JP5741813B2 - Power consumption control device, power consumption control method and program - Google Patents

Description

  The present invention relates to a power consumption control device that controls power consumption of a plurality of devices to be controlled, a power consumption control method performed by the power consumption control device, and a program.

In an environment where there are a plurality of devices, such as a data center including a plurality of computers, there are several methods for controlling the total power consumption of these devices to be less than or equal to the power that can be supplied.
For example, in the method of setting the power consumption upper limit value for each device, if each power consumption upper limit value is set so that the total of these power consumption upper limit values is less than or equal to the power that can be supplied, the power consumption of these devices Can be kept below the power that can be supplied.

  Further, in Patent Document 1, the power management apparatus is configured so that the total power consumption amount of each computer system does not exceed the total suppliable power amount based on priority information indicating the priority related to power supply to each computer system. The way to control is shown.

JP 2006-11793 A

In the method of setting the power consumption upper limit value for each device, if each power consumption upper limit value is set so that the total of these power consumption upper limit values is less than or equal to the power that can be supplied, the power consumption of a certain device will become the power consumption upper limit value. Even if the power consumption of the entire device is lower than the suppliable power, the other devices cannot operate with the power consumption equal to or higher than the power consumption upper limit set for the device. As a result, even though there is a surplus in the power that can be supplied, each device operates in a state where the power consumption is limited, and there is a possibility that the capability of the device cannot be fully utilized.
On the other hand, increasing the power consumption upper limit value of each device may cause the entire device power consumption to exceed the suppliable power when each device operates near the power consumption upper limit value, causing all devices to go down. is there.

  Further, based on priority information indicating a priority related to power supply to each computer system, the total power consumption amount of each computer system does not exceed the total suppliable power amount. In such a control method, it is necessary to prepare priority information indicating a priority related to power supply to each computer system.

  An object of the present invention is to provide a power consumption control device, a power consumption control method, and a program that can solve the above-described problems.

The present invention was made to solve the above-described problem, and a power consumption control device according to an aspect of the present invention includes a power consumption value acquisition unit that acquires a power consumption value of a target device, and the power consumption value acquisition unit. A power consumption average value calculation unit that calculates a power consumption average value obtained by dividing the total power consumption value acquired by the number of target devices, a necessity determination unit that determines whether or not power consumption suppression is necessary, And a device selection unit that selects a device having a power consumption value larger than the power consumption average value as a device for suppressing power consumption when the non-determination unit determines that the power consumption is to be suppressed.

A power consumption control method according to an aspect of the present invention is a power consumption control method for a power consumption control device, and includes a power consumption value acquisition step of acquiring a power consumption value of a target device, and the power consumption value acquisition step. A power consumption average value calculating step for calculating an average power consumption value obtained by dividing the total of the power consumption values acquired by the number of target devices, a necessity determining step for determining whether or not to suppress power consumption, And a device selection step of selecting a device having a power consumption value larger than the average power consumption value as a device for suppressing power consumption when it is determined that the power consumption must be suppressed in the negative determination step. .

Further, the program according to one aspect of the present invention provides a computer serving as a power consumption control device that acquires a power consumption value of a target device in a power consumption value acquisition step and the power consumption value acquired in the power consumption value acquisition step. Power consumption average value calculating step for calculating an average power consumption value obtained by dividing the total by the number of target devices, a necessity determining step for determining whether or not to suppress power consumption, and a power consumption in the necessity determining step When it is determined that suppression is necessary, the program is for executing a device selection step of selecting a device having a power consumption value larger than the power consumption average value as a device for suppressing power consumption.

  ADVANTAGE OF THE INVENTION According to this invention, prioritizing regarding the power supply to each apparatus (each computer system) of power consumption control object can be made unnecessary, and power consumption can be controlled appropriately.

It is a block diagram which shows schematic structure of the computer system in one Embodiment of this invention. It is a block diagram which shows schematic structure of the computer in the same embodiment. It is explanatory drawing which shows the example of the information acquisition from a follower by the reader in the embodiment. It is explanatory drawing which shows the example of the apparatus information which the apparatus information storage part in the embodiment memorize | stores. It is a figure which shows the example of the apparatus selection by the apparatus selection part in the embodiment. It is explanatory drawing which shows the example of the suppression rank table which the suppression rank table memory | storage part in the same embodiment memorize | stores. It is explanatory drawing which shows the example of the leader takeover reservation transmission from the leader to the takeover destination in the same embodiment. It is a flowchart which shows the process sequence of the power consumption control by the power consumption control apparatus in the embodiment. In the same embodiment, it is a flowchart which shows the process sequence of the process as a reader | leader which a power consumption control apparatus performs. 4 is a flowchart illustrating a processing procedure of processing as a follower performed by the power consumption control device in the embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing a schematic configuration of a computer system 1 according to an embodiment of the present invention. In FIG. 1, the computer system 1 includes computers 10-1 to 10-10 and a switch 11.
The computers 10-1 to 10-10 are devices for power consumption control (hereinafter referred to as “target devices”), and each of the computers 10-1 to 10-10 includes a power consumption control device. Any one of the power consumption control devices included in the computers 10-1 to 10-10 serves as a reader to control power consumption. The other power consumption control device transmits information to the reader as a follower, and controls the power consumption of the computer including the power consumption control device itself in accordance with an instruction from the reader.
Hereinafter, the computers 10-1 to 10-10 are collectively referred to as “computer 10”.
The switch 11 is connected to the computers 10-1 to 10-10 and transfers communication signals between the computers.

  FIG. 2 is a configuration diagram showing a schematic configuration of the computer 10. In FIG. 1, the computer 10 includes a power supply unit 20, a CPU clock setting unit 30, and a power consumption control device 40. The power consumption control device 40 includes a communication unit (reservation reception unit, reservation transmission unit) 411, a waiting time measurement unit 511, a current device state determination unit 512, a takeover destination determination unit 521, a power consumption measurement unit 611, A power consumption value processing unit (power consumption average value calculation unit) 612, a device information storage unit 613, a necessity determination unit 621, an upper limit threshold storage unit 622, a device selection unit 631, and a suppression rank table storage unit 641 , A suppression rank determination unit 642, a relaxation processing unit 651, a relaxation permission threshold storage unit 652, a CPU related processing unit 661, and a relaxation request threshold storage unit 662. The communication unit 411 is connected to the switch 11.

The power supply unit 20 supplies power to each unit of the computer 10.
The CPU clock setting unit 30 sets the CPU clock frequency of the computer 10 and outputs the CPU clock frequency.
The power consumption control device 40 adjusts the power consumption by adjusting the clock frequency of the CPU included in the computer 10.
The communication unit 411 performs communication with the power consumption control device 40 of another computer via the switch 11. In particular, the communication unit 411 receives a power consumption control takeover reservation for reserving a leader to take over. In addition, when the power consumption control device 40 including the communication unit 411 itself becomes a leader, the communication unit 411 makes a power consumption control takeover reservation to another power consumption control device 40 determined by the takeover destination determination unit 521. Send.

  Note that the “reader” referred to here acquires information such as a power consumption value from another power consumption control device 40, and determines the power consumption suppression rank of the target device (computers 10-1 to 10-10). This is a power control device 40. Here, any one of the power consumption control devices 40 included in the computer system 1 serves as a reader. The other power consumption control device 40 is a follower that performs power consumption control of the computer 10 including the power consumption control device 40 itself according to the determination of the reader.

The waiting time measuring unit 511 measures the elapsed time since the communication unit 411 received the power consumption control takeover reservation, and detects the elapse of a predetermined waiting time.
The current device state determination unit 512 determines the current reader state based on information received by the communication unit 411 from the current reader.

The takeover destination determining unit 521, when the power consumption control device 40 including the takeover destination determining unit 521 itself becomes a leader, the power consumption control device 40 to be taken over next (hereinafter referred to as "takeover destination"). To decide.
The power consumption measuring unit 611 includes a power consumption meter and measures the power consumption of the computer 10 including the power consumption measuring unit 611 itself.

  When the power consumption control device 40 including the power consumption value processing unit 612 itself becomes a reader, the power consumption value processing unit 612 and the power consumption value measured by the power consumption measurement unit 611 and other received by the communication unit 411 are displayed. Based on the power consumption value of the computer, the total power consumption value of the computers 10-1 to 10-10 and the average value per unit (hereinafter referred to as “consumption”) obtained by dividing the total power consumption value by the number of computers (10). (Referred to as “average power value”).

  The device information storage unit 613 includes information related to the target device such as identification information (for example, IP address) of the target device (computers 10-1 to 10-10), power consumption measurement values acquired from each device, It includes information related to the power consumption control device 40 such as a reader flag indicating whether the power consumption control device 40 is a reader.

The necessity determination unit 621 needs to suppress power consumption based on the total power consumption value calculated by the power consumption value processing unit 612 when the power consumption control device 40 including the necessity determination unit 621 itself becomes a reader. Determine presence or absence. The necessity determination unit 621 determines that it is not necessary to suppress power consumption when the total power consumption value calculated by the power consumption value processing unit 612 is equal to or lower than an upper limit threshold that is a preset constant. If it exceeds, it is determined that it is necessary to suppress power consumption.
The upper limit threshold storage unit 622 stores in advance an upper limit threshold used when the necessity determination unit 621 determines whether or not it is necessary to suppress power consumption.

When the necessity determination unit 621 determines that the power consumption needs to be suppressed, the device selection unit 631 selects the computer 10 having a power consumption value larger than the power consumption average value as a device for suppressing the power consumption.
The suppression rank determination unit 642 calculates, for each device (computer 10) selected by the device selection unit 631, a difference obtained by subtracting the power consumption average value from the power consumption value of the device, and based on the difference, the device The power consumption suppression rank for is determined.
The suppression rank table storage unit 641 stores in advance a suppression rank table used when the suppression rank determination unit 642 determines a power consumption suppression rank.

When the mitigation processing unit 651 acquires a mitigation request for the power consumption suppression rank from any of the power consumption control devices 40, the mitigation processing unit 651 determines whether mitigation is possible. When the mitigation processing unit 651 determines that mitigation is possible, the power consumption suppression rank of any computer 10 is mitigated.
The relaxation permission threshold storage unit 652 stores in advance a relaxation permission threshold that is a preset constant used when the relaxation processing unit 651 determines whether relaxation is possible.

The CPU-related processing unit 661 causes the CPU clock setting unit 30 to set the CPU clock based on the power consumption suppression rank determined by the power consumption control device 40 of the reader. Further, the CPU related processing unit 661 determines whether to request relaxation of the power consumption suppression rank based on the CPU load of the computer 10 including the CPU related processing unit 661 itself. If it is determined to be requested, the CPU related processing unit 661 requests the relaxation processing unit 651 of the power consumption control device 40 of the reader to relax the power consumption suppression rank via the communication unit 411.
The relaxation request threshold storage unit 662 stores in advance a relaxation request threshold that is a preset constant used when the CPU-related processing unit 661 determines whether to request relaxation of the power consumption suppression rank.

The power consumption control device 40 is realized as a part of the computer 10, for example.
For example, the waiting time measurement unit 511, the current device state determination unit 512, the takeover destination determination unit 521, the power consumption value processing unit 612, the necessity determination unit 621, the device selection unit 631, and the suppression rank determination unit 642 The relaxation processing unit 651, the relaxation permission threshold storage unit 652, and the CPU-related processing unit 661 are realized by the CPU included in the computer 10 reading out and executing a program from the storage unit. In addition, the device information storage unit 613, the upper limit threshold storage unit 622, the suppression rank table storage unit 641, and the relaxation request threshold storage unit 662 are realized using a storage device included in the computer 10. The communication unit 411 is realized by executing a program of a network communication unit included in the computer 10 and a CPU included in the computer 10. Further, the computer 10 includes a power consumption meter that measures its own power consumption, and the power consumption measurement unit 611 is realized using the power consumption meter.
Note that the method of realizing the power consumption control device 40 is not limited to the method realized as part of the computer 10. For example, the power consumption control device 40 may be realized as a dedicated device in a housing different from the housing of the computer 10.

  The power consumption measurement unit 611 and the communication unit 411 constitute a power consumption value acquisition unit. That is, the power consumption measuring unit 611 measures (acquires) the power consumption value of the computer 10 including the power consumption measuring unit 611 itself, and the communication unit 411 receives (acquires) the power consumption value of the other computer 10. .

Next, with reference to FIGS. 3 to 6, description will be given of selection of a power consumption suppression target device and determination of a suppression rank performed by the power consumption control device 40 of the reader.
FIG. 3 is an explanatory diagram illustrating an example of information acquisition from the follower by the reader. In the example of the figure, the power consumption control device 40 of the computer 10-6 is a leader, and the other power consumption control devices 40 are followers. The signal D11 indicates a signal for requesting transmission of a power consumption value from the power consumption control device 40 (reader) of the computer 10-6 to the power consumption control device 40 (follower) of the computer 10-1. The signal D12 indicates a signal that returns a power consumption value from the power consumption control device 40 (follower) of the computer 10-1 to the power consumption control device 40 (reader) of the computer 10-6.

The power consumption control device 40 serving as a leader periodically transmits a signal requesting power consumption value transmission to each of the power consumption control devices 40 serving as followers, such as a signal D11 in FIG. To do. Then, according to the signal, each of the power consumption control devices 40 that are the followers periodically sends a signal that answers the power consumption value of the computer 10 that includes the power consumption control device 40 itself, as in the signal D12 of FIG. To send.
In addition, the power consumption value measuring unit 611 of the power consumption control device 40 serving as a reader periodically measures the power consumption of the computer 10 including the power consumption value measuring unit 611 itself.
As a result, the power consumption control device 40 (power consumption value processing unit 612) serving as a reader periodically acquires the power consumption values of the target devices (computers 10-1 to 10-10).

FIG. 4 is an explanatory diagram illustrating an example of device information stored in the device information storage unit 613.
In the figure, a serial number assigned to each target device (also serving as a serial number assigned to each of the power consumption control devices 40) is stored in advance in the “number” column.
In the “IP address” column, address information (IP address of the computer 10 including the power consumption control device 40) for communicating with each of the power consumption control devices 40 is stored in advance.

Further, the power consumption value of each target device is stored in the “power consumption” column. This power consumption value is acquired from each of the computers 10 by the power consumption value processing unit 612 and written in the device information storage unit 613.
In the “reader” column, a reader flag indicating which power consumption control device 40 is a reader is stored. The value “Yes” of the leader flag indicates that the corresponding power consumption control device 40 is a reader, and the value “No” indicates that the corresponding power consumption control device 40 is a follower.

  In this way, the device information storage unit 613 stores the latest value of the power consumption value that the power consumption value processing unit 612 described in FIG. 3 periodically acquires from each of the target devices.

  FIG. 5 is a diagram illustrating an example of device selection by the device selection unit 631. Bars B101 to B110 of the bar graph shown in the figure indicate the power consumption values of the computers 10-1 to 10-10, respectively, and the power value AV is the average value of the power consumption of these computers 10-1 to 10-10. Indicates. In the same figure, the power consumption values of the computers 10-1, 10-3, 10-6, 10-7, 10-10 indicated by the bars B101, B103, B106, B107, B110 are the average power consumption AV. Is bigger than. When it is necessary to suppress power consumption, a computer whose power consumption value is larger than the average power consumption value is selected as a power consumption suppression target device.

  The device selection unit 631 performs the selection of the power consumption suppression target device. First, the power consumption value processing unit 612 calculates an average power consumption value (value AV in FIG. 5) based on each power consumption value (latest measured value) of the computer 10 stored in the device information storage unit 613. . The device selection unit 631 then calculates the power consumption value based on the average power consumption value calculated by the power consumption value processing unit 612 and each power consumption value of the computer 10 stored in the device information storage unit 613. The computer 10 that is larger than the average value is selected as a power consumption suppression target device.

FIG. 6 is an explanatory diagram illustrating an example of a suppression rank table stored in the suppression rank table storage unit 641.
In the figure, the “rank” column stores a suppression rank. This suppression rank indicates that the smaller the number, the greater the degree of power consumption suppression (that is, the power consumption is controlled to be smaller).

The “CPU clock frequency” column stores the frequency set for the CPU clock of the computer 10 in the corresponding suppression rank. The smaller the number of suppression ranks, the lower the frequency is set, and the greater the degree of power consumption suppression.
In the “difference” column, the application condition of the corresponding suppression rank is indicated by the difference between the power consumption value of the computer 10 and the power consumption average value. For example, when the difference obtained by subtracting the average power consumption value from the power consumption value of the computer 10 is 90 watts (W), the suppression rank 2 is applied to the computer 10.

  The determination of the suppression rank is performed by the suppression rank determination unit 642. When the necessity determination unit 621 determines that the power consumption suppression is necessary, the suppression rank determination unit 642 determines the power consumption average value calculated by the power consumption value processing unit 612 and each consumption of the computer 10 stored in the device information storage unit 613. Get the power value. Next, for each of the devices selected by the device selection unit 631 (the computer 10 whose power consumption value is larger than the power consumption average value), the suppression rank determination unit 642 subtracts the power consumption average value from the power consumption value. Is calculated. And the suppression rank determination part 642 applies the calculated difference to the suppression rank table which the suppression rank table memory | storage part 641 memorize | stores, and determines the suppression rank of each apparatus.

Next, taking over of the reader will be described with reference to FIG.
FIG. 7 is an explanatory diagram showing an example of leader takeover reservation transmission from the leader to the takeover destination. In the example shown in the figure, the computer 10-6 is a leader, and the computer 10-6 determines that the computer 10-5 is the takeover destination. Further, the signal D21 indicates a power consumption control takeover reservation signal.

  The determination of the takeover destination is performed by the takeover destination determining unit 521. The takeover destination determining unit 521 determines a takeover destination when the power consumption control device 40 including the takeover destination determining unit 521 itself becomes a leader. For example, the takeover destination determination unit 521 randomly selects one of the power consumption control devices 40 other than the power consumption control device 40 provided with the takeover destination determination unit 521 from the power consumption control device 40 included in the computer system 1. To do. For example, the takeover destination determining unit 521 randomly selects and selects one of the IP addresses of the computer 10 stored in the device information storage unit 613 other than the IP address of the computer 10 including the takeover destination determining unit 521 itself. The determined IP address is determined as the transmission destination of the power consumption control takeover reservation.

Next, the operation of the power consumption control device 40 will be described with reference to FIGS.
FIG. 8 is a flowchart showing a processing procedure of power consumption control by the power consumption control device 40. When each of the power consumption control devices 40 included in the computer system 1 is connected to a power source (ON) and is set to perform power consumption control, the processing shown in FIG. Here, the setting of whether or not to perform power consumption control is performed collectively for all the power consumption control devices 40 included in the computer system 1, for example, by the user of the computer system 1.

  In the process of FIG. 8, first, the necessity determining unit 621 determines whether the power consumption control device 40 including the necessity determining unit 621 itself is set as a reader in the initial setting (step S101). Here, the reader in the initial setting is set in advance, for example, by the user of the computer system 1 before starting the processing in FIG.

If it is determined in step S101 that the reader is a reader (step S101: YES), the power consumption control device 40 performs processing as a reader (step S171). Then, it progresses to step S111.
On the other hand, when it determines with not being a leader in step S101 (step S101: NO), the communication part 411 determines whether the power consumption control takeover reservation was received (step S111).

When it is determined that the power consumption control takeover reservation has not been received (step S111: NO), the power consumption control device 40 performs processing as a follower (step S121). Then, it returns to step S111 and repeats the following processes.
On the other hand, when it is determined in step S111 that the power consumption control takeover reservation has been received (step S111: YES), the wait time measurement unit 511 has elapsed since the power consumption control device 40 received the power consumption control takeover reservation. Time is measured (step S131). The time measurement is performed to wait for a time from when the power consumption control takeover reservation is received to when the reader is actually taken over.

Next, the waiting time measuring unit 511 determines whether or not the elapsed time from the start of time measurement in step S131 has reached a predetermined time which is a preset fixed time (step S132).
If it is determined that the predetermined time has been reached (step S132: YES), the process proceeds to step S171.

  On the other hand, when it is determined that the predetermined time has not been reached (step S132: NO), the communication unit 411 has received the status information of the current device from the current reader (hereinafter referred to as “current device”). It is determined whether or not (step S141). Here, the reader (current device) periodically transmits status information of the current device to the takeover destination. The communication unit 411 determines whether or not the status information of the current device that is periodically transmitted has been received.

When it is determined that the current device status information has been received (step S141: YES), the current device status determination unit 512 determines the current device status based on the current device status information received by the communication unit 411 ( In step S151), it is determined whether or not the current apparatus cannot execute power consumption control (step S152).
If it is determined that the execution is impossible (step S152: YES), the process proceeds to step S171.

On the other hand, if it is determined in step S152 that the current device can execute power consumption control (step S152: NO), the power consumption control device 40 performs processing as a follower (step S161). Thereafter, the process returns to step S132.
If it is determined in step S141 that the current apparatus status information has not been received (step S141: NO), the process also proceeds to step S161.

FIG. 9 is a flowchart illustrating a processing procedure of processing as a reader performed by the power consumption control device 40. The power consumption control device 40 performs the processing in FIG. 8 in step S171.
First, the communication unit 411 transmits a reader takeover notification to the current device (step S201). At the timing of this reader takeover notification transmission, the reader is taken over. In other words, the power consumption control device 40 that has been the reader (current device) becomes a follower, and the power consumption control device 40 that has transmitted the reader takeover notification becomes the reader.

Next, the communication unit 411 transmits a reader flag rewrite request including identification information (for example, the IP address of the computer 10) of the power consumption control device 40 including the communication unit 411 itself to each power consumption control device 40. When each power consumption control device 40 (communication unit 411) receives the reader flag rewriting request, each power consumption control device 40 (communication unit 411) updates the reader flag so that the power consumption control device 40 as the transmission source becomes the reader.
In addition, the communication unit 411 of the power consumption control device 40 that has become the reader updates the reader flag stored in the power consumption control device 40 (device information storage unit 613) including the communication unit 411 itself (step S202).

Next, the takeover destination determination unit 521 determines the leader takeover destination (the power consumption control device 40 that is the transmission destination of the power consumption control takeover reservation) (step S203). For example, the takeover destination determination unit 521 randomly selects one of the power consumption control devices 40 other than the power consumption control device 40 provided with the takeover destination determination unit 521 from the power consumption control device 40 included in the computer system 1. To do.
Then, the communication unit 411 transmits a power consumption control takeover reservation to the reader takeover destination determined by the takeover destination determining unit 521 (step S204).

  Thereafter, the communication unit 411 determines whether a reader takeover notification has been received from the reader takeover destination (step S205). If it is determined that a reader takeover notification has been received (step S205: YES), the processing in FIG. That is, the power consumption control device 40 ends the processing as a reader and becomes a follower.

  On the other hand, when it is determined in step S205 that the reader takeover notification has not been received (step S205: NO), the communication unit 411 indicates whether or not the power consumption control device 40 including the communication unit 411 itself can perform power consumption control. A signal is transmitted to the reader takeover destination (step S211). If there is no failure in the power consumption control device 40 including the communication unit 411 itself, the communication unit 411 transmits a signal indicating that power consumption control is possible.

Next, the communication unit 411 transmits a signal requesting each power consumption control device 40 to transmit the power consumption value of the computer 10 including the power consumption control device 40 (step S212).
And the communication part 411 acquires the power consumption value transmitted from each power consumption control apparatus 40 as a reply to the said request signal. The communication unit 411 outputs the power consumption value acquired from each power consumption control device 40 to the power consumption value processing unit 612.
The power consumption value processing unit 612 writes the power consumption value output from the communication unit 411 in the device information storage unit 613. In addition, the power consumption value processing unit 612 acquires the power consumption value of the computer 10 including the power consumption value processing unit 612 itself from the power consumption measurement unit 611 and writes it in the device information storage unit 613 (step S213).

  Next, the power consumption value processing unit 612 calculates the total power consumption values of the computers 10-1 to 10-10 by summing the power consumption values stored in the device information storage unit 613. Then, the necessity determination unit 621 compares the total power consumption value calculated by the power consumption value processing unit 612 with the upper limit threshold value stored in the upper limit threshold value storage unit 622 (step S214), and determines whether or not power consumption suppression is required. Is determined (step S215). Specifically, the necessity determination unit 621 determines that it is not necessary to suppress power consumption when the total power consumption value is equal to or less than the upper threshold value, and determines the power consumption when the total power consumption value exceeds the upper threshold value. Judge that it is necessary to suppress.

When it is determined that it is necessary to suppress power consumption (step S215: YES), the power consumption value processing unit 612 calculates the total power consumption value of the computers 10-1 to 10-10 calculated in step S214 as the computer 10-1. The average value of power consumption is calculated by dividing by “10” in the number of 10 to 10−10 (step S221).
The device selection unit 631 then calculates the power consumption value based on the average power consumption value calculated by the power consumption value processing unit 612 and each power consumption value of the computer 10 stored in the device information storage unit 613. The computer 10 that is larger than the average value is selected as a power consumption suppression target device (step S222).

Next, the suppression rank determination unit 642 acquires the average power consumption value calculated by the power consumption value processing unit 612 in step S221 and each power consumption value of the computer 10 stored in the device information storage unit 613. And the suppression rank determination part 642 calculates the difference which subtracted the power consumption average value from the power consumption value about each of the apparatus which the apparatus selection part 631 selected in step S222 (step S223).
And the suppression rank determination part 642 applies the calculated difference to the suppression rank table which the suppression rank table memory | storage part 641 memorize | stores, and determines the suppression rank of each apparatus (step S224).

  Next, the communication unit 411 transmits a command for suppressing power consumption to each of the power consumption suppression target devices based on the suppression rank determined by the suppression rank determination unit 642 (step S225). Each device (each of the power consumption control devices 40) that has received the command suppresses the power consumption of the computer 10 by setting the CPU clock frequency according to the determined suppression rank.

Further, the CPU related processing unit 661 reads the CPU clock frequency of the computer 10 including the CPU related processing unit 661 itself from the suppression rank table storage unit 641 based on the suppression rank determined by the suppression rank determination unit 642, and the CPU clock. Output to the setting unit 30. Then, the CPU clock setting unit 30 sets the CPU clock frequency output from the CPU related processing unit 661 to the CPU clock (step S226).
Thereafter, the process returns to step S205.

On the other hand, if it is determined in step S215 that it is not necessary to suppress power consumption (step S215: NO), the mitigation processing unit 651 determines whether there is a request for mitigation of the power consumption suppression rank from another power consumption control device 40 ( It is determined whether or not the communication unit 411 has received a relaxation request (step S231).
If it is determined that there is no relaxation request (step S231: NO), the process returns to step S205.

  On the other hand, if it is determined in step S231 that there is a relaxation request (step S231: YES), the relaxation processing unit 651 calculates the power consumption of the computers 10-1 to 10-10 calculated by the power consumption value processing unit 612 in step S214. The total value is compared with the relaxation permission threshold stored in the relaxation permission threshold storage unit 652 (step S241), and it is determined whether or not the power consumption suppression level can be relaxed (step S242). Specifically, the mitigation processing unit 651 determines that mitigation is possible when the total power consumption value is less than or equal to the mitigation permission threshold, and determines that mitigation is not possible when it is greater than the mitigation permission threshold.

When it is determined that the power consumption suppression level cannot be relaxed (step S242: NO), the process returns to step S205.
On the other hand, when it is determined that the power consumption suppression level can be alleviated (step S242: YES), the mitigation processing unit 651 selects a mitigation target device (step S251). For example, the mitigation processing unit 651 randomly selects any one of the computers 10 (power consumption control devices 40) that transmitted the mitigation request and sets it as a mitigation target device. And the communication unit 411 includes the mitigation processing unit A relaxation permission for permitting one rank relaxation of the power consumption suppression rank is transmitted to the relaxation target device determined in 651 (step S252).
Thereafter, the process returns to step S205.

FIG. 10 is a flowchart illustrating a processing procedure of processing as a follower performed by the power consumption control device 40. The power consumption control device 40 performs the processing in FIG. 8 in steps S121 and S161.
First, the communication unit 411 determines whether or not it has received a power consumption value request (a request signal transmitted by the reader communication unit 411 in step S212 in FIG. 9) (step S301).

When it is determined that the power consumption value request has been received (step S301: YES), the communication unit 411 transmits the power consumption value measured by the power consumption measurement unit 611 to the reader (step S302). Thereafter, the process proceeds to step S311.
On the other hand, if it is determined in step 301 that a power consumption value request has not been received (step S301: NO), the process directly proceeds to step S311.

  Next, the CPU related processing unit 661 determines whether or not to make a power consumption suppression rank mitigation request based on the load of the power consumption control device 40 including the CPU related processing unit 661 itself (step S311). Specifically, when the CPU usage rate of the power consumption control device 40 including the CPU-related processing unit 661 itself is equal to or higher than the relaxation request threshold stored in the relaxation request threshold storage unit 662, the CPU-related processing unit 661 includes: If it is less than the mitigation request threshold, it is decided not to make the mitigation request.

When it is determined to perform the relaxation request (step S311: YES), the communication unit 411 transmits the relaxation request to the reader (step S312). Thereafter, the process proceeds to step S331.
On the other hand, if it is determined in step S311 that the mitigation request is not made (step S311: NO), the process proceeds to step S331 as it is.

Next, the communication unit 411 determines whether or not a suppression command (a command to suppress power consumption transmitted by the reader communication unit 411 in step S225 in FIG. 9) has been received (step S331).
If it is determined that the mitigation request has not been received (step S331: NO), the communication unit 411 mitigates permission (in step S252 of FIG. 9, the rank of the power consumption suppression rank transmitted by the reader communication unit 411 is reduced by one rank). It is determined whether or not a signal for permitting the reception of the request has been received (step S332).
If it is determined that a relaxation request has not been received (step S332: NO), the processing in FIG. 8 ends and the processing returns to FIG.

On the other hand, if it is determined in step S331 that a suppression command has been received (step S331: YES), or if it is determined in step S332 that relaxation permission has been received (step S332: YES), the CPU related processing unit 661 is The CPU clock frequency of the power consumption control device 40 including the CPU-related processing unit 661 itself is determined (read from the suppression rank table storage unit 641) and output to the CPU clock setting unit 30 according to the suppression command or the relaxation permission. Then, the CPU clock setting unit 30 sets the CPU clock frequency output from the CPU related processing unit 661 as the CPU clock (step S333).
Thereafter, the process of FIG. 8 ends and the process returns to the process of FIG.

  As described above, in the computer system 1, the device selection unit 631 uses the power consumption average value and the power consumption values of the computers 10-1 to 10-10 (each device targeted for power consumption control). Therefore, it is not necessary to prioritize the power supply to each power consumption control target device, and it is possible to select a device with high power consumption and control power consumption appropriately. .

  Further, since the power consumption control device 40 of the reader determines the power consumption control device 40 that is the takeover destination of the reader, the computer system 1 continues even if the user of the computer system 1 does not determine the takeover destination of the reader. Power consumption control can be performed.

  In addition to the time when the waiting time elapses, the power consumption control device 40 that takes over the reader also takes over the reader and performs power consumption control even when it is determined that the current device cannot perform power consumption control. Even when a failure occurs in the power consumption control device 40 (reader) that performs power consumption control, the power consumption control can be continued.

  Moreover, since the suppression rank determination part 642 determines the rank of power consumption suppression based on the difference which subtracted the power consumption average value from the power consumption of each apparatus determined as the power consumption suppression object, the power consumption value is large. The power consumption value of the device can be greatly reduced, and the power consumption value can be controlled efficiently.

As described above, the power consumption control device 40 can be realized as a part of a computer. That is, a program for realizing all or part of the functions of the power consumption control device 40 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may process each part by. Here, the “computer system” includes an OS and hardware such as peripheral devices.
Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Computer system 10-1 to 10-10 Computer 11 Switch 20 Power supply part 30 CPU clock setting part 40 Power consumption control apparatus 411 Communication part 511 Wait time measurement part 512 Current apparatus state determination part 521 Takeover destination determination part 611 Power consumption measurement part 612 Power consumption value processing unit 613 Device information storage unit 621 Necessity determination unit 622 Upper limit threshold storage unit 631 Device selection unit 641 Suppression rank table storage unit 642 Suppression rank determination unit 651 Relaxation processing unit 652 Relaxation permission threshold storage unit 661 CPU related processing 662 Mitigation request threshold storage unit

Claims (6)

A power consumption value acquisition unit for acquiring the power consumption value of the target device;
A power consumption average value calculation unit that calculates a power consumption average value obtained by dividing the total power consumption value acquired by the power consumption value acquisition unit by the number of the target devices;
A necessity determination unit that determines whether or not power consumption suppression is necessary; and
When the necessity determination unit determines that power consumption is required, a device selection unit that selects a device having a power consumption value larger than the power consumption average value as a device for suppressing power consumption;
A power consumption control device comprising: A reservation receiving unit for receiving the power consumption control takeover reservation;
A takeover destination determination unit for determining a transmission destination device of the power consumption control takeover reservation;
A reservation transmission unit for transmitting the power consumption control takeover reservation to the device determined by the takeover destination determination unit;
Comprising
The takeover destination determination unit determines a transmission destination device of the power consumption control takeover reservation after the reservation receiving unit receives the power consumption control takeover reservation,
The necessity determination unit, when the takeover destination determination unit determines a transmission destination device of the power consumption control takeover reservation, determines whether or not the power consumption suppression is necessary.
The power consumption control apparatus according to claim 1. A waiting time measuring unit for detecting that a predetermined time has elapsed since the reservation receiving unit received the power consumption control takeover reservation;
A current device state determination unit that determines a state of a power consumption control device that is a transmission source of the power consumption control takeover reservation;
Comprising
The necessity determination unit detects that the predetermined time has elapsed after the reservation reception unit has received the power consumption control takeover reservation, or the current device state determination unit When it is determined that the power consumption control device that is the transmission source of the power consumption control takeover reservation cannot perform control to suppress power consumption of the target device, the determination of whether or not to suppress power consumption is started.
The power consumption control device according to claim 2.   For the device selected by the device selector, a suppression rank determination that calculates a difference obtained by subtracting the average power consumption value from the power consumption value of the device and determines a rank of power consumption suppression for the device based on the difference. The power consumption control device according to any one of claims 1 to 3, further comprising: a unit. A power consumption control method for a power consumption control device, comprising:
A power consumption value acquisition step for acquiring a power consumption value of the target device;
A power consumption average value calculating step of calculating a power consumption average value obtained by dividing the total power consumption value acquired in the power consumption value acquisition step by the number of the target devices;
A necessity determination step for determining whether or not to suppress power consumption; and
When it is determined that power consumption suppression is required in the necessity determination step, a device selection step of selecting a device whose power consumption value is larger than the power consumption average value as a device for suppressing power consumption;
A power consumption control method comprising: To a computer as a power consumption control device,
A power consumption value acquisition step for acquiring a power consumption value of the target device;
A power consumption average value calculating step of calculating a power consumption average value obtained by dividing the total power consumption value acquired in the power consumption value acquisition step by the number of the target devices;
A necessity determination step for determining whether or not to suppress power consumption; and
When it is determined that power consumption suppression is required in the necessity determination step, a device selection step of selecting a device whose power consumption value is larger than the power consumption average value as a device for suppressing power consumption;
A program for running

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