce the waiting time of the user of the mobile phone terminal as much as possible. For this reason, it is conceivable to increase the processing speed by increasing the frequency of the clock signal used when executing the data acquisition / retrieval processing.

  However, in the data acquisition / retrieval process, the amount of data to be acquired differs depending on the search condition, and the time taken for the acquisition / retrieval process also varies. For this reason, even when the frequency of the clock signal is constantly increased during the data acquisition / retrieval process, the frequency of the clock signal is low even when the amount of acquired data is small and does not take much processing time. However, if this is done, the power consumption may increase unnecessarily.

  Therefore, in the mobile phone terminal of this embodiment, when performing the data acquisition / retrieval process, the bottleneck part that actually takes time is specified, and the clock signal of only the specified bottleneck part is specified. By increasing the frequency and speeding up the processing at the bottleneck portion, the entire data acquisition / retrieval processing is speeded up.

  In this case, since the clock signal having the normal frequency is used in the portion other than the bottleneck portion, the frequency of the clock signal does not become higher than necessary in the portion other than the bottleneck portion, and is wasted. The power consumption is not increased.

  For this reason, in the cellular phone terminal of this embodiment, when data acquisition / search processing is performed, search conditions used for data acquisition / search processing and result information (management information) for past acquisition / search processing ), The bottleneck portion in the data acquisition / retrieval processing is appropriately identified, and the clock control for controlling the frequency of the target clock signal can be appropriately performed only in the identified bottleneck portion. I am doing so.

  Hereinafter, data acquisition / retrieval processing in the cellular phone terminal of this embodiment, which can perform appropriate control of the clock signal, will be specifically described. In the database system described with reference to FIG. 2, the search condition is described using SQL (Structured Query Language). From the search condition described using the SQL sentence, it is possible to predict whether (A) a process that requires an operation / a process that does not require an operation, or (B) one or a plurality of search results. With regard to (A), it is possible to make a determination based on the presence or absence of sorting, the presence or absence of matching conditions, and the like. In addition, (B) can be determined by the presence or absence of a perfect match condition with the primary key.

From this, the search conditions described in the SQL sentence can be classified as follows. That is, the search condition described in the SQL statement is
(1) An operation is required and there is only one search result
(2) Operations are required and there are multiple search results
(3) No computation is required and there is only one search result
(4) No calculation is required and there are multiple search results
It can be classified into four.

  In this case, in the case of (1) and (3), that is, when there is one search result, since the data to be acquired is one, in most cases, the acquisition / search process itself is fast. There is no need to clock up. However, in the cases of (2) and (4), it is difficult to determine whether or not processing takes time with only the SQL sentence search condition.

  Therefore, when the search conditions are (2) and (4) above, whether the processing needs to be clocked up (whether it takes time) considering the result information on the past acquisition / search processing. It is possible to judge. Here, the result information on the past acquisition / search process includes the search conditions used in the past acquisition / search process, the number of search results in the past acquisition / search process, and the past information as described below. This is associated with the acquisition time indicating the time taken for the acquisition / retrieval process.

  FIG. 3 is a diagram for explaining an example of a search condition-acquisition time table which is result information on past acquisition / search processing used in the mobile phone terminal of this embodiment. The search condition-acquisition time table in this example is formed in, for example, the RAM 110 of the mobile phone terminal of this embodiment, and new data is added each time data acquisition / search processing is performed.

  As shown in FIG. 3, the search condition-acquisition time table in this example shows the search condition used (SQL sentence) and the number of data acquired when the acquisition / search process is performed according to the search condition. Management data (in relation to the number of search results and the acquisition time indicating the time (time required to acquire the target data) when the acquisition / search processing is performed according to the search condition. Table information).

  Here, the search condition is described by an SQL sentence, and the number of search results is the number of data acquired in a predetermined memory of the mobile phone terminal according to the search condition. In addition, when the acquisition / retrieval process of data according to the search condition is executed, the acquisition time is calculated by using the function of the clock circuit 122 of the mobile phone terminal according to this embodiment in parallel with the process. This is the time from the start to the end of the acquisition / search process.

  Specifically, in the case of the search condition-acquisition time table shown in FIG. 3, the management data in the first row is an instruction that the search condition acquires all data from the folder A (Folder A). By the processing according to the search condition, 1000 pieces of data are acquired, and the acquisition time (processing time) at this time is 500 [ms].

  The management data in the second row is an instruction that the search condition acquires all data from the folder A (FolderA) and rearranges the acquired data in the column name display order (DispOrder) order. By processing according to the search condition, 1000 pieces of data are acquired, and the processing time at this time is 800 [ms].

  In the management data on the third line, the search condition is that all the data whose folder ID (Folder ID) is “0 (zero)” is acquired from the outgoing mail (SendMail), and the acquired data is UTC (Coordinated Universal Time). It is instructed to sort in order, row ID (row ID), and 100 data is acquired by processing according to the search condition, and the processing time at this time is 300 [ms]. Show.

  The management data on the fourth line is an instruction to acquire data whose row ID (Row ID) is “2” from the transmitted mail, and the processing according to the search condition One data is acquired, and the processing time at this time is 10 [ms].

  As described above, each time the acquisition / search processing is performed, management data (table information) including the search condition, the number of search results, and the acquisition time is stored in the RAM 110 of the mobile phone terminal according to this embodiment in FIG. Are recorded in the search condition-acquisition time table formed as shown in FIG. Based on the result information of the search condition-acquisition time table, how many data can be acquired when the data acquisition / search process is performed according to what search condition, and what is the acquisition time (processing time) at that time? It is possible to know whether it is milliseconds [ms].

  In the data acquisition / retrieval process, the search condition to be used is that the above-described (2) operation is required and there are a plurality of search results, and (4) the operation is not required and there are a plurality of search results. In FIG. 3, based on the search condition, the search condition-acquisition time management table configured as shown in FIG.

  The search condition-acquisition time management table is referenced based on the search condition used this time. Basically, data that completely matches the search condition is referred to. If it does not exist, the search condition used this time is the same as the data retrieval location (table name), the data acquisition condition level (whether the acquisition target is all data or partial data), sorting, etc. Refer to data with the same processing level.

  For example, if the search condition used this time is “Select * from SendMail where Folder ID = 0 order by A desc.B desc”, the search condition-acquisition time management table shown in FIG. There is no data with search conditions. However, in the third row of the search condition-acquisition time management table shown in FIG. 3, the place where the data is retrieved is “SendMail”, and the data acquisition condition level is “partial data (Folder ID = 0)”. In this case, since data having the same processing level such as rearrangement exists, the data in the third row is referred to.

  In this way, if the data acquisition location, the data acquisition condition level, and the processing level such as sorting are the same, the data extraction conditions and the key information for sorting (so-called sort key) are different. Since it can be expected that the processing contents are the same, the data in the search condition-acquisition time management table is referred to.

  Note that the data extraction conditions for acquiring a plurality of data and those for acquiring only one data are different in the acquisition condition level, so that they are not subject to data to be referenced. However, reference may be made if the number of sort keys is different. For example, if the data acquisition condition level and the data acquisition condition level are the same, but the number of sort keys to be used is different, if the difference in the number of sort keys to be used is within 2, the reference data is used. be able to.

  When the search conditions are (2) and (4), the search condition-search time management table already formed in the RAM 110 is referred to based on the search condition used this time. If the corresponding management data does not exist in the search condition-search time management table, data acquisition / search processing is performed using a normal clock signal without performing clock-up. When the corresponding management data exists in the search condition-search time management table, the contents of the clock control are determined based on the management data.

That is,
(A) If the number of retrieval results of the referenced management data is a small number, the clock is not increased.
(B) When the search condition (2) above (calculation is required and multiple search results are used) and the number of search results of the management data referred to is small and the acquisition time is long, the CPU clock is increased. I do.
(C) When the search condition (2) above (calculation is required and multiple search results are used) and the number of search results of the management data referred to is large and the acquisition time is large, the CPU clock is increased. And memory bus clock up.
(D) When the search condition (4) above (no operation is required and there are a plurality of search results) is used and the number of search results of the referenced management data is small and the acquisition time is large, Not performed.
(E) When the search condition (4) (no operation is required and a plurality of search results) is used and the number of search results of the management data referred to is large and the acquisition time is long, the memory bus clock Do up.

  In the case of (a), the clock signal frequency up control (clock up) is not performed even if the search condition is a condition for acquiring a plurality of data. This is because there is little load on the data acquisition / retrieval processing itself, and it can be determined that the processing can be performed quickly with a clock signal having a normal frequency.

  Also, in the case of (b) above, the CPU clock signal frequency up control (CPU clock up) is performed because the search condition includes calculation, and in the same process in the past, the acquired data is small. Nevertheless, the long acquisition time is because the data acquisition / retrieval process itself (calculation process itself) takes time, and it can be determined that it is necessary to increase the processing speed in the CPU.

  Also, in the case of (c), both the CPU clock up and the memory bus clock signal frequency up control (memory bus clock up) are both performed in the search condition, and the same processing as in the past. In this case, a large amount of data is acquired and the acquisition time is long, which means that both the data acquisition / retrieval process (calculation process) and the process of writing the data acquired by the process to the memory take time. This is because it can be determined that it is necessary to speed up both the processing in the CPU and the processing for writing the acquired data into the memory.

  Also, in the case of (d) above, the CPU clock signal or memory bus clock signal frequency up-control (clock-up) is not included in the search condition, and is acquired in the same process in the past It can be determined that the situation in which the acquisition time is large despite the small amount of data is not caused by the processing in the mobile phone terminal such as the processing of the CPU or the processing of writing the acquired data into the memory. It is. For example, it can be assumed that there is a case where the database where the data is retrieved does not exist in the mobile phone terminal, such as on an external network, and it takes time to wait for network processing, etc. In this case, it can be determined that no increase in the frequency of any clock signal can contribute to speeding up the data acquisition / retrieval process.

  Further, in the case of (e), the memory bus clock is increased in spite of the fact that the search condition does not include an operation, but in the same process in the past, much data has been acquired, and the acquisition time This is because it takes time to write the acquired data to the memory, and it can be determined that it is necessary to speed up the process of writing the acquired data to the memory.

[Clock control processing during data acquisition / retrieval processing]
Next, an outline of clock processing performed at the time of data acquisition / retrieval processing in the cellular phone terminal of this embodiment will be described. FIG. 4 is a block diagram for explaining the outline of the clock control process performed in the mobile phone terminal of this embodiment. In the mobile phone terminal of this embodiment, it is not simply determined whether or not the data acquisition / retrieval process becomes a heavy bottleneck based on the retrieval condition (processing contents). By feeding back management data (table information) in the retrieval condition-acquisition time management table for data acquisition / retrieval processing performed in the past, the data acquisition / retrieval processing performed in accordance with the retrieval condition used this time is a burden It is determined whether the processing is a heavy bottleneck.

  That is, when performing data acquisition / retrieval processing, based on the retrieval conditions received through the application software 11 of the UI layer 10 and supplied through the corresponding data collection software 21 of the middleware layer 20 prior to the processing. The search condition determination system 22 of the middleware layer 20 performs a search condition determination process S1 to determine whether clock control is necessary.

  The clock control system 24 of the middleware layer 20 performs the clock control determination process S2 in consideration of the determination result in the search condition determination process S1 and the management data of the search condition-acquisition time management table shown in FIG. Here, as described above, there are a plurality of search results from the search conditions, and the corresponding data in the search condition-acquisition time management table referred to based on the search conditions is the above-described (b), (c), In the case of (e), clock control is performed.

  Thereafter, the DBMS 23 of the middleware layer 20 functions to execute the data acquisition / retrieval process S3. In this case, in the mobile phone terminal of this embodiment, the CPU 130 controls the clock circuit 122 and executes the acquisition time measurement process S4 for measuring the acquisition time that will be required for the acquisition / search process. Then, in this acquisition measurement process S4, management data (table information) formation that associates the search conditions used, the number of search results, which is the number of data acquired through the acquisition / search process, and the measured acquisition time. This is recorded in the search condition-acquisition time management table. Thus, each time the acquisition / retrieval process is executed, information related to the acquisition / retrieval process (result information obtained by performing the acquisition / retrieval process) is fed back.

  Thus, in the mobile phone terminal of this embodiment, at the time of data acquisition / retrieval processing, the result information about the data acquisition / retrieval processing (search condition, number of search results, acquisition time) is fed back, A process that appropriately becomes a bottleneck is specified, and clock control can be appropriately performed only at the time of acquisition / retrieval processing of the data that becomes the specified bottleneck. This speeds up the data acquisition / retrieval process and prevents unnecessary increase in power consumption by clocking up only when it is really necessary in the data acquisition / retrieval process. ing.

  That is, in the mobile phone terminal of this embodiment, the CPU 130 performs data acquisition / retrieval processing, but the target data obtained by the data acquisition / retrieval processing is temporarily stored in the RAM 110, for example. Be made available. Further, when the CPU 130 performs data acquisition / retrieval processing, the CPU 130 can grasp the number of acquired data (number of search results), and controls the clock circuit 122 to control the data. The acquisition time, which is the processing time required for the acquisition / retrieval process, can be measured and grasped.

  As described above with reference to FIG. 3, for example, the result information that is the number of search results and the acquisition time acquired by the CPU 130 by performing the data acquisition / retrieval process is associated with the search condition in the RAM 110. It is stored and held so that the search condition can be referred to as key information.

  Each time the data acquisition / retrieval process is performed, the CPU 130 considers the search condition to be used and the result information to be referred to based on the search condition, and the data acquisition / retrieval process performed in accordance with the current search condition is performed. It is possible to appropriately determine whether or not the processing is a time-consuming bottleneck, and if necessary, control the clock signal generator 140 to control the CPU clock signal used by the CPU 130 and the memory used for accessing the memory. One or both of the bus clock signals can be clocked up.

  Therefore, in the mobile phone terminal of this embodiment, the CPU 130 realizes a function as a processing means, the RAM 110 realizes a function as a memory means and a data memory, and the CPU 130 and the clock circuit 122 serve as acquisition means. The RAM 110 realizes functions as table storage means and table memory, the clock signal generation unit 140 realizes functions as processing clock signal formation means and memory clock signal formation means, and the CPU 130 generates clock signals. A function as a control means is realized.

[Specific example of clock control processing during data acquisition / retrieval processing in mobile phone terminals]
Next, details of the clock control processing during the data acquisition / retrieval processing executed in the mobile phone terminal of this embodiment will be described with reference to the flowcharts of FIGS. 5 to 7 are flowcharts for explaining details of the clock control processing at the time of data acquisition / retrieval processing executed in the mobile phone terminal of this embodiment. FIG. 8 is a flowchart of FIG. 4 is a flowchart for explaining data acquisition / retrieval processing executed in steps S108, S124, S127, S130, S133, S143, S146, and S149 shown in FIG.

  In the mobile phone terminal of this embodiment, while the power is turned on, the CPU 130 activates a so-called main routine process and waits for an instruction input from the user through the key operation unit 114. When the instruction input from is received, the clock control processing shown in FIGS. 5 to 7 is called and executed in the main routine.

  Then, the CPU 130 determines whether or not the process executed in response to the instruction input received through the key operation unit 114 is a data acquisition / search process (step S101). The determination process in step S101 can be determined based on the content of the instruction input received through the key operation unit 114.

  If it is determined in step S101 that the process to be executed is not a data acquisition / retrieval process, the series of processes shown in FIGS. Processing will be executed. In the determination process of step S101, when it is determined that the process to be executed is the data acquisition / search process, the CPU 130 generates a search condition according to the instruction input (step S102).

  In the process of step S102, conditions such as a place to retrieve data (table name), data acquisition conditions (whether all or a predetermined part), or whether sorting is necessary are specified according to an instruction input. Therefore, a search condition for data acquisition / retrieval processing to be executed based on these can be generated as an SQL statement.

  Then, the CPU 130 determines whether or not the number of search results, which is the number of data obtained as a result of the acquisition / search process, is plural based on the search conditions generated in step S102 (step S103). In this step S103, it is possible to determine whether the number of search results is singular or plural based on the search condition data acquisition conditions described in SQL.

  If it is determined in step S103 that the number of search results is not plural (the number of search results is singular), the data acquisition / retrieval process performed according to the search condition is not subjected to a large load, and can be quickly performed. Therefore, the CPU 130 proceeds to the process of step S108, executes the data acquisition / retrieval process (step S109) without clocking up (step S108), and performs the series shown in FIGS. Terminate the process.

  In the flowcharts of FIGS. 5 to 7, for example, the block “not clocked up” indicated by a dotted line in step S <b> 108 or the like does not perform clockup, and thus originally performs no processing. This is described in order to clarify the difference from the processing order when clocking up.

  When determining that the number of search results is plural in the determination process of step S103, the CPU 130 based on the search condition generated in step S102, as will be described later, the RAM 110 of the mobile phone terminal of this embodiment. The corresponding management data is acquired with reference to the search condition-acquisition time management table formed in (Step S104).

  In step S104, as described above, based on the search condition used this time, data that basically matches the search condition is referred to, and there is no data that completely matches the search condition. Is the same as the search condition used this time, the place to get the data (table name), the data acquisition condition level (whether the acquisition target is all data or partial data), and the processing level such as sorting is Reference data that is the same.

  Then, the CPU 130 determines whether or not the corresponding management data has been acquired in step S104 (step S105). If it is determined in step S105 that there is no corresponding management data, there is no information for determining the load of data acquisition / retrieval processing performed according to the search condition. The process proceeds to S108, the data acquisition / retrieval process is executed (Step S109) without clocking up (Step S108), and the series of processes shown in FIGS.

  When it is determined in the determination process of step S105 that the corresponding management data has been acquired, the number of search results of the acquired management data is acquired as the number of search results A (step S106), and the number of search results A is determined in advance. It is determined whether or not the specified value N is smaller (step S107). Here, the specified value N is the number of cases such that the processing time does not become a problem in the processing in the CPU 130 using the clock signal of the normal frequency or the recording processing in the memory, for example, about tens of cases. The prescribed value N may be set to an appropriate value in consideration of the resource of the mobile phone terminal and the like.

  If it is determined in step S107 that the number A of search results is smaller than the predetermined value N, it takes time for the processing in the CPU 130 using the clock signal having the normal frequency and the recording processing in the memory. Since it can be determined that there is no data, the CPU 130 executes the data acquisition / retrieval process (step S109) without clocking up (step S108), and ends the series of processes shown in FIGS.

  When it is determined in step S107 that the search result number A is not smaller than a predetermined value N (the search result number A is not less than a predetermined value N), the CPU 130 determines in step S102. It is determined whether or not the generated search condition is accompanied by a calculation process (step S110). In this step S110, if there is an instruction such as data rearrangement (sorting) or data merging (matching) in the search condition, it can be determined that the operation is accompanied by data sorting (sorting). ) And data matching (matching), etc., it can be determined that the calculation process is not involved.

  When it is determined in the determination process in step S110 that the search condition is accompanied by a calculation process, a process when a plurality of search results shown in FIG. 6 require calculation is executed, and in the determination process in step S110. When it is determined that the search condition is not accompanied by an operation process, the process when there are a plurality of search results shown in FIG. 7 and no operation is required is executed.

  First, a process when it is determined in the determination process of step S110 that the search condition includes a calculation process will be described. In this case, the process proceeds to step S121 shown in FIG. 6, and the CPU 130 searches the number of search results of the corresponding management data in the search condition-acquisition time management table referenced in step S104 (number of search results A acquired in step S106). It is determined whether or not there are few (step S121). In other words, whether or not the determination process in step S121 has a small number of data items (search result number A) that can be acquired by the past data acquisition / search process using search conditions that are the same as or similar to the search conditions used this time. It is to judge whether or not.

  In the determination processing in step S121, when average data acquisition / retrieval processing (normal data acquisition / retrieval processing) is performed, the processing in the CPU 130 using the clock signal of the normal frequency or the memory is performed. The number of data items that will take a certain amount of time for the recording process (for example, the time that the user starts to clearly affect the sense of time for the processing time in the data acquisition / retrieval process) For example, if the number A of search results is less than 100, the number of results is small (“small”), and if it is 100 or more, the number of results is large (“many”).

  Here, although the value “100” is used as an example of the reference value for determining whether or not the number A of search results is small, the present invention is not limited to this. Appropriate values are used according to the performance of the CPU 130 and the memory access performance. That is, when the performance of the CPU 130 and the memory access performance are good, the reference value for determining whether or not the search result number A is small is 200, 300,... A larger value is used, and conversely, if the performance of the CPU 130 or the memory access performance is poor, a smaller value such as 80, 60,... Is used.

  In the determination process of step S121, in the case of normal data acquisition / retrieval processing, the CPU 130 determines that the number of data is not so large as to affect the processing time in the CPU 130, that is, the number of retrieval results is small. Determines whether the acquisition time of the corresponding management data in the acquisition number-acquisition time management table referred to in step S104 shown in FIG. 5 is long (long) or not (step S122). In other words, whether or not the determination process in step S122 has a long processing time (acquisition time) for the past data acquisition / search process using a search condition that is the same as or similar to the search condition used this time? Whether or not.

  In the determination process of step S122, the time for which the acquisition time of the corresponding management data starts to clearly affect the time sense that the user feels for the processing time in the data acquisition / retrieval process, for example, When the time is 100 milliseconds [ms] or more, it can be determined that it is large (long), and when it is less than 100 ms, it can be determined that the time is short (short).

  Of course, the time used in this case is not limited to 100 ms, and larger values such as 200 ms, 300 ms,... May be used in consideration of various conditions such as the frequency of clock control. It is possible to use a smaller value such as 80 ms, 60 ms, and so on.

  In the determination process of step S122, when it is determined that the acquisition time of the corresponding management data is long, the CPU 130 controls the clock signal generation unit 140 and is used by the CPU 130 to determine the CPU clock signal that determines the processing speed in the CPU 130. The frequency is increased to a predetermined frequency (step S123).

  In this step S123, when the normal clock frequency used by the CPU 130 is, for example, several hundred megahertz [MHz], it is further increased by 100 MHz. Of course, this is only an example, and it may be increased to several hundred MHz or more depending on the performance of the CPU 130.

  Then, after the CPU clock is increased in step S123, the CPU 130 executes data acquisition / retrieval processing to be described later in detail with reference to FIG. 8 (step S124). When the process of step S124 is completed, the CPU 130 controls the clock signal generation unit 140 to restore the frequency of the clock signal used by the CPU 130 to the original frequency (step S125), and the series shown in FIGS. Terminate the process.

  Further, when it is determined in the determination process of step S122 that the acquisition time of the corresponding management data is not long (small), that is, in the same acquisition / search process performed in the past, both the number of search results and the acquisition time are large. If not, it is unlikely that it will take time for the data acquisition / retrieval process to be performed this time, so the CPU 130 performs the data acquisition / retrieval process without increasing the frequency of the clock signal (step S126). This is executed (step Sstep S127), and the series of processing shown in FIGS.

  Also, in the determination process of step S121, even when it is determined that the number of search results is small, the CPU 130 obtains the acquisition number-acquisition time management table referred to in step S104 shown in FIG. 5 similarly to the determination process of step S122. It is determined whether the acquisition time of the corresponding management data is long (long) or not (step S128).

  In the determination process of step S128, when it is determined that the acquisition time of the corresponding management data is long, the CPU 130 controls the clock signal generation unit 140 and is used by the CPU 130 to determine the CPU clock signal that determines the processing speed in the CPU 130. The frequency and the frequency of the memory bus clock signal used for writing the acquired data to the memory are increased to a predetermined frequency (step S129).

  Also in step S129, as in the processing in step S123, if the frequency of the CPU clock signal or memory bus clock signal that is normally used is, for example, several hundred megahertz (MHz), the frequency is further increased by 100 MHz. Let it be. Of course, this is only an example, and the frequency can be increased to a higher frequency, for example, several hundred MHz or more, depending on the performance of the CPU 130 and the memory.

  Then, after increasing the frequencies of the CPU clock and the memory bus clock in step S129, the CPU 130 executes data acquisition / retrieval processing, which will be described later in detail with reference to FIG. 8 (step S130). When the process of step S130 is completed, the CPU 130 controls the clock signal generation unit 140 to restore the frequencies of the CPU clock and the memory bus clock to the original frequencies (step S131). The series of processing shown is completed.

  Further, when it is determined that the acquisition time of the corresponding management data is not long (less) in the determination process of step S128, the number of search results is small and the acquisition time is not long in the equivalent acquisition / retrieval process performed in the past. Therefore, since it is unlikely that it will take time for the data acquisition / retrieval process to be performed this time, the CPU 130 executes the data acquisition / retrieval process without increasing the frequency of the clock signal (step S132). (Step S Step S133), the series of processes shown in FIGS.

  In this way, the processing shown in FIG. 6 includes calculation processing in the search conditions used this time, and equivalent acquisition / search processing performed in the past (using search conditions that completely match the search conditions used this time, or In the case of acquisition / retrieval processing using search conditions with the same processing content), if the number of search results is small and the acquisition time is large (in the case of (b) described above), a bottleneck that places a heavy processing load on the CPU 130 The CPU clock is increased by determining that the processing is to be performed, and when the number of search results is large and the acquisition time is also large (in the case of (c) described above), the processing in the CPU 130 and the writing of data to the memory It is determined that the processing is a bottleneck that places a heavy load on the processing, and both the CPU clock up and the memory bus clock up are performed.

  Next, a process when it is determined in the determination process of step S110 that the search condition is not accompanied by a calculation process will be described. In this case, the process proceeds to step S141 shown in FIG. 7, and the CPU 130 searches the number of search results of the corresponding management data in the search condition-acquisition time management table referenced in step S104 (number of search results A acquired in step S106). It is determined whether or not there are few (step S141).

  Similar to the determination process of step S121 shown in FIG. 6, the determination process of step S141 can be acquired by a past data acquisition / search process using a search condition that is the same as or similar to the search condition used this time. It is determined whether or not the number of data items (search result number A) is small.

  Therefore, in the determination process of step S141, when average data acquisition / retrieval process (normal data acquisition / retrieval process) is performed, the process in the CPU 130 using the clock signal of the normal frequency and the memory are performed. The number of data that takes a certain amount of time (for example, the amount of time that the user starts to clearly affect the sense of time perceived by the processing time in the data acquisition / retrieval processing) Yes, for example, if the number of search results A is less than 100, the number of results is small (“small”), and if it is 100 or more, the number of results is large (“many”).

  Of course, here, the value of “100” is used as an example of the reference value for determining whether or not the search result number A is small, but the present invention is not limited to this. Appropriate values are used according to the performance of the CPU 130 and the memory access performance. That is, when the performance of the CPU 130 and the memory access performance are good, the reference value for determining whether or not the search result number A is small is 200, 300,... A larger value is used, and conversely, if the performance of the CPU 130 or the memory access performance is poor, a smaller value such as 80, 60,... Is used.

  If it is determined in step S141 that the search result count A is small, the CPU 130 increases the frequency of the clock signal without increasing the frequency of the clock signal (step S142), regardless of whether the acquisition time is long or short. The acquisition / retrieval process is executed (step S143), and the series of processes shown in FIGS.

  That is, when the search condition does not include arithmetic processing, the number of search results is small, and the acquisition time is short, the processing in the CPU 130 and the writing of data to the memory do not take time, so the clock is not increased. .

  In addition, when the search condition does not include arithmetic processing, the number of search results is small, and the acquisition time is large, the load on the CPU 130 is small according to the search condition and the number of search results is small, so the process of writing data to the memory The situation where there is only a long acquisition time even though it does not take much time is, for example, when the database is not in the mobile phone terminal of this embodiment and exists on the external network, It can be assumed that an acquisition time is required due to external factors outside the mobile phone terminal such as waiting for processing. As described above, when the acquisition time is required due to an external factor, it may not be possible to promote the speeding up of processing regardless of how much the frequency of the clock signal in the mobile phone terminal is increased. The clock is not increased in the terminal.

  If it is determined in step S141 that the number A of search results is not small (large), the CPU 130 determines the corresponding management data in the acquisition number-acquisition time management table referenced in step S104 shown in FIG. It is determined whether the acquisition time is long (long) or not (step S144). The determination process in step S144 depends on the past data acquisition / search process using a search condition that is the same as or similar to the search condition used this time, similar to the determination process in step S122 or step S128 shown in FIG. It is determined whether the processing time (acquisition time) is long (long).

  If it is determined in the determination process in step S144 that the acquisition time is long, the search condition does not include an arithmetic process, so the load on the CPU 130 is small, but the number of search results is large and the acquisition time is large. That is, it can be determined that it takes time to write the data obtained by the acquisition / retrieval process to the memory. Therefore, if it is determined in the determination process of step S144 that the acquisition time is long, the CPU 130 controls the clock signal generation unit 140 to increase the frequency of the memory bus clock signal (step S145).

  In this step S145, as in the case of the process of step S129 shown in FIG. 6, when the frequency of the normally used memory bus clock signal is several hundred megahertz (MHz), for example, Increase the frequency by 100 MHz. Of course, this is only an example, and it is possible to increase the frequency to a higher frequency, for example, several hundred MHz or more according to the performance of the memory or the like.

  Then, after increasing the frequency of the memory bus clock in step S145, the CPU 130 executes data acquisition / retrieval processing, which will be described later in detail with reference to FIG. 8 (step S146). When the process of step S146 is completed, the CPU 130 controls the clock signal generation unit 140 to restore the memory bus clock frequency to the original frequency (step S147), and a series of processes shown in FIGS. Exit.

  If it is determined in the determination process in step S144 that the acquisition time is not long (less), the calculation condition is not included in the search condition, the number of search results is small, and the acquisition time is short. Since this does not occur, and it does not take time to write the acquired data to the memory, the CPU 130 executes the data acquisition / retrieval process without increasing the frequency of the clock signal (step S148). (Step SStep S149), the series of processes shown in FIGS.

  In this way, the process shown in FIG. 7 does not include the calculation process in the search condition used this time, and the same acquisition / search process performed in the past (using a search condition that completely matches the search condition used this time, or If the number of search results is large and the acquisition time is large (in the case of (e) described above), the process of writing data to the memory The memory bus clock is increased by determining that the processing is a bottleneck that is burdensome.

[About data acquisition / retrieval processing]
Next, referring to FIG. 8, the data acquisition / retrieval process executed in steps S108, S124, S127, S130, S133, S143, S146, and S149 shown in FIGS. Will be described.

  In the data acquisition / retrieval process, the CPU 130 accesses the target database in accordance with a calculation condition such as a place to retrieve data of the search condition used this time (target database), a data acquisition condition, and sorting. Then, a series of data acquisition / retrieval processing is started such that target data is acquired, rearranged, written into a predetermined memory (for example, a predetermined area of the RAM 110), and stored (step S201). .

Simultaneously with the processing in step S201, the CPU 130 controls the clock circuit 122 to start measuring the time (acquisition time) required for the current data acquisition / retrieval processing (step S202). Then, the CPU 130 waits until the data acquisition / retrieval process that has been started is completed (step S203), and if it is determined that the acquisition / retrieval process has been completed, the CPU 130 obtains the data by the current acquisition / retrieval process. The number of data items (number of search acquisitions) and the time (acquisition time) required for the current acquisition / search process are specified (step S204).

  Then, the CPU 130 records the management data in which the search condition used this time, the number of search results, and the acquisition time are associated with each other in the search condition-acquisition time management table of the RAM 110 (step S205). The process ends. The generation of the management data and the recording of the management data in the search condition-acquisition time management table serve as feedback of the result of the data acquisition / retrieval process.

  In the processing shown in FIG. 8, as described with reference to the flowcharts of FIGS. 5 to 7, in step S109, step S127, step S133, step S143, and step S149, a clock signal having a normal frequency is used as usual. In step S124, the CPU clock is increased. In step S130, the CPU clock is increased and the memory bus clock is increased. In step S146, the memory bus clock is increased. It is executed after being up.

  That is, as described with reference to FIGS. 5 to 7, in the mobile phone terminal of this embodiment, when the CPU 130 tries to execute data acquisition / search processing, the search condition used and the search Based on the number of search acquisitions and the acquisition time in the past data acquisition / search process using the same or equivalent search conditions as the conditions, the data acquisition / search process to be performed this time is a bottleneck Appropriately grasp whether or not the process is a bottleneck, and if it is a bottleneck process, either or both of the CPU clock signal and the memory bus clock signal are appropriately controlled to increase the clock frequency and acquire data -The search process is speeded up, and the increase in power consumption due to clock-up can be minimized.

  Furthermore, in the mobile phone terminal of this embodiment, in the data acquisition / retrieval process, the data acquisition / retrieval process that is the bottleneck is properly grasped, and the cause of the bottleneck is the CPU It is necessary to appropriately determine whether it is caused by processing in the memory, data writing to the memory, or both, and necessary clock signals, that is, a CPU clock signal and a memory bus clock signal. Or both of them can be appropriately controlled.

[Effects of the embodiment]
In the mobile phone terminal of the above-described embodiment, when acquiring the target data, an appropriate clock-up can be realized, so that both response performance and battery life can be optimized. In addition, the client accessing the database can realize appropriate clock-up without being aware of clock control.

  In addition, as explained with reference to FIG. 4, the use of a processing system with a feedback system enables control of the algorithm problem and the data access speed problem separately, so that it is flexible to changes in the physical layer of the access destination. It can respond to.

  That is, the problem of the algorithm is a problem of processing contents of data collection software such as the application software 11 of the UI layer 10 and the mail data collection software 21a of the middleware layer 20 shown by dotted lines in FIG. The data access speed problem is a problem of the search condition determination system 22 and the clock control system 24 of the middleware layer 20 in FIG.

  Since the clock condition can be handled by the search condition determination system 22 and the clock control system 24 of the middleware layer 20 in FIG. 2, it is not necessary to consider the clock control when creating the application software, and acquisition of the target data is obtained. Since only the search needs to be taken into consideration, appropriate application software and data collection software can be created with sufficient consideration of changes in the physical layer of the access destination.

[Modification]
In the above-described embodiment, it has been described that the frequency of the CPU clock signal or the memory bus clock signal is simply increased. However, the clock signal can be controlled in more detail. For example, a range is set for the number of retrieval results and the retrieval time in the retrieval condition-acquisition time management table to be referenced, and how much the frequency of the clock signal is increased is determined according to the number of retrieval results of the management data referenced and the retrieval time. It can also be done.

  For example, if the number of search results is 100 to 300, the frequency of the clock signal can be increased by 100 MHz, and if the number of search results is 301 to 500, the clock signal can be increased by 200 MHz. . Similarly, regarding the acquisition time, if the acquisition time is 100 ms to 500 ms, the frequency of the clock signal may be increased by 100 MHz, and if the acquisition time is 501 ms to 700 ms, the frequency of the clock signal may be increased by 200 MHz. it can.

  Further, how much the frequency of the clock signal is increased may be determined according to a condition combining the number of search results and the acquisition time. For example, if the number of search results is 100 to 300 and the acquisition time is 300 ms or less, the clock signal is increased by 100 MHz, the number of search results is 301 to 500, and the acquisition time is 301 m to 500 ms. For example, it is possible to increase the clock signal by 200 MHz.

  As described above, even when the frequency of the clock signal is finely controlled, which of the CPU clock signal and the memory bus clock signal is controlled is determined by the processing described with reference to FIGS.

  In the above-described embodiment, only the CPU clock signal is controlled as shown in step S123 of FIG. 6, or the CPU clock signal and the memory bus clock are controlled as shown in step S129 of FIG. It has been described that both of the signals may be controlled, or only the memory bus clock signal may be controlled as shown in step S145 of FIG.

  In any case, the CPU clock signal and the memory bus clock signal can be clocked up to the same extent, and the CPU clock signal and the memory bus clock signal have completely different frequencies. It is also possible to control it. For example, the CPU clock signal and the memory bus clock signal are controlled to increase by 100 MHz, or the CPU clock signal is increased by 100 MHz, but the memory bus clock signal is increased by 200 MHz. Or can be controlled. The control method may be appropriately determined according to the resource of the apparatus to which the present invention is applied.

[Reduction of feedback information]
In the mobile phone terminal of the above-described embodiment, both the number of search results and the acquisition time in the data acquisition / search process are used as information to be fed back. However, it is not limited to this. For example, there is a case where it is desired to simplify the configuration of a system mounted on a mobile phone terminal.

  In such a case, the clock signal may be controlled using one of the number of search results and the acquisition time. For example, only when the search condition and the number of search results are used, the search condition becomes a plurality of search result cases, and there are many search result cases of the same or similar acquisition / search process in the past, The frequency of one or both of the CPU clock signal and the memory bus clock signal can be increased, and in other cases, the frequency of the clock signal can be prevented from being increased.

  In addition, only when the search condition and the acquisition time are used, the search condition is a plurality of search result cases, and the acquisition time of the same or similar acquisition / search process in the past is large, the CPU clock only The frequency of one or both of the signal and the memory bus clock signal may be increased, and in other cases, the frequency of the clock signal may not be increased.

  As can be seen from the flowcharts of FIGS. 6 and 7, as described above, a certain amount of clock control (in addition to the search condition) can be considered even if one of the number of search results and the acquisition time is taken into consideration. Simplified clock control) is possible. In addition, it is possible to perform more appropriate clock control when the acquisition time is used than when the number of search results is used. Also, in this case, whether to control either the CPU clock signal or the memory bus clock signal, or to control both, should be considered and selected from the viewpoint of high-speed processing and power consumption. You can do it.

  However, as in the case of the mobile phone terminal according to the embodiment described with reference to FIGS. 1 to 8, in addition to the search conditions, the number of search results and the acquisition time of the same or similar acquisition / search process in the past Considering both, it is possible to perform more appropriate clock control, which is preferable.

[Other]
In the mobile phone terminal according to the above-described embodiment, the clock signal generation unit 140 has been described as generating various clock signals to be supplied to each unit. However, the present invention is not limited to this, and different clock signals are generated. Of course, it is possible to provide a plurality of clock signal generators to be provided.

  In the embodiment described above, the case where the present invention is applied to a mobile phone terminal has been described as an example. However, the present invention is not limited to this. Because it is difficult to use a hardware platform with sufficient function, a resource problem occurs, and a device that cannot perform clock control as in a personal computer, that is, PDA (Personal Digital Assistants) The present invention is suitable for application to various portable electronic devices (so-called mobile devices) that are carried and used to perform data acquisition / retrieval processing, such as portable information terminals, electronic notebooks, etc. .

It is a block diagram for demonstrating the mobile telephone terminal to which one embodiment of this invention was applied. It is a figure for demonstrating an example of the system model (database system) applied to the mobile telephone terminal shown in FIG. It is a figure for demonstrating an example of the search condition-acquisition time table used with the mobile telephone terminal shown in FIG. It is a block diagram for demonstrating the outline | summary of the clock control processing performed in the mobile telephone terminal shown in FIG. 3 is a flowchart for explaining details of a clock control process at the time of data acquisition / retrieval process executed in the mobile phone terminal shown in FIG. 1; It is a flowchart following FIG. It is a flowchart following FIG. It is a flowchart for demonstrating the data acquisition and search process performed in the process of FIGS.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 ... Control line (control bus), 102 ... Data line (data bus), 103 ... Transmission / reception antenna, 104 ... Communication circuit, 105 ... D / A converter, 106 ... Speaker, 107 ... Microphone, 108 ... A / D conversion 109 ... ROM, 110 ... RAM, 111 ... EEPROM, 112 ... display control unit, 113 ... display unit, 114 ... key operation unit, 115 ... press detection unit, 116 ... sound control unit, 118 ... LAN module, 119 ... LAN transmitting / receiving antenna, 120 ... camera module, 121 ... USB I / F, 122 ... clock circuit, 130 ... CPU, 140 ... clock signal generator

Claims (7)

Processing means for obtaining the target data from the database based on the search condition;
Memory means for storing and holding target data acquired by the processing means;
Obtaining means for obtaining result information obtained by performing processing for obtaining data in accordance with the search condition in the processing means;
Table storage means for storing and holding table information in which the search condition is associated with the result information acquired through the acquisition means;
Processing clock signal generating means for generating a clock signal used in the processing means;
Memory clock signal generating means for generating a clock signal for accessing the memory means;
In the case of executing a process of acquiring data in the processing means based on a search condition newly designated, the table information of the table storage means referred to based on the search condition and the search condition The clock for controlling to increase the frequency of the clock signal to be generated by controlling one or both of the processing clock signal generating means and the memory clock signal generating means when it is determined that it is necessary An information processing apparatus comprising: a signal control unit. The information processing apparatus according to claim 1,
The result information includes a result number that is the number of data items acquired by the processing unit according to the search condition and an acquisition time that is a time taken for the data acquisition process according to the search condition in the processing unit. Yes,
The information processing apparatus according to claim 1, wherein the acquisition unit includes a measurement unit that measures the acquisition time. An information processing apparatus according to claim 2,
In the clock signal control means, the search condition involves an operation, the number of results of the corresponding table information in the table storage means referred to based on the search condition is small, and the acquisition time of the table information is When there are many, the processing clock signal generation means is controlled so as to increase the frequency of the clock signal used by the processing means. An information processing apparatus according to claim 2,
In the clock signal control means, the search condition is accompanied by an operation, the number of results of the corresponding table information in the table storage means referred to based on the search condition is large, and the acquisition time of the table information is also In many cases, the processing clock signal generating means and the memory clock signal generating means are controlled so that the frequency of both the clock signal used in the processing means and the clock signal for accessing the memory means is set. An information processing apparatus that is controlled to be high. An information processing apparatus according to claim 2,
The clock signal control means is such that the search condition does not involve an operation, the number of corresponding table information in the table storage means referred to based on the search condition is large, and the acquisition time of the table information If the number of the clock signals is too large, the information processing apparatus controls the memory clock signal generation means so as to increase the frequency of the clock signal for accessing the memory means. A processing step for performing processing for acquiring target data from the database based on the search condition;
A recording step of recording the target data acquired in the processing step in a predetermined memory;
An acquisition step of acquiring result information obtained by performing a process of acquiring data according to the search condition in the processing step;
A table forming step of recording table information associating the search condition with the result information acquired through the acquisition step in a table storage unit;
When performing a process of acquiring data through the processing step based on a search condition newly designated, the search condition and the table information of the table storage means referred to based on the search condition are included. A clock signal control step of controlling to increase the frequency of one or both of the clock signal used in the processing means and the clock signal for accessing the memory when it is determined that it is necessary And a clock signal control method in an information processing apparatus. Processing means for performing processing for acquiring data, data memory for storing and holding data acquired by the processing means, acquisition means for acquiring result information obtained by performing processing for acquiring data through the processing means, A table memory for storing and holding table information; a processing clock signal forming means for forming a clock signal used in the processing means; a memory clock signal forming means for forming a clock signal for accessing the data memory; A program executed by a computer mounted on an information processing apparatus including a clock signal control unit that controls one or both of the processing clock signal forming unit and the memory clock signal forming unit,
A processing step for causing the processing means to function and performing processing for acquiring target data from a database based on a search condition;
A recording step of recording the target data acquired through the processing step in the data memory;
An acquisition step of acquiring, through the acquisition means, result information obtained by performing a process of acquiring data according to the search condition in the processing step;
A table forming step of recording table information associating the search condition with the result information acquired through the acquiring step in the table memory;
Necessary on the basis of the search condition and the table information of the table memory referred to based on the search condition when the processing from the acquisition step is performed based on the search condition newly designated. The clock control means controls one or both of the processing clock signal forming means and the memory clock signal forming means to the clock signal used by the processing means and the data memory. A clock signal control program for causing the computer to execute a clock signal control step for controlling one or both of the clock signals for accessing the computer.

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