JP2016057871A - Information processing apparatus, information processing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing apparatus configured to prevent stop of background processing even when multiple kinds of commands are executed, an information processing method, and a program.SOLUTION: An exclusive control apparatus 100 includes an execution control section 160 and a command count control section 141. The execution control section 160 causes a processing section 170 to execute required commands so that the number of commands to be executed by the processing section 170 for each command count period may be equal to or less than the maximum number of commands. The command count control section 141 sets the maximum number of commands, according to a cumulative value of weights of the required commands.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an information processing device, an information processing method, and a program, and more particularly, to an information processing device, an information processing method, and a program that execute processing related to a requested command and background processing.

  In a system in which a plurality of hosts access a common resource such as a disk device, a method of performing exclusive control on a request (command) from each host using the exclusive control device is disclosed in, for example, Patent Document 1.

  An exclusive control device such as Patent Literature 1 not only executes processing related to a command received from the host, but also executes background processing such as device failure monitoring. Since the command from the host requires rapid processing, the exclusive control device preferentially executes processing related to the command from the host and performs background processing when there is no command from the host. In this case, if the command load from the host becomes high, execution of background processing may be delayed and the apparatus may not operate normally. Thus, for example, a technique is used that limits the number of commands executed for each predetermined length of period. As a result, when the number of commands executed in a certain period reaches the upper limit, execution of subsequent commands in the period is interrupted and background processing is executed.

  FIG. 16 is a diagram illustrating an example of the execution timing of a received command in such a technique for limiting the number of commands executed for each period. In the example of FIG. 16, the number of executed commands is counted every 500 msec period (command count period). When the number of commands in a certain period reaches 100, the command is executed until the next period is started. Interrupted.

  On the other hand, the number of resources that require exclusive control increases due to the enlarging of the database and the like, and a single exclusive control device is becoming unable to satisfy the demands regarding the number of resources that can be processed and performance. Therefore, a technique for distributing processing using a plurality of exclusive control devices is used. As described above, when a plurality of exclusive control devices are used, failures of some exclusive control devices affect the overall operation, and thus it is necessary for the exclusive control devices to monitor each other. Processing such as alive monitoring is performed in the background, but such background processing is not allowed to be delayed.

  FIG. 17 is a diagram illustrating an example of commands that each exclusive control device receives from a host in a system using a plurality of exclusive control devices.

  As shown in FIG. 17, the commands received from the host can be classified into a plurality of types depending on the time required for processing (CPU (Central Processing Unit) occupancy), the frequency of occurrence, and the like. In a system using a plurality of exclusive control devices, when a certain exclusive control device breaks down, the host device (a plurality of hosts) executes information reproduction (recovery) to other exclusive control devices. In the recovery, commands having a high CPU occupancy rate are issued continuously like the recovery commands in FIG. In this case, even if a technique for limiting the number of commands to be executed for each period of a predetermined length is used, the background processing may not be executed because the CPU continues to be occupied without reaching the upper limit. For this reason, the host notifies the exclusive control device of the start and end of recovery, and the exclusive control device takes measures to prevent malfunction due to the stop of execution of background processing during recovery.

JP 2003-330906 A

  As described above, in the method of limiting the number of commands to be executed for each cycle of a predetermined length in the exclusive control device, there is a problem that background processing is not executed depending on the type of command.

  An object of the present invention is to provide an information processing apparatus, an information processing method, and a program capable of solving the above-described problems and preventing background processing from being stopped even when a plurality of types of commands are executed. There is.

  The information processing apparatus according to the present invention includes an execution control unit that instructs the processing unit to execute a requested process so that the number of processes per cycle of a predetermined length executed by the processing unit is equal to or less than the maximum number of processes. And a processing number control means for setting the maximum processing number in accordance with the accumulated value of the requested processing weights.

  In the information processing method of the present invention, the maximum number of processes is set according to the accumulated value of the requested process weights, and the number of processes per period of a predetermined length executed by the processing means is equal to or less than the maximum number of processes. The processing means is instructed to execute the requested processing.

  The program of the present invention sets the maximum number of processes in the computer according to the accumulated value of the requested process weights, and the number of processes per period of a predetermined length executed by the processing means is the maximum number of processes. In order to execute the requested processing, the processing means is instructed to execute the requested processing.

  The effect of the present invention is to prevent the background process from being stopped even when a plurality of types of commands are executed.

It is a block diagram which shows the characteristic structure of embodiment of this invention. It is a block diagram which shows the structure of the exclusive control apparatus 100 in embodiment of this invention. It is a block diagram which shows the structure of the exclusive control system 1 in embodiment of this invention. It is a block diagram which shows the structure of the exclusive control apparatus 100 implement | achieved by computer in embodiment of this invention. It is a flowchart which shows the weight total process in embodiment of this invention. It is a flowchart which shows the command reception process in embodiment of this invention. It is a flowchart which shows the command execution control processing in embodiment of this invention. It is a flowchart which shows the command execution process in embodiment of this invention. It is a figure which shows the example of the total table 232 in embodiment of this invention. It is a figure which shows the example of the weight table 242 in embodiment of this invention. It is a figure which shows the example of the default command number 244 in embodiment of this invention. It is a figure which shows the example of the weight threshold value 245 in embodiment of this invention. It is a figure which shows the execution example of the process which concerns on a command, and a background process in embodiment of this invention. It is a figure which shows the execution example (continuation of FIG. 13) of the process which concerns on a command, and a background process in embodiment of this invention. It is a figure which shows the execution example (continuation of FIG. 14) of the process which concerns on a command, and a background process in embodiment of this invention. It is a figure which shows the example of the execution timing of the received command in the technique which restrict | limits the number of commands performed for every period. It is a figure which shows the example of the command which each exclusive control apparatus receives from a host in the system using a some exclusive control apparatus.

  First, the configuration of the embodiment of the present invention will be described. FIG. 3 is a block diagram showing a configuration of the exclusive control system 1 in the embodiment of the present invention.

  The exclusive control system 1 includes a plurality of exclusive control devices 100, a plurality of hosts 300, and resources 400. The exclusive control device 100 is an embodiment of the information processing device of the present invention.

  Each exclusive control device 100 is connected to each of a plurality of hosts 300 via a network or the like. Each exclusive control device 100 is connected to a resource 400 shared by a plurality of hosts 300. The resource 400 is a disk device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). Further, the resource 400 may be an extended memory or the like.

  Each of the plurality of hosts 300 transmits a command to any of the plurality of exclusive control devices 100 to access the resource 400 (for example, read / write data on the resource 400).

  The plurality of exclusive control devices 100 cooperate with each other to perform exclusive control related to access from the host 300 to the resource 400 (for example, restriction of simultaneous access from the multiple hosts 300 to the same data on the resource 400). Further, when a failure occurs in any of the plurality of exclusive control devices 100, the host 300 performs recovery so that the operation can be continued with the remaining exclusive control devices 100.

  FIG. 2 is a block diagram showing a configuration of the exclusive control device 100 in the embodiment of the present invention.

  The exclusive control device 100 includes an interval timer 110, a sleep timer 120, a total control unit 130, an index storage unit 131, and a total table storage unit 132. The exclusive control device 100 includes a command receiving unit 140, a weight table storage unit 142, a maximum command number storage unit 143, a default command number storage unit 144, a weight threshold storage unit 145, and an execution waiting queue 150. Furthermore, the exclusive control device 100 includes an execution control unit 160, an execution counter storage unit 161, a control counter storage unit 162, a background processing time storage unit 163, and a processing unit 170.

  The interval timer 110 is a timer that wakes up the aggregation control unit 130 and the execution control unit 160 at a predetermined time interval (interval). The length of the interval may be set from the outside by an administrator or the like, for example. In the embodiment of the present invention, the period for calculating the number of commands executed by the exclusive control device 100 (the number of processes) (command count period), and the period for calculating the total value of the weight accumulation counter, which will be described later. The (total weight period) is set based on the number of intervals.

  The sleep timer 120 is a timer that wakes up the execution control unit 160 after a set time.

  The index storage unit 131 stores the current index 231. The current index 231 indicates an index of a weight accumulation counter that is accumulating command weights in the aggregation table 232.

  The aggregation table storage unit 132 stores the aggregation table 232. The aggregation table 232 stores a weight accumulation counter for each interval.

  FIG. 9 is a diagram showing an example of the aggregation table 232 in the embodiment of the present invention. In the example of FIG. 9, the tabulation table 232 is an array including n weight accumulation counters (n is an integer where n ≧ 2, for example). The n weight accumulation counters are used cyclically. In each weight accumulation counter, a cumulative value of command weights in a corresponding interval is set.

  The aggregation control unit 130 increments the current index 231 (adds 1) for each interval, and initializes the weight accumulation counter indicated by the current index 231 in the aggregation table 232. When the value of the current index 231 after the increment exceeds the number of weight accumulation counters in the aggregation table 232, the value of the current index 231 is updated to indicate the head weight accumulation counter in the aggregation table 232.

  The weight table storage unit 142 stores a weight table 242. The weight table 242 indicates weights indicating the degree to which the process related to each command occupies the CPU of the exclusive control device 100 or the degree of influence the process related to each command has on other processes.

  FIG. 10 is a diagram showing an example of the weight table 242 in the embodiment of the present invention. The weight of each command is determined based on the characteristics of each command, CPU occupancy, and occurrence frequency as shown in FIG. The weight table 242 is set in advance by, for example, an administrator.

  The maximum command number storage unit 143 stores the maximum command number 243. The maximum command number 243 indicates the upper limit of the number of commands (number of processes) in the command count cycle. The maximum command number 243 is updated by the command number control unit 141 as described above.

  The default command number storage unit 144 stores a default command number 244. The default command number 244 indicates a value set to the maximum command number 243 at the normal time. The default command number 244 is determined based on the processing capability (performance) of the exclusive control device 100. The default command number 244 is preset by, for example, an administrator.

  FIG. 11 is a diagram showing an example of the default command number 244 in the embodiment of the present invention. In the example of FIG. 11, “18” is set as the default command number 244.

  The weight threshold storage unit 145 stores the weight threshold 245. The weight threshold 245 is used to determine whether to limit the maximum command number 243 to a value smaller than the default command number 244. The weight threshold value 245 is compared with the total value of the weight accumulation counter in the weight total period. The weight sum period is a period of a predetermined number of intervals before the current interval. The weight threshold value 245 is set in advance by an administrator or the like, for example.

  FIG. 12 is a diagram showing an example of the weight threshold value 245 in the embodiment of the present invention. In the example of FIG. 12, “6” is set to the weight threshold value 245.

  The command receiving unit 140 queues the command received from the host 300 to the execution waiting queue 150 and wakes up the execution control unit 160.

  The command receiving unit 140 includes a command number control unit 141 (or a processing number control unit). The command number control unit 141 extracts the weight of the command received from the host 300 from the weight table 242 and adds it to the weight accumulation counter indicated by the current index 231. Further, the command number control unit 141 calculates the total value of the weight accumulation counter during the total weight period, and compares the calculated total value with the weight threshold value 245. When the total value is greater than or equal to the weight threshold 245, the command number control unit 141 limits the maximum command number 243 to half of the default command number 244. In other cases, the command number control unit 141 sets the default command number 244 as the maximum command number 243.

  The waiting queue 150 stores commands to be executed by the exclusive control device 100 in a FIFO (First In, First Out) format.

  The execution counter storage unit 161 stores an execution counter 261. The execution counter 261 indicates the number of commands (number of processes) executed in the command count cycle.

  The control counter storage unit 162 stores a control counter 262. The control counter 262 indicates the number of intervals.

  The background processing time storage unit 163 stores the background processing time 263. The background processing time 263 indicates a time required for executing background processing (for example, fault monitoring, performance monitoring, etc. of the exclusive control device 100) other than processing related to the command in each command count cycle. The background processing time 263 is set by an administrator or the like, for example.

  The execution control unit 160 instructs the processing unit 170 to execute a command queued in the execution waiting queue 150.

  If the execution counter 261 has not reached the maximum command number 243, the execution control unit 160 acquires a command from the execution waiting queue 150 and instructs the processing unit 170 to execute the command. Here, the execution control unit 160 increments the execution counter 261 (adds 1). If the execution counter 261 has reached the maximum command number 243, the execution control unit 160 acquires a command from the execution queue 150 after the background processing time 263 has elapsed, and sends the execution of the command to the processing unit 170. Instruct.

  Further, the execution control unit 160 increments (adds 1) the control counter 262 at every interval. The execution control unit 160 detects the elapse of the command count cycle based on the control counter 262, and resets the execution counter 261 every command count cycle.

  The processing unit 170 executes processing (exclusive control processing) related to the command instructed from the execution control unit 160 and transmits the execution result to the host 300. In addition, when the processing unit 170 needs to execute the command (or a command necessary for exclusive control) also in another exclusive control device 100, the processing unit 170 executes the command (or a command necessary for the exclusive control). Transfer to the waiting queue 150 of another exclusive control device 100. In addition, the processing unit 170 executes processing related to the command transferred from the other exclusive control device 100.

  Furthermore, when the execution control unit 160 does not instruct the execution of a command (when there is no command to be executed), the processing unit 170 executes a predetermined background process.

  Note that the exclusive control device 100 may be a computer that includes a CPU and a storage medium that stores a program and that operates by control based on the program.

  FIG. 4 is a block diagram showing a configuration of the exclusive control device 100 realized by a computer in the embodiment of the present invention.

  The exclusive control device 100 includes a CPU 101, a storage means (storage medium) 102 such as a hard disk and a memory, a communication means 103 that performs data communication with other devices, an input means 104 such as a keyboard, and an output means 105 such as a display. Including. The CPU 101 executes a computer program for realizing the functions of the interval timer 110, the sleep timer 120, the aggregation control unit 130, the command reception unit 140, the execution control unit 160, and the processing unit 170. The storage unit 102 stores data of the index storage unit 131, the total table storage unit 132, the weight table storage unit 142, the maximum command number storage unit 143, the default command number storage unit 144, and the weight threshold storage unit 145. The storage unit 102 further stores data of the execution waiting queue 150, the execution counter storage unit 161, the control counter storage unit 162, and the background processing time storage unit 163. The communication unit 103 receives a command from the host 300 and transmits a command execution result to the host 300. In addition, the communication unit 103 writes data to the resource 400 and reads data from the resource 400 in accordance with commands. The input unit 104 receives various settings such as a weight table 242, a default command number 244, a weight threshold value 245, and a background processing time 263 from an administrator or the like. The output unit 105 outputs, for example, the results of various settings to an administrator or the like.

  Next, the operation of the embodiment of the present invention will be described.

  First, the weight aggregation process in the embodiment of the present invention will be described.

  FIG. 5 is a flowchart showing the weight totaling process in the embodiment of the present invention.

  First, when the totaling control unit 130 is woken up by the interval timer 110 (step S101), it increments the current index 231 (step S102).

  The aggregation control unit 130 initializes a weight accumulation counter indicated by the current index 231 in the aggregation table 232 (step S103).

  Thereafter, the processing from step S101 is repeated.

  The command receiving unit 140 adds the weight of the command received from the host 300 to the weight accumulation counter indicated by the current index 231. Since the current index 231 is incremented for each interval, the command weight cumulative value for each interval is sequentially stored in each weight cumulative counter.

  Next, command reception processing in the embodiment of the present invention will be described.

  FIG. 6 is a flowchart showing command reception processing in the embodiment of the present invention.

  First, when the command receiving unit 140 receives a command from the host 300 (step S201), the command number control unit 141 extracts the weight of the received command from the weight table 242 (step S202). The command number control unit 141 adds the extracted weight to the weight accumulation counter indicated by the current index 231 (step S203).

  The command number control unit 141 calculates the total value of the weight accumulation counter values in the total weight period (step S204).

  Here, the length of the total weight period is specified by, for example, the number of intervals m (m is an integer of 1 ≦ m <n), for example. In this case, the command number control unit 141 calculates a total value of m weight accumulation counters before the weight accumulation counter indicated by the current index 231.

  The command number control unit 141 compares the calculated total value with the weight threshold value 245 (step S205). When the total value is greater than or equal to the weight threshold value 245 (step S205 / Y), the command number control unit 141 sets the half of the default command number 244 to the maximum command number 243 (step S206). When the total value is less than the weight threshold value 245 (step S205 / N), the command number control unit 141 sets the value of the default command number 244 as the maximum command number 243 (step S207).

  The command receiving unit 140 queues the received command to the execution waiting queue 150 (step S208), and wakes up the execution control unit 160 (step S209).

  Thereafter, the processing from step S201 is repeated.

  Next, the command execution control process in the embodiment of the present invention will be described.

  FIG. 7 is a flowchart showing command execution control processing in the embodiment of the present invention.

  First, when the execution control unit 160 is woken up by the command reception unit 140 (steps S301 and S302 / Y), the execution control unit 160 checks whether there is a command in the execution waiting queue 150 (step S303).

  If there is no command in step S303 (step S303 / N), the processing from step S301 is repeated.

  On the other hand, if there is a command in step S303 (step S303 / Y), the execution control unit 160 determines whether or not the execution counter 261 is less than the maximum command number 243 (step S304).

  In step S304, when the maximum number of commands is less than 243 (step S304 / Y), the execution control unit 160 increments the execution counter 261 (step S305). Then, the execution control unit 160 acquires one command from the execution waiting queue 150 (step S306), and instructs the processing unit 170 to execute the command (step S307).

  Thereafter, the processing from step S303 is repeated.

  On the other hand, if the maximum number of commands is 243 or more in step S304 (step S304 / N), the execution control unit 160 sets the background processing time 263 in the sleep timer 120 and interrupts the command execution instruction to the processing unit 170. (Sleep).

  As a result, when the number of commands executed in the command count cycle reaches the maximum command number 243, background processing is executed in the processing unit 170.

  When the execution control unit 160 gets up from the sleep timer 120 (steps S301, S302 / N, S309 / N), the execution control unit 160 resets the execution counter 261 (step S312), and executes the processing from step S303.

  Thereby, in the processing unit 170, after the background process is executed, it is possible to execute a command exceeding the maximum command number 243.

  Further, when the execution control unit 160 gets up from the interval timer 110 (steps S301, S302 / N, S309 / Y), the execution control unit 160 increments the control counter 262 (step S310). Then, the execution control unit 160 determines whether or not the command count cycle has elapsed based on the control counter 262 (step S311).

  Here, the length of the command count cycle is specified by, for example, the number of intervals x (x is an integer of 1 or more, for example). In this case, the execution control unit 160 determines that the command count cycle has elapsed when the control counter 262 indicates an integral multiple of x.

  In step S311, when the command count cycle has elapsed (step S311 / Y), the execution control unit 160 resets the execution counter 261 (step S312), and executes the processing from step S303.

  As a result, the execution counter 261 is reset every command count cycle.

  On the other hand, if the command count cycle has not elapsed in step S311 (step S311 / N), the processing from step S301 is repeated.

  Next, command execution processing in the embodiment of the present invention will be described.

  FIG. 8 is a flowchart showing command execution processing in the embodiment of the present invention.

  The processing unit 170 is woken up by a command execution instruction from the execution control unit 160 (step S401), and executes processing related to the command (exclusive control processing) (step S402). Here, the processing unit 170 executes, for example, access (read / write) to the data on the resource 400 specified by the command so that simultaneous access from the plurality of hosts 300 to the same data does not occur.

  The processing unit 170 determines whether the command needs to be executed by another exclusive control device 100 (step S403).

  When it is necessary to execute in step S403 (step S403 / Y), the processing unit 170 queues the command in the execution waiting queue 150 of the other exclusive control device 100 (step S404).

  The processing unit 170 transmits the processing result of the executed command to the host 300 (step S405). Here, for example, the processing unit 170 transmits an access result (read data / write result) to data on the resource 400 to the host 300.

  Thereafter, the processing from step S401 is repeated and executed.

  Next, a specific example of the operation of the embodiment of the present invention will be described.

  FIGS. 13 to 15 are diagrams illustrating execution examples of processing related to commands and background processing according to the embodiment of the present invention.

  Here, the weight table storage unit 142 is set with the weight table 242 of FIG. 10, the default command number storage unit 144 is set with the default command number 244 of FIG. 11, and the weight threshold storage unit 145 is set with the weight threshold value 245 of FIG. Assuming that The length of the command count cycle is 10 intervals (x = 10), the number of weight accumulation counters in the aggregation table 232 is 4 (n = 4), and the length of the total weight period is 2 intervals (m = 2). Assume that

  Also, the time required for processing the commands “B” and “C” in the weight table 242 in FIG. 10 (the time that occupies the CPU) is twice as long as the time required for processing the command “A”. Assume that it is double. Furthermore, it is assumed that the background processing time 263 is set to 6 times the time necessary for processing the command “A”.

  Also here. An interval where the control counter 262 indicates “j” is described as an interval “j”.

  As illustrated in FIGS. 13 to 15, the execution control unit 160 increments the control counter 262 for each interval. Further, the execution control unit 160 resets the execution counter 261 every command count cycle (when the value of the control counter 262 is a multiple of “10” (10, 20,...)). The aggregation control unit 130 increments the current index 231 in the range of “0” to “3” for each interval.

  The command receiving unit 140 queues the commands (“A”, “B”, “C”) received from the host 300 in the execution waiting queue 150. Here, the command number control unit 141 assigns the weight (“1”, “2”, “3”) for the command (“A”, “B”, “C”) to the current index 231 for each interval. Is added to the weight accumulation counter (index “0” to “3”). Further, the command number control unit 141 calculates the total value of the weight accumulation counters of the two preceding intervals from the interval before the current interval.

  When the total value of the weight accumulation counter is less than the weight threshold value 245 “6”, the command number control unit 141 sets the default command number 244 “18” as the maximum command number 243. When the total value of the weight accumulation counter is equal to or greater than the weight threshold 245 “6”, the command number control unit 141 sets “9”, which is half the default command number 244, to the maximum command number 243.

  For example, in the first command count cycle (FIG. 13, intervals “0” to “9”), commands “A” and “B” with small weights are sporadically received from the host 300. In this case, since the total value of the weight accumulation counter calculated in each interval is less than “6”, “18” is set as the maximum command number 243.

  Also, in the next command count cycle (FIG. 14, intervals “10” to “19”), the command “A” having a small weight is received from the host 300 in a concentrated manner. Also in this case, since the total value of the weight accumulation counter calculated in each interval is less than “6”, “18” is set to the maximum command number 243.

  Furthermore, in the next command count cycle (FIG. 15, intervals “20” to “29”), a command “C” having a small weight is continuously received from the host 300. In this case, since the total value “6” of the weight accumulation counter is calculated in the intervals “25” and “26”, the maximum command number 243 is limited to “9”.

  If the value of the execution counter 261 is less than the maximum command number 243 (“18” or “9”), the execution control unit 160 instructs the processing unit 170 to execute the command queued in the execution queue 150. The execution counter 261 is incremented. If the value of the execution counter 261 is equal to or greater than the maximum command number 243 (“18” or “9”), the execution control unit 160 interrupts the command execution instruction to the processing unit 170 during the background processing time 263. To do. If there is no command instructed by the execution control unit 160, the processing unit 170 executes background processing.

  For example, in the first command count cycle (interval “0” to “9” in FIG. 13), the value of the execution counter 261 has not reached “18”, so the execution instruction of each command is not interrupted. In the processing unit 170, processing related to each command is executed, and at the timing when there is no command, a time required for background processing (background processing time 263) is secured, and background processing is executed.

  In the next command count cycle (FIG. 14, intervals “10” to “19”), the value of the execution counter 261 reaches “18” at time “t1” of the interval “17”. For this reason, during the background processing time 263 from time “t1” to “t2”, the command execution instruction to the processing unit 170 is interrupted. As a result, the processing unit 170 secures the background processing time 263 between the timing when there is no command before the time “t1” and the time “t1” to “t2”, and the background processing is executed. . Then, at time “t2” in the interval “19”, the command execution instruction to the processing unit 170 is resumed.

  In the next command count cycle (FIG. 15, intervals “20” to “29”), the value of the execution counter 261 reaches the limited value “9” at the time “t3” of the interval “26”. Yes. For this reason, the command execution instruction to the processing unit 170 is interrupted during the background processing time 263 from time “t3” to “t4”. As a result, the processing unit 170 secures the background processing time 263 between the timing when there is no command before the time “t3” and the time “t3” to “t4”, and the background processing is executed. . Then, at time “t4” of the interval “28”, the command execution instruction to the processing unit 170 is resumed.

  Thus, the operation of the embodiment of the present invention is completed.

  In the embodiment of the present invention, when the total value of the weight accumulation counter is equal to or greater than the weight threshold value 245, the maximum command number 243 is smaller than the default command number 244 in order to limit the number of commands to be executed. A value was set. However, the present invention is not limited to this, and instead of changing the maximum command number 243, the value added to the execution counter 261 when the command is executed may be changed. In this case, for example, if the total value is greater than or equal to the weight threshold value 245 in step S205 described above, the command number control unit 141 sets 2 to the count coefficient in step S206. If the total value is less than the weight threshold 245 in step S205 described above, the command number control unit 141 sets 1 to the count coefficient in step S206. In step S305 described above, the execution control unit 160 adds the count coefficient to the execution counter 261.

  In the embodiment of the present invention, when the total value of the weight accumulation counter is equal to or greater than the weight threshold value 245, the maximum command number 243 is set to a value half of the default command number 244. However, the present invention is not limited to this, and the number of commands corresponding to a plurality of levels set for the total value range may be set as the maximum command number 243.

  Next, a characteristic configuration of the embodiment of the present invention will be described. FIG. 1 is a block diagram showing a characteristic configuration of an embodiment of the present invention.

  The exclusive control device 100 (information processing device) includes an execution control unit 160 and a command number control unit 141 (processing number control unit). The execution control unit 160 is requested so that the number of commands (processing) executed by the processing unit 170 for each command count cycle (cycle of a predetermined length) is equal to or less than the maximum command number 243 (maximum processing number). Causes the processing unit 170 to execute a command (processing). The command number control unit 141 sets the maximum command number 243 (maximum processing number) according to the accumulated value of the weight of the requested command (processing).

  According to the embodiment of the present invention, it is possible to prevent the background process from being stopped even when a plurality of types of commands are executed. The reason is that the command number control unit 141 sets the maximum command number 243 according to the accumulated value of the requested command weights.

  Thus, for example, even when commands having a small number of commands but having a high CPU occupancy are generated continuously during a certain period, the number of commands to be executed is limited, and background processing can be executed.

  Also, as shown in FIG. 16, in the technique for limiting the number of commands executed for each cycle, when commands occur frequently in a certain cycle and the command execution is interrupted, the TAT (Turn Around Time) of the interrupted command is interrupted. ) Increases (extends).

  According to the embodiment of the present invention, it is possible to prevent an increase in TAT of a command whose execution has been interrupted. The reason is that, even when the number of executed commands reaches the maximum command number 243, the interrupted command is executed by the processing unit 170 after the background processing time 263 has elapsed.

  As a result, even if the number of executed commands reaches the upper limit in a certain cycle, the program is interrupted at the remaining time of the cycle after the background processing is completed without waiting for the start of the next cycle as shown in FIG. Command can be executed. For this reason, the increase in the TAT of the interrupted command is minimized.

  Further, according to the embodiment of the present invention, in recovery accompanying a failure of an exclusive control device performed in a system that distributes processing using a plurality of exclusive control devices, recovery start and end notifications from the host Therefore, no countermeasure is required to prevent malfunction in the exclusive control device. The reason is that the limitation on the maximum command number 243 when a command having a high CPU occupancy rate (high weight) is continuously issued in the recovery, and the limitation release on the maximum command number 243 after the recovery ends are the number of commands. This is because it is dynamically executed by the control unit 141.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  For example, in the embodiment of the present invention, the case where a plurality of exclusive control devices 100 included in the exclusive control system 1 perform exclusive control related to access from the host 300 to the resource 400 has been described as an example. However, if the exclusive control device 100 is a device that performs a plurality of types of commands and background processing, the exclusive control system 1 may be configured by a single exclusive control device 100.

  In the embodiment of the present invention, the case where the information processing apparatus is the exclusive control apparatus 100 that performs exclusive control related to access from the host 300 to the resource 400 has been described as an example. However, the information processing apparatus may be an apparatus other than the exclusive control apparatus 100 as long as the apparatus performs a plurality of types of processing and background processing according to the received command and the generated event.

DESCRIPTION OF SYMBOLS 1 Exclusive control system 100 Exclusive control apparatus 101 CPU
DESCRIPTION OF SYMBOLS 102 Memory | storage means 103 Communication means 104 Input means 105 Output means 110 Interval timer 120 Sleep timer 130 Total control part 131 Index memory | storage part 132 Total table memory | storage part 140 Command receiving part 141 Command number control part 142 Weight table memory | storage part 143 Maximum command number memory | storage Unit 144 default command number storage unit 145 weight threshold value storage unit 150 execution waiting queue 160 execution control unit 161 execution counter storage unit 162 control counter storage unit 163 background processing time storage unit 170 processing unit 231 current index 232 aggregation table 242 weight table 243 Maximum number of commands 244 Default number of commands 245 Weight threshold 261 Execution counter 262 Control counter 263 Background processing time 3 0 host 400 resources

Claims (10)

Execution control means for instructing the processing means to execute the requested processing so that the number of processes per cycle of a predetermined length executed by the processing means is equal to or less than the maximum number of processes;
A processing number control means for setting the maximum processing number according to a cumulative value of the requested processing weights;
An information processing apparatus comprising: When the cumulative value in a predetermined period before the present is equal to or greater than a predetermined threshold, the processing number setting means sets the maximum processing number to a value smaller than the maximum processing number when the cumulative value is less than the predetermined threshold. Set,
The information processing apparatus according to claim 1. The weight is set so that the weight of the processing with a long processing time is larger than the processing with a short processing time.
The information processing apparatus according to claim 1 or 2. The execution control means is a time required to complete a predetermined background process when the number of processes executed by the processing means becomes equal to the maximum number of processes in each of the predetermined length cycles. During which the execution instruction to the processing means for the requested processing is interrupted,
The processing means performs a predetermined background process when there is no processing instructed to be executed by the processing means.
The information processing apparatus according to claim 1. The execution control means, after a lapse of time necessary to complete the predetermined background processing, the number of processes executed by the processing means for each cycle of the predetermined length exceeds the maximum processing number, Instructing the processing means to execute the requested processing;
The information processing apparatus according to claim 4. Set the maximum number of processes according to the accumulated value of the requested process weight,
Instructing the processing means to execute the requested process so that the number of processes per period of a predetermined length executed by the processing means is equal to or less than the maximum processing number;
Information processing method. When setting the maximum number of processes, if the cumulative value in a predetermined period before the present is greater than or equal to a predetermined threshold, the maximum number of processes is smaller than the maximum number of processes when the cumulative value is less than a predetermined threshold. Set the value,
The information processing method according to claim 6. The weight is set so that the weight of the processing with a long processing time is larger than the processing with a short processing time.
The information processing method according to claim 6 or 7. In the processing means, when there is no processing instructed to execute, a predetermined background processing is performed,
In each of the predetermined length cycles, when the number of processes executed by the processing means is equal to the maximum number of processes, the requested process for the time required to complete the predetermined background process Interrupting the execution instruction to the processing means,
The information processing method according to claim 6. On the computer,
Set the maximum number of processes according to the accumulated value of the requested process weight,
Instructing the processing means to execute the requested process so that the number of processes per period of a predetermined length executed by the processing means is equal to or less than the maximum processing number;
A program that executes processing.

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