KR101036275B1 - Performance monitoring unit and method of estimating power consumption of a system using the performance monitoring unit - Google Patents

Abstract

Disclosed is a method for estimating power consumption of a system using a motion monitoring unit and a motion monitoring unit. A method for estimating power consumed in a system including a CPU and a device by using a performance monitoring unit (PMU) connected to an on-chip bus, the CPU on the on-chip bus And monitoring the command signals interchanged between the devices, the command signals comprising identification information identifying the device or CPU to which the command signals are conveyed; And calculating a unit power consumption value when the operation according to the command signal is performed in the device or the CPU using the power consumption value for each command signal according to the identification information and the command signal. This greatly reduces the error in the estimation of the power consumed in the system, enabling accurate estimation of the power consumed in the system.

PMU, consumption, power, estimation, on-chip bus

Description

Performance monitoring unit and method of estimating power consumption of a system using the performance monitoring unit}

The present invention relates to an operation monitoring unit and a method for estimating power consumption of a system using the operation monitoring unit.

Recently, with the rapid development of computer and semiconductor related technologies, miniaturization and portableization of electronic devices, especially personal computers, are rapidly progressing. In addition, increasing the processing speed of the microprocessor and lowering power consumption have emerged as important tasks. In order to solve the problem of low power consumption, it is first necessary to accurately estimate power consumption when designing a system. As such, power consumption estimation is one of the most important considerations in designing a digital system as much as measurement of the operations performed in the system.

In the conventional case, the power consumption of the system was estimated through a performance monitoring unit (PMU) included in the CPU. In this way, the power consumption estimation method of the system through the operation monitoring unit included in the CPU estimates the power consumed in the system through the command signal entering and exiting the CPU. That is, when a command signal is transmitted from the CPU to various devices, the number of the command signals is counted, and the power consumption of the system is estimated using the value of power consumption according to the pre-stored command signal.

However, this method estimates the power consumption by analyzing the command signal by an operation monitoring unit located inside the CPU. Therefore, when each device performs a specific operation without the help of the CPU, the power consumed by the operation is estimated. It was difficult to make an accurate estimate because the value could not be estimated.

In addition, when a command signal is transmitted from the CPU to various devices, even if the command signal is configured to perform the same operation, the value of power consumed may not be reflected because different power values are consumed according to the type of the device to which the command signal is transmitted. It was difficult to make an accurate estimate because it could not be estimated. Since power consumption is measured based on the operation according to the command signal, it is impossible to accurately measure the power consumption because no consideration is given to which device the command signal is transmitted to.

Even in the case where the same command signal is transmitted to the same device in an actual system, the value of power consumed may be different according to the order in which the command signal is transmitted to the device. Even if the same command signal is transmitted, the value of power consumed varies depending on the state of the device. However, the conventional method for estimating system power consumption using an operation monitoring unit included in the CPU cannot reflect the device state, and thus, there is a problem that accurate power consumption cannot be measured.

It is an object of the present invention to provide a method for estimating power consumed in a system via an operation monitoring unit connected to an on-chip bus and an operation monitoring unit for performing the method.

In addition, another object of the present invention is to estimate the power consumption of the system, which can measure the power consumption of the system more accurately by using the results of the system power consumption by virtually simulating the operation of the actual device It is to provide an operation monitoring unit to perform.

According to an aspect of the present invention, in a method for estimating the power consumed in a system including a CPU and a device (PMU) connected to an on-chip bus (PMU) Monitoring command signals interchanged between the CPU and the device on the on-chip bus, the command signals comprising identification information identifying a device or CPU to which the command signal is passed; And when the operation according to the command signal is performed in the device or the CPU using the identification information included in the monitored command signal and a power value for each command signal stored in advance according to the type of the command signal. A method of estimating power consumption of a system is provided that includes calculating a unit power consumption value consumed.

In this case, the calculating of the unit power consumption value may be performed when the device or CPU to which the command signal is transmitted performs an operation according to the command signal by using the identification information included in the command signal. Generating state information indicating a state of a device or the CPU or state transition information indicating a unit operation to be processed when performing an operation according to the command signal; And a unit consumed when an operation according to the command signal is performed in the device or the CPU by using a static power consumption value corresponding to the state information previously stored and a dynamic power consumption value corresponding to the state transition information. The method may include calculating a power consumption value, wherein the command signal is plural, and calculating the unit power consumption value is calculated for each of the plurality of command signals, and is calculated for each of the plurality of command signals. The method may further include calculating a system power consumption value consumed by the system by summing all the unit power consumption values.

The command signal may include a plurality of command signals, and the calculating of the unit power consumption value may include the device to which the command signal is transmitted, using the identification information included in the command signal, for each of the plurality of command signals; When the CPU performs the operation according to the command signal, generating state information indicating the state of the device or the CPU passing through or the state transition information indicating the unit operation to be processed when performing the operation according to the command signal step; And counting the time of staying in the state for each of the generated state information and the number of the state transition information for each state transition information, wherein the static power consumption value corresponding to the state information stored in advance is stored. Using the dynamic power value corresponding to the state transition information stored in advance, the time to stay in the state, and the number of the state transition information, when the operation according to the plurality of command signals is performed in the system. The method may further include calculating a system power consumption value.

The state information or the state transition information generated with respect to one command signal may be plural, and the generating of the state information and the state transition information may be performed by the CPU or the device to which the command signal is transmitted. The state information or the state transition information may be generated by virtually simulating the operation according to the command signal.

In addition, after monitoring the command signal, the method may further include parsing the command signal, and the device may be a memory device.

In addition, according to another aspect of the present invention, in a performance monitoring unit (PMU) for estimating power consumption of a system including a CPU, a device, and an on-chip bus, connected to the on-chip bus And on command signals exchanged between the CPU and the device on the on-chip bus, the command signals comprising identification information identifying the device or CPU to which the command signal is delivered. Chip bus interface; A storage unit storing power consumption value of each command signal consumed by the device or the CPU corresponding to the command signal; The operation monitoring unit includes a control unit that calculates a unit power consumption value when an operation corresponding to the command signal is performed in the device or the CPU by using the command signal and power consumption value for each command signal. do.

The command signal may include a plurality of command signals, and the controller may include: a unit power consumption calculator configured to calculate the unit power consumption value for each of the plurality of command signals; And a system power consumption calculator configured to calculate a system power consumption value consumed by the system by summing all the unit power consumption values corresponding to each of the plurality of command signals.

The controller may be further configured to determine a state of the device or the CPU through which the device or the CPU to which the command signal is transmitted performs an operation according to the command signal by using the identification information included in the command signal. An information generation unit for generating state transition information indicating unit information to be processed when performing an operation according to the state information indicating or the command signal; And a unit power consumption calculator configured to calculate a unit power consumption value using the state information, the state transition information, a static power consumption value corresponding to the state information, and a dynamic power consumption value corresponding to the state transition information. The storage unit may store the static power consumption value and the dynamic power consumption value.

The command power is plural, and the unit power consumption calculation unit calculates the unit power consumption value for each of the plurality of command signals, and the control unit calculates the unit power consumption calculated for each of the plurality of command signals. The apparatus may further include a system power consumption calculator configured to add up all values to calculate a system power consumption value consumed by the system.

The command signal may be plural, and the control unit may be configured such that the device or the CPU, to which the command signal is transmitted using the identification information included in the command signal, for each of the plurality of command signals, the command signal. An information generation unit for generating state transition information indicating a state of the device or the CPU to be processed or state transition information indicating a unit operation to be processed when performing an operation according to the command signal; A counter for counting a time of staying in the state for each state information and the number of state transition information for each state transition information; And operation according to the plurality of command signals by using the static power consumption value corresponding to the state information, the dynamic power consumption value corresponding to the state transition information, the number of the state information, and the number of the state transition information. The system may include a system power consumption calculator configured to calculate a system power consumption value that is consumed when the system is executed. The storage unit may store the static power consumption value and the dynamic power consumption value.

Here, the state information or the state transition information generated for the one command signal may be a plurality, and the information generation unit may perform an operation according to the command signal by the CPU or the device to which the command signal is transmitted. The virtual information may be simulated to generate the state information or the state transition information.

The apparatus may further include a parser for converting the command signal into a form that may be processed by the motion monitoring unit, and the device may be a memory device.

Further, according to another aspect of the present invention, in a system including a CPU, a device, and a performance monitoring unit (PMU) connected to an on-chip bus, the operation monitoring unit, the on-chip bus A command signal coupled to the CPU and the device on the on-chip bus, the command signal comprising identification information identifying the device or the CPU to which the command signal is passed. And an on-chip bus interface, wherein the CPU is configured to consume power when an operation corresponding to the command signal is performed in the device or the CPU by using the command signal, the identification information, and power consumption value for each command signal. Provided is a system for power consumption estimation, comprising a control unit for calculating a unit power consumption value .

Here, the command signal is plural, and the control unit includes: a unit power consumption calculator configured to calculate the unit power consumption value for each of the plurality of command signals; And a system power consumption calculator configured to calculate a system power consumption value consumed by the system by summing all the unit power consumption values corresponding to each of the plurality of command signals, wherein the operation monitoring unit includes the identification information. When the device or CPU to which the command signal is transmitted performs an operation according to the command signal, processing is performed when the device according to the command signal or status information indicating the state of the device or the CPU to be passed or an operation according to the command signal are performed. The apparatus may further include an information generation unit configured to generate state transition information indicating a unit operation. The controller may further include dynamic state corresponding to the state information, the state transition information, the static power consumption value corresponding to the state information, and the state transition information. Unit consumption that calculates the unit power consumption value using the power consumption value It may include a power calculator.

In addition, the command signal is plural, and the unit power consumption calculation unit calculates the unit power consumption value for each of the plurality of command signals, and the control unit calculates the unit power consumption calculated for each of the plurality of command signals. The apparatus further includes a system power consumption calculation unit configured to add up all values to calculate a system power consumption value consumed in the system, or the command signal is plural, and the motion monitoring unit identifies the identification of each of the plurality of command signals. When the device or the CPU to which the command signal is transmitted using the information performs an operation according to the command signal, state information indicating a state of the device or the CPU passing through the command signal or the CPU may perform an operation according to the command signal. To generate state transition information indicating the unit of action An information generating unit; And a counter for counting the number of the state transition information for each state transition information and the time for which the device or the CPU stays in the state for each state information, wherein the controller is configured to generate a static power consumption value corresponding to the state information. A system power consumption value consumed when an operation according to the plurality of command signals is performed in the system by using a dynamic power consumption value corresponding to the state transition information, a time of staying in the state, and a number of the state transition information. It may include a system power consumption calculator for calculating the.

The state information or the state transition information generated by the information generator for one command signal may be plural, and the information generator may be configured by the CPU or the device to which the command signal is transmitted to the command signal. Virtual state simulation may be performed to generate the state information or the state transition information.

The motion monitoring unit may further include a parser for parsing the command signal in a form that may be processed by the motion monitoring unit, and the device may be a memory device.

According to an embodiment of the present invention, there is provided a method of estimating power consumed in a system through an operation monitoring unit connected to an on-chip bus and estimating power consumption through an operation monitoring unit performing the method, thereby determining the amount of power consumed in the system. This greatly reduces the error in estimation, allowing accurate estimation of the power consumed in the system.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

When referred to herein as being "input" or "delivered" from one component to another component, it may be directly input to or passed directly to the other component, but may be input through another component in the middle Or may be communicated. On the other hand, when it is referred to as "directly input" or "directly transmitted" from one component to another, it should be understood that it does not go through other components in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, a structure of a system including a performance monitoring unit (PMU) according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is an exemplary diagram illustrating a structure of a system including a performance monitoring unit (PMU) according to an embodiment of the present invention.

The system according to the present embodiment includes a plurality of devices (401, 402, 403, ..., 40n, hereinafter referred to as 400), an on chip bus 200, a CPU 300, and an operation monitoring unit ( PMU: Performance Monitoring Unit, 100).

As shown in FIG. 1, the on-chip bus 200 included in the system according to the present exemplary embodiment is a common path through which command signals are interchanged between the CPU 300 and the plurality of devices 400. That is, command signals are interchanged between the CPU 300 and the device 400 on the on-chip bus 200 or between each device 400.

In addition, the operation monitoring unit 100 connected to the on-chip bus 200 according to the present exemplary embodiment monitors the command signals exchanged on the on-chip bus 200, thereby providing a plurality of devices 400. Alternatively, the power consumed by the CPU 300 may be estimated.

The motion monitoring unit included in the conventional CPU 300 may also estimate power consumed by the system. However, since the motion monitoring unit included in the CPU 300 is included in the CPU 300, the power monitoring unit estimates power based only on a command signal transmitted from the CPU 300. The error was large in the estimated value of power consumed by the system. This means that, in addition to the power consumed as the operation according to the command signal transmitted from the CPU 300 is performed among the power consumed in the system, the power consumed by the operation according to the command signal transmitted between the devices 400 is performed and specified. This is because each device 400 basically consumes power while staying in a certain state even without performing an operation.

In the conventional system, the operation monitoring unit 100 is included in the CPU 300, but the operation monitoring unit 100 according to the present embodiment may include an external on-chip bus of the CPU 300 as illustrated in FIG. 1. 200 may be included in the system. Of course, the system according to the present exemplary embodiment may further include an operation monitoring unit included in the CPU 300 in addition to the operation monitoring unit 100 connected to the on-chip bus 200 outside the CPU 300. As described above, the power consumed by the CPU 300 may be estimated using the operation monitoring unit included in the CPU 300.

The plurality of devices 400 illustrated in FIG. 1 may be various memory devices, and various devices may be included within the scope of the present invention, such as DDR SDRAM, NOR Flash, and NAND Flash.

As described above, the operation monitoring unit according to the present embodiment is connected to the on-chip bus 200 outside the CPU 300, as shown in FIG. The power value can be estimated.

Hereinafter, a principle of estimating a power value consumed by a system by the operation monitoring unit according to the present embodiment will be described with reference to FIGS. 2A and 2B through the structure of the operation monitoring unit according to the present invention.

First, FIG. 2A is a structural diagram illustrating a structure of a motion monitoring unit (PMU) according to an embodiment of the present invention.

As shown in FIG. 2A, the operation monitoring unit 100 according to the present embodiment includes an on chip bus interface 110, a parser 120, and a controller 140. In this case, the controller 140 may include a counter 141, an information generator 142, a system power consumption calculator 143, and a unit power consumption calculator 144.

The control unit 140 according to the first embodiment of the present invention includes a unit power consumption calculation unit 144 and a system power consumption calculation unit 143, and the control unit 140 according to the second embodiment calculates the unit power consumption. A controller 144, a system power consumption calculator 143, and an information generator 142. The controller 140 according to the third embodiment of the present invention includes a system power consumption calculator 143 and an information generator. 142 and counter 141.

The on chip bus interface 110 is connected to the on chip bus 200 and monitors command signals exchanged between the CPU and the devices on the on chip bus 200. That is, command signals exchanged between the CPU and the device on the on-chip bus are monitored and input to the operation monitoring unit 100.

In this case, the command signal monitored by the on-chip bus interface 110 includes identification information identifying a device or a CPU to which the command signal is transmitted. According to the present embodiment, the identification information may include type information of a device or a CPU to which the command signal is transmitted.

The command signal according to the present embodiment may include any device that instructs the performance of a specific operation within the scope of the present invention, such as a device selection signal and a read / write signal, and may include a device offset address, a burst, or a single connection ( single access) may include information about the identifier, the length of the burst, and the like.

The motion monitoring unit 100 according to the present embodiment may include a parser 120. The parser 120 parses the command signal monitored by the on-chip bus interface 110 into a form that can be processed by the motion monitoring unit 100, thereby rapidly estimating the system power consumption of the motion monitoring unit 100 at a higher speed. Help to deal with

As described above, since the command signal includes identification information for identifying the device or the CPU, the controller 140 uses the on-chip bus interface 110 by using the power consumption value for each command signal stored for each command signal. ) Can calculate the value of the unit power consumed when the device or CPU performs the operation according to the command signal monitored in).

For example, when the on-chip bus interface 110 monitors a first command signal transmitted to the first device to instruct the first device to perform a 'WRITE' operation, the controller 140 may control the first command signal. Information on the power consumed when the operation according to the present invention is performed, that is, a power consumption value corresponding to the first command signal. In addition, the controller 140 may calculate the unit power consumption consumed when the first command signal is transmitted to the first device to perform the 'WRITE' operation.

In this case, the controller 140 uses identification information identifying a device or a CPU to which the command signal is transmitted, so that even if the command signal is a command signal for performing the same 'WRITE' operation, what is the device or CPU to which the command signal is transmitted? By reflecting this, different unit power consumption values can be calculated accordingly.

As described above, the control unit 140 according to the present embodiment calculates the unit power consumption value using the identification information, and thus the unit consumed according to the type of the CPU or device to which the command signal is transmitted and the operation performed according to the command signal. It is possible to accurately reflect the power consumption tendency of the system in which the value of power consumption is different. Accordingly, the power consumption value estimation of the system using the operation monitoring unit according to the present embodiment can be more accurate.

As described above, the controller 140 calculates a unit power consumption value when the operation corresponding to the command signal is performed in the device or the CPU using the command signal and the power consumption value for each command signal.

At this time, according to the first embodiment, the control unit 140 according to the first embodiment, the unit power consumption calculation unit 144 and the system power consumption calculation unit 143, according to the second embodiment, the unit power consumption calculation unit ( 144, the system power consumption calculator 143 and the information generator 142, according to the third embodiment, may include an information generator 142, a system power consumption calculator 143, and a counter 141. Can be.

First, the configuration of the controller 140 according to the first embodiment will be described.

The unit power consumption calculator 144 included in the controller 140 according to the first embodiment calculates the unit power consumption consumed by the device or CPU to which the command signal is transmitted when an operation according to the command signal is performed. When there are a plurality of command signals monitored by the chip bus interface 110, a unit power consumption value is calculated for each of the plurality of command signals.

In addition, the system power consumption calculator 143 included in the controller 140 according to the first exemplary embodiment calculates a system power consumption value consumed by the system by summing all unit power values corresponding to each of the plurality of command signals. do.

That is, according to the first embodiment, the unit power consumption calculation unit 144 calculates a unit power consumption value consumed when an operation according to the command signal is performed for each of the monitored command signals, and the system power consumption is calculated. The calculator 143 calculates a system power consumption by adding unit power consumption values corresponding to the plurality of command signals thus calculated.

The operation monitoring unit 100 according to the first embodiment monitors all of the command signals exchanged on the on-chip bus of the system on the on-chip bus interface 110, so that the unit power consumption calculator 144 may respectively command the command signals. The unit power consumption value may be calculated, and the system power consumption calculation unit 143 may estimate the value of power consumed by the system 100 by adding up all of them.

Next, the configuration of the controller 140 according to the second embodiment will be described.

As described above, the controller 140 according to the second exemplary embodiment may include a unit power consumption calculator 144, an information generator 142, and a system power consumption calculator 143.

The information generating unit 142 according to the second embodiment of the present invention uses the identification information included in the command signal to determine whether the device or CPU to which the command signal is transmitted performs an operation according to the command signal. State transition information indicating a unit operation to be processed when performing an operation according to the state information or the command signal indicating the state is generated.

The information generating unit 142 distinguishes the device or the CPU to which the command signal is to be transmitted by using the identification information included in the command signal. It generates state information indicating the state to be passed when performing and state transition information indicating the unit operation to be processed when performing the operation according to the command signal.

In this case, the information generating unit 142 virtually simulates that the CPU or the device to which the command signal is transmitted performs an operation according to the command signal to generate state information or state transition information.

That is, the information generating unit 142 distinguishes the device or the CPU to which the command signal is to be transmitted by using the identification information included in the command signal, and the device or CPU to which the command signal is transmitted actually performs an operation according to the command signal. You will simulate the same process as you do. When the operation according to the command signal is actually performed through the virtual simulation process, state information on the state through which the device or the CPU passes or state transition information indicating the unit operation processed by the device or the CPU is generated. The information generator 142 may be an energy state machine.

For example, assume a first command signal transmitted to the first device to perform a 'WRITE' operation. The information generator 142 recognizes that the first command signal is a command signal transmitted to the first device by using the identification information included in the first command signal. The information generator 142 virtually simulates a process in which the first device performs an operation according to the first command signal. Through this process, the information generating unit 142 may provide the state information on the state to be passed as the operation according to the first command signal is performed and the information about the unit operation to be processed when the operation according to the first command signal is performed. Can be generated. As described above, according to the present exemplary embodiment, the information generating unit 142 virtually simulates the case in which the operation according to the command signal is performed to generate the state transition information and the state information, thereby performing the operation even if the same operation is performed. The value of power consumption can be accurately estimated by reflecting the tendency of power consumption of the actual system, which varies depending on the device or CPU state at the time.

For example, when the first command signal is performed in the first device in the first state, the first device may be configured through the "first state-> first unit operation-> second state-> second unit operation". Assume that the 'WRITE' operation according to the first command signal is performed. The first device in the first state is in the second state by performing the first unit operation, and the 'WRITE' according to the first command signal is performed by the first device in the second state performing the second unit operation. The first device performs the operation. At this time, the information generating unit 142 generates state information indicating the first state and the second state and state transition information indicating the first unit operation and the second unit operation. As such, the state information or the state transition information generated for one command signal may be plural. The process of generating the state information and the state transition information of the information generator 142 will be described in more detail with reference to FIGS. 5 to 8.

The unit power consumption calculator 144 calculates a unit power consumption value using state information, state transition information, a static power consumption value corresponding to the state information, and a dynamic power consumption value corresponding to the state transition information. Calculate.

The unit power consumption calculator 144 may use the static power consumption value according to the state information generated by the information generator 142 and the dynamic power consumption value according to the state transition information generated by the information generator 142. The signal is transmitted to calculate the power value consumed when the operation according to the command signal is performed.

Referring to the above example, the power consumed by the first device when in the first state is a first static power consumption value, and the power consumed by the first device when in the second state is Second static power consumption value. In addition, the power consumed by the first device by performing the first unit operation is the first dynamic power consumption value, and the power consumed by the first device by performing the second unit operation is the second dynamic power consumption value. to be. Therefore, the unit power consumption calculation unit 144 according to the first command signal through the process of "first static power consumption value + second static power consumption value + first dynamic power consumption value + second dynamic power consumption value". The unit power consumption value consumed when the operation is performed in the first device is calculated.

When the on-chip bus interface 110 monitors a plurality of command signals, the unit power consumption calculator 144 calculates a unit power consumption value through the above-described process for each of the plurality of command signals. The system power consumption calculator 143 calculates a system power consumption value consumed by a system including a plurality of devices and a CPU by summing all the unit power values calculated for each of the plurality of command signals.

Finally, the configuration of the controller 140 according to the third embodiment will be described.

As described above, the controller 140 according to the third exemplary embodiment may include a system power consumption calculator 143, an information generator 142, and a counter 141.

Since the information generating unit 142 according to the third embodiment has the same configuration as the information generating unit 142 according to the second embodiment, the information generating unit 142 will be briefly described in order to avoid overlapping descriptions. The information generating unit 142 according to the third embodiment is a device or a CPU to which a command signal is transmitted using identification information included in the command signal in the same manner as the information generating unit 142 according to the second embodiment, When performing the operation according to the command signal, the state information indicating the state of the device or CPU passing through, or the state transition information indicating the unit operation to process when performing the operation according to the command signal is generated.

The information generator 142 distinguishes which device or CPU the command signal is transmitted to using the identification information included in the command signal, and the device or CPU to which the command signal is transmitted actually performs an operation according to the command signal. We simulate virtually the same process. When the operation according to the command signal is actually performed through the virtual simulation process, state information on the state through which the device or the CPU passes or state transition information indicating the unit operation processed by the device or the CPU is generated. The information generator 142 may be an energy state machine.

In this case, when there are a plurality of command signals monitored by the on-chip bus interface 110, the information generator 142 generates state information or state transition information for each of the plurality of command signals.

The information generating unit 142 generates state information and state transition information corresponding to the command signal. In this case, there is no state transition information corresponding to the command signal, and thus only state information may be generated.

For example, in the case of the first command signal described above, state information indicating the first state and the second state and state transition information indicating the first unit operation and the second unit operation are generated. For the second command signal, state information about the state to be passed when the second command signal is performed and state transition information indicating the unit operation performed when the second command signal is performed are generated. In this case, the second command signal is also transmitted to the first device, and the state information generated with respect to the second command signal is state information indicating the second state, and the state transition information includes the first unit operation, the second unit operation, and the third. Operation information indicating unit operation. The information generator 142 generates state information indicating the first state and the second state and first state transition information indicating the first unit operation, with respect to the third command signal to be transmitted to the second device.

In this case, the state information or the state transition information generated for each of the plurality of command signals may be different depending on the device or the CPU to which the command signal is to be transmitted, even if the command signal is configured to perform the same operation. Even if the same command signal is transmitted to the same device or CPU, the state information or state transition information generated according to the state of the device or CPU at the time when the command signal is transmitted is different.

As described above, after the information generation unit 142 generates the state information and the state transition information for each of the plurality of command signals, the counter 141 is for each time and state transition information staying in each state for each state information. Count the number of state transition information.

Referring to the above example, the counter 141 counts the time remaining in each state for each state information and the number of state transition information for each state transition information as follows. For each of the first command signal, the second command signal, and the third command signal, the state information and the state transition information generated by the information generating unit 142 are classified by the type of the state information and the state transition information, respectively. The number of state transition information for each time and state transition information staying in the state is counted. In this case, the state information and the state transition information are classified into different types according to the device or CPU to which the command signal is to be transmitted and counted. The result of the counter 141 counting the state information and the state transition information generated for the first to third command signals is as follows.

First device Second device condition
Information First state information 1 sec 1 sec Second state information 2 sec 1 sec action
Information First state transition information 2 One Second state transition information 2 One Third state transition information One

As described above, the system power consumption calculator 143 uses the number of time and state transition information staying in the state counted by the counter, the static power consumption value corresponding to the state information, and the dynamic power consumption value corresponding to the state transition information. ) Calculates the system power consumption value consumed by the system. In this case, the static power consumption value may be expressed in units of energy per unit time (W), and the dynamic power consumption value may be expressed in units of energy (J). This is because, in the case of static power consumption, the time of staying in each state for each state information is counted, and in the case of dynamic power consumption, the number of state transition information is counted.

First device Second device Time (sec) / number () Power consumption value Time (sec) / number () Power consumption value Prize
womb
tablet
Bo First state information One A ₁ One A ₂ Second state information 2 B ₁ One B ₂ copper
production
tablet
Bo First state transition information 2 D ₁ One D ₂ Second state transition information 2 E ₁ One E ₂ Third state transition information One F ₁ F ₂

That is, using the results as shown in the above table, the system power consumption calculator 143 calculates the system power consumption. The power consumption consumed in the first device is "(1 × A ₁ ) + (2 × B ₁ ) + (2 × D ₁ ) + ( 2 × E ₁ ) + (1 × F ₁ ) ”, and the power consumption of the second device is“ (1 × A ₂ ) + (1 × B ₂ ) + (1 × D ₂ ) + ( 1 × E ₂ ) "

Therefore, the system power consumption calculation unit 143 is " (1 × A ₁ ) + (2 × B ₁ ) + (2 × D ₁ ) + ( 2 × E ₁ ) + (1 × F ₁ ) "and" (1 × A ₂ ) + (1 × B ₂ ) + (1 × D ₂ ) + ( 1 × E ₂ The system power consumption value is calculated by summing the """ value. The operation of the information generating unit 142, the unit power consumption calculating unit 144, and the system power consumption calculating unit 143 will now be described with reference to FIGS. Let's take a closer look.

Hereinafter, a structure of a system for power consumption estimation according to another embodiment of the present invention will be described with reference to FIG. 2B. 2B is a diagram showing the structure of a system for power consumption estimation according to another embodiment of the present invention.

In the system for estimating power consumption shown in FIG. 2B, the first to third embodiments, the unit power consumption calculator 311 and the system power consumption calculator (described above with reference to FIG. 2A) Since the controller 310 including 312 has the same function and structure except that the controller 310 is included in the CPU 300, a detailed description thereof will be omitted.

As such, as the unit power consumption calculator 311 and the system power consumption calculator 312 are included in the CPU 300, the load on the operation monitoring unit 100 is reduced, so that the speed of the system power consumption estimation is increased. Can be improved.

According to the first embodiment of the system for power consumption estimation illustrated in FIG. 2B, the on-chip bus interface 110 is included in the operation monitoring unit 100, and the unit 300 calculates the power consumption of the unit 300. Included. In addition, a parser 120 for improving processing speed may be further included in the operation monitoring unit 100.

Further, according to the second embodiment of the system for power consumption estimation shown in FIG. 2B, the on-chip bus interface 110 and the information generator 142 are included in the operation monitoring unit 100, and the CPU 300 The unit power consumption calculator 311 and the system power consumption calculator 312 are included. In addition, a parser 120 for improving processing speed may be further included in the operation monitoring unit 100.

Finally, according to the third embodiment of the system for power consumption estimation shown in FIG. 2B, the on-chip bus interface 110, the information generator 142, and the counter 141 are included in the operation monitoring unit 100. The system 300 includes a system power consumption calculator 312. In addition, a parser 120 for improving processing speed may be further included in the operation monitoring unit 100.

At this time, the function of each component is the same as the function of each component described above with reference to Figure 2a, and description thereof will be omitted.

Hereinafter, a power consumption estimation method of a system according to another embodiment of the present invention will be described with reference to FIGS. 3 and 4. 3 and 4 are control flowcharts illustrating a power consumption estimation method of a system according to another embodiment of the present invention. Since the method of estimating power consumption of the system illustrated in FIGS. 3 and 4 is the same as the method described above with reference to FIGS. 1, 2A, and 2B, a redundant description will be omitted and briefly described.

At this time, the power consumption estimation method of the system according to another embodiment of the present invention, as described with reference to Figure 2a, may be performed only in the operation monitoring, as described above with reference to Figure 2b, some steps In motion monitoring, it is clear that some remaining steps may be performed on the CPU. However, the present invention is not limited thereto, and a method of estimating power consumption in a system using an operation monitoring unit may correspond to a method of estimating power consumption of a system according to another embodiment of the present invention.

However, for convenience of description, it will be assumed that the system power consumption estimation method described with reference to FIGS. 3 and 4 will all be performed in operation monitoring.

First, referring to FIG. 3, the command signals exchanged between the CPU and the device on the on-chip bus are monitored (S310). In this case, the command signal includes identification information for identifying a device or a CPU to which the command signal is transmitted.

The monitored command signal is parsed (S320). This parsing process (S320) is not an essential process, and is an additional step for further improving the processing speed.

Next, the unit consumption consumed when the operation according to the command signal is performed in the device or the CPU by using the power consumption for each command signal stored in advance according to the identification information and the type of the command signal included in the monitored command signal. The power value is calculated (S330).

In this case, the step of calculating the unit power consumption value (S330) includes generating state information or state transition information using the command signal (S331) and calculating the unit power consumption value using the same (S332). can do.

Generating the state information or the state transition information using the command signal (S331), as described above, by virtually simulating that the CPU or device to which the command signal is transmitted performs an operation according to the command signal. Can be performed. The process of generating the state information indicating the states to be passed when the operation based on the command signal is performed or the state transition information indicating the unit operations to be processed when the operation based on the command signal is performed may include the operation of the information generator 142 described above. Since it is the same as, description thereof is omitted. There may be a plurality of state transition information or state information generated for one command signal.

Next, using the static power consumption value corresponding to the state information and the dynamic power consumption value corresponding to the state transition information, the unit power consumption value consumed when the operation according to the command signal is performed in the device or the CPU is calculated. (S332). That is, the state information and the state transition information are generated according to the command signal, and the value of the unit power consumption consumed when the operation according to the command signal is performed using the static power consumption value and the dynamic power consumption value (S332). ).

If there are a plurality of monitored command signals, state information or state transition information is generated for each command signal, and a unit power consumption value is calculated for each command signal using the state information and state transition information. . Then, the sum of the unit power consumption for each of the command signals is added to calculate a system power consumption value consumed in the system (S340).

As described above, the operation monitoring unit connected to the on-chip bus calculates the value of the power consumed by the CPU or device included in the system according to the command signal, thereby estimating the system power consumption consumed throughout the system.

Next, a power consumption estimation method of a system according to another embodiment of the present invention will be described with reference to FIG. 4. In the method of estimating power consumption of the system illustrated in FIG. 4, all processes are the same except for the method of estimating power consumption of the system illustrated in FIG. 3 and the process of calculating unit power consumption. Let's take a look.

First, a plurality of command signals exchanged between the CPU and the device on the on-chip bus are monitored (S410). In this case, the command signal includes identification information for identifying a device or a CPU to which the command signal is transmitted.

The monitored command signal is parsed (S420), and the operation according to the plurality of command signals is performed by the device or the CPU by using identification information included in the plurality of command signals and power consumption value for each command signal according to the type of the command signal. In operation S430, a unit power consumption value is calculated.

Computing the unit power consumption (S430) may include generating state information or state transition information using a command signal (S431) and state transition information for each time and state transition information staying in each state for each generated state information. It may include the step of counting the number of (S432).

Generating the state information or the state transition information using the command signal (S431), as described above, by virtually simulating the CPU or device to which the command signal is transmitted to perform an operation according to the command signal Can be performed. The process of generating the state information indicating the states to be passed when the operation based on the command signal is performed or the state transition information indicating the unit operations to be processed when the operation based on the command signal is performed may include the operation of the information generator 142 described above. Since it is the same as, description thereof is omitted. There may be a plurality of state transition information or state information generated for one command signal. In addition, according to the present embodiment, state information or state transition information for each of the plurality of monitored command signals is generated (S431).

Next, the time remaining in each state for each generated state information and the number of state transition information for each state transition information are counted (S432). That is, the number of times of staying in each state generated for each kind of state information and the number of state transition information generated for each kind of state transition information are counted. Since the state information and the state transition information generated according to the type of device or CPU are also different, the counting result according to the generated state transition information and the state information may be as shown in Table 1.

Next, using the static power consumption value corresponding to the state information, the dynamic power consumption value corresponding to the state transition information stored in advance, and the time to stay for each state information counted by the counter and the number of state transition information, When the operation according to the command signal is performed in the system, a system power consumption value is calculated (S440).

That is, as shown in Table 2, the system power consumption using the static power consumption value corresponding to the state information, the dynamic power consumption value corresponding to the state transition information, and the number of staying time and state transition information for each state information counted by the counter. To calculate (S440).

By performing an operation according to a command signal in a CPU or a device included in the system, the power consumption is calculated and summed up, so this value is equal to the value of power consumed in the entire system. In the case of Table 2, "(1 × A ₁ ) + (2 × B ₁ ) + (2 × D ₁ ) + ( 2 × E ₁ ) + (1 × F ₁ ) "and" (1 × A ₂ ) + (1 × B ₂ ) + (1 × D ₂ ) + ( 1 × E ₂ The system power consumption value is calculated by summing the """

Hereinafter, referring to FIGS. 5 to 8, in the motion monitoring unit, a system for estimating power consumption, or a method for measuring power consumption of a system, state information and state transition information are generated, and thus, unit power consumption and Let's take a look at how to calculate the system power consumption.

5 is an exemplary diagram illustrating state information and state transition information generated by a motion monitoring unit, a system for estimating power consumption, or a method of measuring power consumption of a system according to the present invention, and FIG. 6 is a static power consumption and a dynamic power consumption value. This is a table showing.

5 is an exemplary diagram showing state transition information and state information generated when the device is a DDR SDRAM. Status information (S0, S1, S2, ..., S17) that the DDR SDRAM can roughen is shown in a circle, and each state transition information (D1, D2, D3, ..., D27) is shown by an arrow. It is.

State information S0, S1, S2, ..., S17 shown in a circle indicates states that the DDR SDRAM passes through to perform operations according to the command signal. And the operation information (D1, D2, D3, ..., D27) shown by the arrow is a unit operation to process the operation according to the command signal.

For example, when the DDR SDRAM currently in the S2 state performs the 'WRITE' operation, the information generating unit according to the present embodiment simulates the same virtual operation as the actual DDR SDRAM 'WRITE' operation. S2? D22? S5? D5? S6? D6? S7? D7? S8? D8? S9? D9? S10? D10 '? That is, when the DDR SDRAM performs the 'WRITE' operation, if the 'WRITE' operation is performed through the path shown in FIG. 5, the state information of S2, S5, S6, S7, S8, S9, S10, D22, State transition information of D5, D6, D7, D8, D9, and D10 is generated.

As such, a plurality of state information and state transition information may be generated for one command signal through a simulation process such as actually performing an operation according to the command signal in the device. Of course, in the case of a specific command signal, only state information may be generated.

As shown in FIG. 5, according to the present embodiment, when the operation according to the command signal is performed, the state information and the state transition information indicating the state that each device or CPU undergoes and the unit operation to be performed are generated. The power consumption can be estimated more accurately than the power consumption according to the type of signal. In addition, the current state of the device or the CPU can be accurately known, and the power consumption can be estimated more accurately by reflecting the difference in the power consumed according to the state.

Even if the device performs a specific operation according to the command signal, not only the operation may be performed, but the operation may be performed through various unit operations, and power is consumed even when the device is in a non-operating state.

6 is a table showing static power consumption values for each state information and state transition information power consumption values for each state transition information. According to the present embodiment, when the state transition information and the state information are generated, the unit power consumption or the system power consumption can be calculated using the dynamic power consumption value and the static power consumption value. As shown in FIG. 6, the value of static power consumption may be expressed in units of the ratio of energy consumed to time (mW), and the value of dynamic power consumption may be expressed in units of energy (nJ). .

Hereinafter, a system power consumption value is calculated using state transition information and state information, the number of state transition information for each state transition information, and the time for staying in each state for each state information. do.

The equation for calculating the system power consumption value using state transition information and state information, the number of state transition information for each state transition information, and the time for staying in each state for each state information is as follows.

은, DDR 디바이스의 소비 전력 즉, 동작 모니터링 유닛의 주기 동안 소비한 에너지의 값을 나타낸다. 그리고,

는 동적 소비 전력의 값,

는 정적 소비 전력의 값,

은 각각의 상태 천이 정보의 개수,

는 각각의 상태 정보에 머무르게 되는, 주기의 개수 나타낸다.

는 동작 모니터링 유닛의 주기를 나타낸다.

은, DDR 디바이스의 주파수를 나타내는 것으로, 앞선

를

나눔으로써, 각 상태 정보에 머무르게 되는 시간을 알 수 있다.

Represents the power consumption of the DDR device, that is, the energy consumed during the period of the operation monitoring unit. And,

Is the value of dynamic power consumption,

Is the value of static power consumption,

Is the number of state transition information for each,

Denotes the number of cycles to stay in each state information.

Represents the period of the operation monitoring unit.

Is the frequency of the DDR device.

To

By sharing, the time to stay in each state information can be known.

은 상태 천이 정보 별 동적 소비 전력의 값에 각각의 상태 천이 정보가 생성된 개수를 곱하여 그 값을 모두 합산 함으로써, 동작에 따른 소비되는 에너지의 값을 구한다. 이때,

은 단위를 맞추기 위함이다.

Is obtained by multiplying the values of the dynamic power consumption for each state transition information by the number of state transition information generated and summing all the values, thereby obtaining a value of energy consumed according to the operation. At this time,

Is to match the units.

은 상태 정보 별 정적 소비 전력의 값에 각각의 상태 정보에 몇 주기를 머무르는 지 그 개수를 곱하고,

인 디바이스의 클럭 주기로 나누어 합산함으로써, 상태에 따라 소비되는 에너지의 값을 구할 수 있다.

은 단위를 맞추기 위함이다.

Multiply the value of static power consumption by state information by the number of cycles of each state information,

By dividing by the clock period of the in-device, the sum of the energy consumed according to the state can be obtained.

Is to match the units.

Therefore, the value of power consumption of the system can be calculated through Equation 1 as described above.

7 and 8, when the operation according to the command signal is performed in the NOR flash device, the generated state information, state transition information, static power consumption, and dynamic power consumption values will be described.

7 is a diagram illustrating state information and state transition information generated when an operation according to a command signal is performed in a NOR flash device, and FIG. 8 is a table illustrating static power consumption and dynamic power consumption values of the NOR flash device. to be.

State information S0, S1, S2,..., S10 shown in a circle indicates states that a NOR flash passes through to perform operations according to a command signal. And the operation information (D1, D2, D3, ..., D13) shown by the arrow is a unit operation to process the operation according to the command signal.

If the NOR flash in the S2 state now performs the 'WORD PROGRAMMING' operation, the information generating unit according to the present embodiment simulates the same virtual operation as the actual NOR flash 'WORD PROGRAMMING' operation. Generates state transition information and state information of S1? D1? S2? D2? S3? D3 '. That is, when the NOR flash performs the 'WORD PROGRAMMING' operation, if the 'ORW PROGRAMMING' operation is performed through the path shown in FIG. 7, the state information of S1, S2, and S3 and the state transition of D1, D2, and D3 The information is generated.

8 is a table illustrating static power consumption values for each state information and dynamic power consumption values for each state transition information. According to the present embodiment, when the state transition information and the state information are generated, the unit power consumption or the system power consumption can be calculated using the dynamic power consumption value and the static power consumption value. As shown in FIG. 6, the value of static power consumption may be expressed in units of the ratio of energy consumed to time, and the value of dynamic power consumption may be expressed in units of energy nJ. .

Since the process of calculating the system power consumption value using the static power consumption value and the dynamic power consumption value shown in FIG. 8 has been described with reference to FIG. 6, description thereof will be omitted.

Hereinafter, the accuracy of the power consumption estimation method of the system according to an embodiment of the present invention will be described with reference to FIGS. 9 to 10.

9 is a graph illustrating a result of estimating long-term (LING-term) system power consumption using an operation monitoring unit according to an exemplary embodiment of the present invention.

FIG. 9 is a diagram illustrating a result of estimating power consumed by a DDR SDRAM and a NOR flash device using an operation monitoring unit according to the present embodiment, using an actual power value and an operation monitoring unit included in a CPU according to the prior art. This graph is compared with the estimated power consumption.

 First, FIG. 9A is a graph illustrating a measurement of power value consumed by an actual DDR SDRAM and a NOR flash device. It can be seen that power is consumed in different forms depending on the type of device such as DDR SDRAM and NOR flash. In particular, NOR flash shows power consumption for about 250ms to 300ms.

FIG. 9B is a graph showing a result of estimating power consumed by the DDR SDRAM and the NOR flash device by using the operation monitoring unit according to the present embodiment. Changes in power values consumed by the actual DDR SDRAM and the NOR flash device shown in FIG. 9A and the DDR SDRAM estimated using the operation monitoring unit according to the present embodiment shown in FIG. It can be seen that the variation of the power value consumed by the NOR flash device has a very similar form.

As shown in (b) of FIG. 9, the operation monitoring unit according to the present embodiment estimates the power consumption by classifying the types of the DDR SDRAM and the NOR flash device, and particularly, the power for about 250 ms to 300 ms of the NOR flash. It can be seen from Figure 9 (b) and Figure 9 (a) to estimate the aspect of consuming very similarly.

On the other hand, the estimation result of the power using the motion monitoring unit located in the conventional CPU shown in FIG. 9C does not distinguish the power consumption value according to each device type, which is very different from the change pattern of the actual power consumption. It can be seen that they are different.

As such, the power consumption estimation of the system using the motion monitoring unit according to the embodiment of the present invention can make a more accurate estimation than in the prior art.

FIG. 10 is a graph illustrating a result of estimating short term system power consumption using an operation monitoring unit according to an exemplary embodiment of the present invention.

10 is a diagram illustrating a result of estimating power consumed by a DDR SDRAM and a NOR flash device using an operation monitoring unit according to the present embodiment, a power consumption value estimated through simulation, and an operation included in a CPU according to the related art. This graph is compared with the power consumption value estimated using the monitoring unit.

 First, FIG. 10 (a) is a graph showing a result of simulation and estimation of a power value consumed by an actual DDR SDRAM and a NOR flash device. It can be seen that power is consumed in different forms depending on the type of device such as DDR SDRAM and NOR flash. In particular, NOR flash shows power consumption from about 8ms.

FIG. 10B is a graph showing a result of estimating power consumed by the DDR SDRAM and the NOR flash device by using the operation monitoring unit according to the present embodiment. Estimation using a change pattern of power values consumed by the DDR SDRAM and the NOR flash device estimated through the simulation shown in FIG. 10A and the operation monitoring unit according to the present embodiment shown in FIG. 10B. It can be seen that the changes in power values consumed by a DDR SDRAM and a NOR flash device are very similar.

As shown in (b) of FIG. 10, the operation monitoring unit according to the present embodiment estimates the power consumption by classifying the types of the DDR SDRAM and the NOR flash device, and consumes power from about 8 ms of the NOR flash. It can be seen from Figure 10 (b) and Figure 10 (a) to estimate the aspect very similarly.

On the other hand, the estimation result of the power using the motion monitoring unit located in the conventional CPU shown in FIG. 10C does not distinguish the power consumption value according to each device type, which is very different from the change pattern of the actual power consumption. It can be seen that they are different.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

1 is an exemplary diagram showing a structure of a system including a performance monitoring unit (PMU) according to an embodiment of the present invention.

2A and 2B are structural diagrams showing the structure of a motion monitoring unit (PMU) according to an embodiment of the present invention.

3 and 4 are control flow diagrams illustrating a power consumption estimation method of a system according to another embodiment of the present invention.

5 is an exemplary diagram illustrating state information and state transition information generated in a power consumption measuring method of an operation monitoring unit or system according to the present invention.

6 is a table illustrating static power consumption and dynamic power consumption values according to an embodiment of the present invention.

7 is an exemplary diagram illustrating state information and state transition information generated when an operation according to a command signal is performed in a NOR flash device according to one embodiment of the present invention.

8 is a table illustrating static power consumption and dynamic power consumption values of a NOR flash device, in accordance with an embodiment of the invention.

9 is a graph illustrating a result of estimating long term system power consumption using an operation monitoring unit according to an embodiment of the present invention.

FIG. 10 is a graph illustrating a result of estimating power consumption of a short term system using an operation monitoring unit according to an embodiment of the present invention. FIG.

Claims (27)

In the method for estimating the power consumed in a system including a CPU and a device using a performance monitoring unit (PMU) connected to an on-chip bus, Monitoring command signals interchanged between the CPU and the device on the on-chip bus, the command signals comprising identification information identifying a device or CPU to which the command signal is passed; And Calculating a unit power consumption value consumed when an operation according to the command signal is performed in the device or the CPU using the identification information and a power consumption value for each command signal according to the command signal. Power consumption estimation method. The method of claim 1, Computing the unit power consumption value, By using the identification information included in the command signal, When the device or CPU to which the command signal is transmitted performs an operation according to the command signal, state information indicating the state of the device or the CPU passing through or the unit operation to be processed when performing an operation according to the command signal Generating state transition information; And The operation according to the command signal is performed using the state information, the state transition information, a static power consumption value corresponding to the state information, and a dynamic power consumption value corresponding to the state transition information. Or calculating a unit power consumption value consumed when the CPU is executed in the CPU. The method of claim 1, The command signal is a plurality, Computing the unit power consumption value is calculated for each of the plurality of command signals, And calculating a system power consumption value consumed by the system by summing all of the unit power consumption values calculated for each of the plurality of command signals. The method of claim 1, The command signal is a plurality, Computing the unit power consumption value The device or CPU to which the command signal is transmitted, using the identification information included in the command signal, for each of the plurality of command signals when the device performs an operation according to the command signal, or Generating state information indicating the state of the CPU or state transition information indicating a unit operation to be processed when performing an operation according to the command signal; And And counting the number of the state transition information for each state transition information and the time for which the device or the CPU stays in the state for each state information. The operation according to the plurality of command signals is performed using the static power consumption value corresponding to the state information, the dynamic power consumption value corresponding to the state transition information, the time to stay in the state and the number of the state transition information. Calculating a system power consumption value that is consumed when performed in the system. The method of claim 2, And the state information or the state transition information generated for the one command signal is plural. The method of claim 2, Generating the state information and the state transition information And the CPU or the device to which the command signal is transmitted virtually simulates performing an operation according to the command signal. The method of claim 1, After monitoring the command signal, Parsing the command signal. The method of claim 1, And the device is a memory device. A program of instructions that can be executed by a digital processing apparatus for performing the power consumption estimation method of the system according to any one of claims 1 to 8 is tangibly implemented and can be read by the digital processing apparatus. The recording medium on which the program can be recorded. In a performance monitoring unit (PMU) for estimating power consumption of a system including a CPU, a device, and an on-chip bus, A command signal coupled to the on-chip bus and interchanged between the CPU and the device on the on-chip bus, wherein the command signal includes identification information identifying the device or the CPU to which the command signal is transmitted. An on-chip bus interface for monitoring; A control unit for calculating a unit power consumption value when an operation corresponding to the command signal is performed by the device or the CPU using the power consumption value for each command signal according to the command signal, the identification information, and the command signal Motion monitoring unit comprising a. The method of claim 10, The command signal is a plurality, The control unit, A unit power consumption calculator configured to calculate the unit power consumption value for each of the plurality of command signals; And And a system power consumption calculator configured to calculate a system power consumption value consumed by the system by summing all of the unit power consumption values corresponding to each of the plurality of command signals. The method of claim 10, The control unit, By using the identification information, when the device or CPU to which the command signal is transmitted performs an operation according to the command signal, status information indicating the state of the device or the CPU passing through or the operation according to the command signal is performed. An information generation unit for generating state transition information indicating a unit operation to be processed;  And a unit power consumption calculator configured to calculate a unit power consumption value using the state information, the state transition information, a static power consumption value corresponding to the state information, and a dynamic power consumption value corresponding to the state transition information. Motion monitoring unit. The method of claim 12, The command signal is a plurality, The unit power consumption calculator calculates the unit power consumption value for each of the plurality of command signals, The control unit, And a system power consumption calculator configured to calculate a system power consumption value consumed by the system by summing all the unit power values calculated for each of the plurality of command signals. The method of claim 10, The command signal is a plurality, The control unit, A state indicating a state of the device or the CPU that is passed through when the device or the CPU to which the command signal is transmitted using the identification information performs the operation according to the command signal, for each of the plurality of command signals. An information generator for generating state transition information indicating a unit operation to be processed when performing information or an operation according to the command signal; A counter for counting the number of the state transition information for each state transition information and the time for which the device or the CPU stays in the state for each state information; And The operation according to the plurality of command signals is performed using the static power consumption value corresponding to the state information, the dynamic power consumption value corresponding to the state transition information, the time to stay in the state, and the number of the state transition information. And a system power consumption calculation unit configured to calculate a system power consumption value consumed when performed in the. The method according to claim 12 or 14, wherein And the state information or the state transition information generated for the one command signal is plural. The method according to claim 12 or 14, wherein The information generating unit And the CPU or the device, to which the command signal is transmitted, virtually simulates performing the operation according to the command signal to generate the state information or the state transition information. The method of claim 10, And a parser for parsing the command signal in a form that can be processed by the motion monitoring unit. The method of claim 10, And the device is a memory device. In a system comprising a CPU, a device and a performance monitoring unit (PMU) connected to an on-chip bus, The operation monitoring unit, A command signal coupled to the on-chip bus and interchanged between the CPU and the device on the on-chip bus, wherein the command signal includes identification information identifying the device or the CPU to which the command signal is transmitted. Includes an on-chip bus interface to monitor, The CPU, And a controller configured to calculate a unit power consumption value when the operation corresponding to the command signal is performed by the device or the CPU using the command signal, the identification information, and the power consumption value for each command signal. System for power consumption estimation. The method of claim 19, The command signal is a plurality, The control unit, A unit power consumption calculator configured to calculate the unit power consumption value for each of the plurality of command signals; And And a system power consumption calculator configured to calculate a system power consumption value consumed by the system by summing all of the unit power consumption values corresponding to each of the plurality of command signals. The method of claim 19, The operation monitoring unit, By using the identification information, when the device or CPU to which the command signal is transmitted performs an operation according to the command signal, status information indicating the state of the device or the CPU passing through or the operation according to the command signal is performed. An information generating unit for generating state transition information indicating a unit operation to be processed when The control unit, And a unit power consumption calculator configured to calculate a unit power consumption value by using the state information, the state transition information, a static power consumption value corresponding to the state information, and a dynamic power consumption value corresponding to the state transition information. Characterized in a system for power consumption estimation. The method of claim 21, The command signal is a plurality, The unit power consumption calculator calculates the unit power consumption value for each of the plurality of command signals, The control unit, And a system power consumption calculator configured to calculate a system power consumption value consumed by the system by summing all the unit power values calculated for each of the plurality of command signals. The method of claim 19, The command signal is a plurality, The operation monitoring unit, For each of the plurality of command signals, the device or the CPU to which the command signal is transmitted using the identification information indicates a state of the device or the CPU that is passed when performing the operation according to the command signal. An information generation unit for generating state transition information indicating a unit operation to be processed when performing the operation according to the state information or the command signal; And And a counter for counting the number of the state transition information for each state transition information and the time the device or the CPU stays in the state for each state information. The control unit The operation according to the plurality of command signals is performed using the static power consumption value corresponding to the state information, the dynamic power consumption value corresponding to the state transition information, the time to stay in the state and the number of the state transition information. And a system power consumption calculator configured to calculate a system power consumption value when performed at. The method of claim 21 or 23, And a plurality of the state information or the state transition information generated by the information generator for one command signal. 24. The method of claim 23, The information generating unit The CPU or the device to which the command signal is transmitted virtually simulates performing an operation according to the command signal to generate the state information or the state transition information. system. The method of claim 19, The operation monitoring unit, And a parser for parsing the command signal in a form that can be processed by the motion monitoring unit. The method of claim 19, And the device is a memory device.

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