CN117590923A - Method, device and equipment for reducing power consumption based on I/O access - Google Patents
Method, device and equipment for reducing power consumption based on I/O access Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/324—Power saving characterised by the action undertaken by lowering clock frequency
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The embodiment of the invention provides a method, a device and equipment for reducing power consumption based on I/O access, relating to the technical field of electronics, wherein the method comprises the following steps: responding to an I/O request initiated by an application program, determining a target process corresponding to the I/O request, wherein the application program is a parallel program comprising a plurality of processes; determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of an application program; determining whether to reduce power consumption according to the waiting attribute of the I/O request and the expected waiting time length of the I/O request and/or the time occupancy rate of the I/O request in the preset time length; and when the power consumption is determined to be reduced, reducing the power consumption of the computing node corresponding to the target process. The method of the invention realizes the reduction of power consumption based on I/O access, and reduces the running cost of the system.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronics, in particular to a method, a device and equipment for reducing power consumption based on I/O access.
Background
Modern high-performance computers, data processing centers and the like often have a large number of computing nodes containing many-core processors in a limited space, which not only causes huge overall power consumption and electricity consumption, but also causes difficult heat dissipation. Although the machine room has an air conditioner and some cabinets adopt a liquid cooling mode, most processors still need to use fans as heat dissipation devices to dissipate heat. When the processor is operated in a high-frequency mode under high load, the fans also need to be operated under high load synchronously, and the reduction of power consumption is of great significance for improving the system performance.
At present, many processors have the function of frequency reduction, so that the frequency can be reduced when the processor is in an idle state, and the rotating speed of a fan can be synchronously reduced at the moment, thereby achieving the purpose of reducing power consumption. Applications in high performance computers and data processing centers are typically parallel programs having multiple processes and using an inter-process communication mechanism, which may be in a dormant state while the application processes are waiting for data to be communicated, enabling the frequency of the respective processor cores and the rotational speed of the fans to be reduced. Typically, the application program will not wait too long for one communication. For parallel programs that wait for frequent communications, if the fan speed is also changing frequently, this can result in a significantly shorter fan life, so that it is often required to be serviced. Not only increases the operation and maintenance costs, but also reduces the stability.
Disclosure of Invention
The embodiment of the invention provides a method, a device and equipment for reducing power consumption based on I/O access, so as to reduce the power consumption based on the I/O access.
In a first aspect, an embodiment of the present invention provides a method for reducing power consumption based on I/O access, including:
responding to an I/O request initiated by an application program, determining a target process corresponding to the I/O request, wherein the application program is a parallel program comprising a plurality of processes;
Determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of an application program;
determining whether to reduce power consumption according to the waiting attribute of the I/O request and the expected waiting time length of the I/O request and/or the time occupancy rate of the I/O request in the preset time length;
and when the power consumption is determined to be reduced, reducing the power consumption of the computing node corresponding to the target process.
In one embodiment, determining a target process to which an I/O request corresponds includes:
when a process in the application program initiates an independent I/O request, the I/O request independently accesses a file or a corresponding position in the file, and the target process comprises a process for initiating the I/O request;
when at least two processes in the application program form a process group, and the process group cooperatively initiates an I/O request through a parallel I/O interface, the target process comprises the process group initiating the I/O request;
when all processes involved in reading and writing file data in an application program initiate an I/O request through part of the processes, the target process comprises various processes for providing data when writing out the data or various processes for obtaining the data when reading in the data.
In one embodiment, determining a wait attribute of an I/O request based on a type of the I/O request includes:
When the I/O request is a file creating operation, a file opening operation, a file closing operation, a file data reading request under a synchronous execution mode, a file data writing request under a synchronous execution mode or a waiting completion instruction under an asynchronous execution mode, waiting of an application program is caused;
when the I/O request is a file data read request in an asynchronous execution mode or a file data write request in an asynchronous execution mode, waiting of the application program is not caused.
In one embodiment, determining whether to reduce power consumption includes:
when the I/O request causes a wait of the application program and the expected wait time of the I/O request is greater than or equal to a first time threshold, it is determined to reduce power consumption.
In one embodiment, reducing power consumption of a computing node corresponding to a target process includes:
when the expected waiting time length of the I/O request is greater than or equal to the first time length threshold value and less than the second time length threshold value, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed;
when the expected waiting time length of the I/O request is greater than or equal to a second time length threshold value, simultaneously reducing the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment;
The second time period threshold is greater than the first time period threshold.
In one embodiment, determining whether to reduce power consumption includes:
when the I/O request causes waiting of the application program and the time occupancy rate of the I/O request in the preset time period is larger than or equal to a first ratio threshold value, determining to reduce the power consumption.
In one embodiment, reducing power consumption of a computing node corresponding to a target process includes:
when the time occupancy rate of the I/O request in the preset duration is greater than or equal to the first ratio threshold and smaller than the second ratio threshold, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed;
when the time occupancy rate of the I/O request in the preset duration is greater than or equal to a second ratio threshold, the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment are reduced at the same time;
the second ratio threshold is greater than the first ratio threshold.
In one embodiment, determining whether to reduce power consumption includes:
and determining to reduce the power consumption when the expected waiting time length of the I/O request is greater than or equal to a first time length threshold value and the time occupancy rate of the I/O request within the preset time length is greater than or equal to a first ratio threshold value when the I/O request can cause the waiting of the application program.
In one embodiment, the expected waiting time of the I/O request is determined according to the product of the basic predicted time of the I/O request and the I/O competition factor of the current moment, wherein the basic predicted time of the I/O request is determined according to the self attribute of the I/O request and the performance attribute of the storage system, and the I/O competition factor of the current moment is used for reflecting the intensity degree of the I/O competition of a plurality of application programs in the system at the current moment, and the I/O competition factor is positively related to the intensity degree of the competition.
In one embodiment, the time occupancy of the I/O requests within the preset duration is a ratio of a total duration occupied by all I/O requests within the preset duration from the current time to the preset duration.
In a second aspect, an embodiment of the present invention provides an apparatus for reducing power consumption based on I/O access, including:
the response module is used for responding to the I/O request initiated by the application program, determining a target process corresponding to the I/O request, wherein the application program is a parallel program comprising a plurality of processes;
the processing module is used for determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of an application program;
the judging module is used for determining whether the power consumption is required to be reduced according to the waiting attribute of the I/O request and the expected waiting duration of the I/O request and/or the time occupancy rate of the I/O request in the preset duration;
And the consumption reduction module is used for reducing the power consumption of the computing node corresponding to the target process when the power consumption is determined to be reduced.
In a third aspect, an embodiment of the present invention provides an electronic device, including:
at least one processor and memory;
the memory stores computer-executable instructions;
at least one processor executing computer-executable instructions stored in memory causes the at least one processor to perform the method of reducing power consumption based on I/O access as described in any of the first aspects.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having stored therein computer-executable instructions, which when executed by a processor are configured to implement a method for reducing power consumption based on I/O access as in any one of the first aspects.
The method, the device and the equipment for reducing the power consumption based on the I/O access, provided by the embodiment of the invention, respond to the I/O request initiated by the application program, determine the target process corresponding to the I/O request, and the application program is a parallel program comprising a plurality of processes; determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of an application program; determining whether to reduce power consumption according to the waiting attribute of the I/O request and the expected waiting time length of the I/O request and/or the time occupancy rate of the I/O request in the preset time length; and when the power consumption is determined to be reduced, reducing the power consumption of the computing node corresponding to the target process. The power consumption is reduced based on the I/O access, and the running cost of the system is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart of a method for reducing power consumption based on I/O access according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an apparatus for reducing power consumption based on I/O access according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the invention.
Specific embodiments of the present invention have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
The invention will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.
Parallel applications having multiple processes and using an inter-process communication mechanism may be put to sleep while the processes of the application are waiting for data to be communicated in order to reduce the frequency of the corresponding processor cores and the rotational speed of the fans. However, since the waiting time of one communication of the application program is not too long, it is actually for the parallel program to frequently wait for communication, if the rotation speed of the fan is also frequently changed, the service life of the fan may be significantly shortened, so that the maintenance of the high performance computer or the data processing center is often required, which not only increases the operation and maintenance cost of the system, but also reduces the stability of the system.
In order to solve the above problems in the prior art, the present application performs detailed analysis on a parallel program having a plurality of processes. Note that parallel programs require data I/O (read/write data from/to persistent storage) operations in addition to waiting for inter-process communication. The processing speed of the data I/O is slower than the processing speed of the inter-process communication waiting, and in particular, the waiting time may be longer when a large amount of data is processed, so that the frequency of the processor core and the working strength (such as the rotation speed of the fan, the flow rate of liquid in the liquid cooling device and the like) of the heat dissipation device (such as the fan, the liquid cooling device and the like) can be reduced when the I/O request is waited, and thus, the application provides a method for reducing the power consumption based on the I/O access so as to realize the reduction of the power consumption based on the I/O access. Further, the present application further contemplates the time required to complete an I/O request in order to avoid a short fan life due to frequent downshifts. It will be appreciated that when the amount of data in the I/O request is small, the time to complete the I/O request will be short, and it is not preferable to reduce the working strength of the heat dissipating device; when the data volume of the I/O request is larger and the time for completing the I/O request reaches a preset time threshold, the working strength of the heat dissipation device is reduced. Therefore, the power consumption of the processor and the heat dissipation device can be reduced based on the I/O access, adverse effects caused by frequent change of the working state of the heat dissipation device are avoided, the operation and maintenance cost of the system is further reduced, and the stability of the system is improved. The present application will be described in detail with reference to specific examples.
FIG. 1 is a flowchart of a method for reducing power consumption based on I/O access according to an embodiment of the present invention. As shown in fig. 1, the method for reducing power consumption based on I/O access provided in this embodiment may include:
s101, responding to an I/O request initiated by an application program, determining a target process corresponding to the I/O request, wherein the application program is a parallel program comprising a plurality of processes.
The application program in this embodiment is a parallel program including a plurality of processes, after the application program initiates an I/O request, in response to the I/O request initiated by the application program, it needs to determine a target process corresponding to the I/O request, and a computing node where the target process is located is a computing node that needs to be down-converted.
When the manner of the application program initiating the I/O request is different, the target process corresponding to the I/O request will also be different, and the different manners of initiating the I/O request will be described below.
For a parallel program containing multiple processes, each process can initiate an independent I/O request, where each I/O request independently accesses a file, or independently accesses a corresponding location in a file, where only one process is contained in a group of processes corresponding to an I/O request. That is, when a process in an application initiates an independent I/O request, the I/O request independently accesses a file or a corresponding location in a file, the target process includes the process that initiated the I/O request.
One process group (or a process group formed by all processes) formed by a plurality of processes in the parallel program can cooperatively initiate the same I/O request by utilizing the parallel I/O interface, and at the moment, a group of processes corresponding to the I/O request contains a plurality of processes. That is, when at least two processes in the application program form a process group, the process group cooperatively initiates an I/O request through the parallel I/O interface, the target process includes the process group that initiated the I/O request.
In addition, there is a common but special case, namely, a parallel program adopts a main process or a partial process to read and write file data, wherein for writing data, all processes firstly aggregate the data to the main process or the partial process, then the main process or the partial process writes the data to the file based on an I/O interface, and after the main process or the partial process finishes writing, all processes continue to calculate downwards; for reading data, the main process or part of processes read data from the file based on the I/O interface, and then broadcast or distribute the read data to all processes. For this case, the set of processes that initiate I/O requests should not be understood as being the only master process or part of the processes, but rather as all processes involved in the reading and writing of data. Because the current calling mode of the I/O request cannot realize such understanding, the application provides a new calling mode, namely, all processes related to file data reading and writing initiate the same I/O request call at the same time, but only one or part of processes can be appointed to read and write data. That is, when all processes involved in reading and writing file data in an application program initiate an I/O request through a part of the processes, a target process includes processes that provide data when writing out data, or processes that obtain data when reading in data.
In summary, the target process corresponding to the I/O request in the present application is all the processes related to the I/O request, including both each process that initiates the I/O request and each process that provides data when writing out data, or each process that obtains data when reading in data.
S102, determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of an application program.
The wait attribute in this embodiment is used to indicate whether an I/O request will cause a wait for an application, and may be determined according to the type of I/O request. The types of I/O requests include creation, opening, closing of files, and reading and writing of file data. The creation, opening and closing of files initiated by an application computing process or thread are typically synchronized operations, which can cause the application to wait. Whether the reading and writing of the file data can cause the waiting of the application program or not, the synchronous execution mode or the asynchronous execution mode needs to be adopted for the reading and writing request. When the synchronous execution mode is adopted, the application program needs to wait for the completion of the file data read request and the write request, and when the asynchronous execution mode is adopted, the computing process or the thread of the application program can continue to execute after the read request or the write request is handed to the asynchronous I/O process or the thread without waiting for the completion of the request. In addition, when an asynchronous execution mode is adopted, there is a special instruction for waiting for completion of a plurality of I/O requests, and if a situation that a corresponding plurality of I/O requests are not completed exists when an application program initiates the instruction, a computing process or a thread of the application program needs to wait. In summary, file creation, opening and closing operations initiated by an application computing process or thread may cause waiting of the application; the read request and the write request of the synchronous execution mode can cause waiting of the application program; asynchronous execution read and write requests do not cause the application to wait, while corresponding wait to complete instructions cause waiting.
That is, in an alternative embodiment, determining the wait attribute of the I/O request according to the type of the I/O request may specifically include: when the I/O request is a file creating operation, a file opening operation, a file closing operation, a file data reading request under a synchronous execution mode, a file data writing request under a synchronous execution mode or a waiting completion instruction under an asynchronous execution mode, waiting of an application program is caused; when the I/O request is a file data read request in an asynchronous execution mode or a file data write request in an asynchronous execution mode, waiting of the application program is not caused.
S103, determining whether to reduce power consumption according to the waiting attribute of the I/O request and the expected waiting duration of the I/O request and/or the time occupancy rate of the I/O request in the preset duration.
The expected waiting time of the I/O request refers to the waiting time required when the I/O request causes waiting, and the expected waiting time of the I/O request can be obtained through a prediction method. It will be appreciated that, on the one hand, the duration of completing the same I/O request on different high performance computers may vary because of the different software and hardware capabilities of the storage system. On the other hand, the wait time for completing the same I/O request at different times on the same high performance computer may also be different because competing uses of the storage system by multiple applications may vary over time. Thus, to obtain the expected wait time of an I/O request, one may start with predicting according to its own attribute and the performance attribute of the storage system, to obtain a basic predicted time of the I/O request, where the own attribute of the I/O request includes, in addition to the type of the I/O request, the amount of data and the degree of dispersion of the data address in the accessed file (for the read request and the write request); for file creation operations, however, some file creation processes result in deleting the contents of existing files of the same name, and the larger the existing file, the longer the creation process. For performance attributes of the storage system, some benchmarking procedures may be utilized. The second aspect is to predict the I/O competition situation in combination with the current I/O competition situation of a plurality of application programs, so as to obtain the I/O competition factor, wherein the more intense the competition is, the larger the I/O competition factor is. The I/O contention factor may be derived based on a ratio between an actual completion duration and a basic prediction duration of a plurality of I/O requests completed within a preset time period prior to the current time. The product of the basic predicted time period and the I/O contention factor is the predicted expected time period of one I/O request. That is, the expected waiting time of the I/O request may be determined according to a product of a basic predicted time of the I/O request and an I/O contention factor of a current time, the basic predicted time of the I/O request being determined according to a self attribute of the I/O request and a performance attribute of the storage system, the I/O contention factor of the current time being used to reflect how hard the I/O contention is for a plurality of applications in the system at the current time, the I/O contention factor being positively correlated with the how hard the I/O contention is.
In this embodiment, the time occupancy rate of the I/O requests in the preset duration is a ratio of the total duration occupied by all I/O requests in the preset duration from the current moment to the preset duration.
According to the waiting attribute of the I/O request, the expected waiting time of the I/O request and/or the time occupancy rate of the I/O request in the preset time, determining whether to reduce the power consumption can be specifically divided into the following three cases:
the first case only considers the wait attribute of the I/O request and the expected wait duration of the I/O request. If the current I/O request can cause the waiting of the parallel program computing process and the expected waiting time length reaches or exceeds a first time length threshold preset by the system, determining to reduce the power consumption of the computing node; otherwise, no consideration is given to the reduction of power consumption. That is, it is determined to reduce power consumption when the wait attribute of the I/O request indicates that the I/O request may cause a wait for the application and the expected wait time for the I/O request is greater than or equal to the first time threshold. One advantage of this approach is that when the expected wait time for an I/O request is small (e.g., corresponding to a small amount of data read and written or an application initiating a fast file open/close operation), the processor is not required to be down-scaled (or the I/O related process or thread is not required to sleep and the processor is released), enabling the program to run quickly.
The second case only considers the waiting attribute of the I/O request and the time occupancy of the I/O request within a preset duration. If the current I/O request causes waiting of the parallel program computing process, further considering whether the total time occupied by all I/O requests in the last period is long or not, if so, determining to reduce the power consumption of the computing node. The specific implementation method can comprise the following steps: and determining the total duration occupied by all I/O requests (aiming at a group of processes corresponding to the I/O requests) in the first time slice length from the current time according to the preset first time slice length, and determining to reduce the power consumption of the computing node when the ratio between the total duration and the first time slice length reaches or exceeds a preset first ratio threshold. That is, when the wait attribute of the I/O request indicates that the I/O request may cause the wait of the application, and the time occupancy of the I/O request within the preset time period is equal to or greater than the first ratio threshold, it is determined that the power consumption is to be reduced.
The third case comprehensively considers the waiting attribute of the I/O request, the expected waiting duration of the I/O request and the time occupancy rate of the I/O request in the preset duration, combines the two schemes, and determines to reduce the power consumption when the conditions are simultaneously met. That is, when the wait attribute of the I/O request indicates that the I/O request may cause the application to wait, the expected wait time period of the I/O request is equal to or greater than the first time period threshold and the time occupancy of the I/O request within the preset time period is equal to or greater than the first ratio threshold, it is determined that the power consumption is to be reduced.
And S104, when the power consumption is determined to be reduced, reducing the power consumption of the computing node corresponding to the target process.
After determining that the power consumption is to be reduced, the reduction in power consumption may be achieved by reducing the power consumption of the computing node to which the target process corresponds. The specific implementation manner of reducing the power consumption is not limited in this embodiment.
In the method for reducing power consumption based on I/O access provided by the embodiment, in response to an I/O request initiated by an application program, a target process corresponding to the I/O request is determined, and the application program is a parallel program comprising a plurality of processes; determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of an application program; determining whether to reduce power consumption according to the waiting attribute of the I/O request and the expected waiting time length of the I/O request and/or the time occupancy rate of the I/O request in the preset time length; and when the power consumption is determined to be reduced, reducing the power consumption of the computing node corresponding to the target process. The power consumption is reduced based on the I/O access, and the running cost of the system is reduced. The magnitude of the power consumption reduction is greater compared to the prior art.
On the basis of reducing the power consumption in the above embodiment, different consumption reduction modes are adopted for different situations, so as to further improve the stability of the system.
The case where the power consumption is determined to be reduced is described first with respect to the case where the I/O request causes a wait of the application program, and the expected wait time length of the I/O request is equal to or greater than the first time length threshold.
In this case, if the expected waiting time period of the I/O request does not reach the second time period threshold value preset by the system, the operating frequency of the processor (computing node) is only reduced, without changing the operating state of the heat dissipating device; when the expected waiting time of the I/O request reaches or exceeds a second time threshold preset by the system, the working frequency of the processor (the computing node) and the working strength of the heat dissipation device are reduced at the same time. By setting the second time threshold value larger than the first time threshold value, frequent changes of the working state of the heat radiation equipment can be effectively avoided, and the situation that the service life of the heat radiation equipment is shortened due to frequent changes of the working state of the heat radiation equipment can be effectively avoided. The method for reducing the operating frequency of the processor in this embodiment includes letting the computing process or thread of the application program stay dormant while waiting for the I/O request, or explicitly invoking a down instruction to reduce the processor frequency. After the waiting of the I/O request is completed, the original operating frequency of the processor and the original operating strength of the heat dissipating device can be recovered.
That is, in the method for reducing power consumption based on I/O access provided in this embodiment, power consumption of a computing node corresponding to a target process is reduced, which may specifically include: when the expected waiting time length of the I/O request is greater than or equal to the first time length threshold value and less than the second time length threshold value, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed; when the expected waiting time length of the I/O request is greater than or equal to a second time length threshold value, simultaneously reducing the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment; the second time period threshold is greater than the first time period threshold. Further, the energy consumption and the reliability of the heat dissipation device can be comprehensively considered to set the second duration threshold, for example, when the energy consumption and the reliability of the heat dissipation device are high, the second duration threshold can be reduced; the second duration threshold may be increased when the heat sink device has low energy consumption and low reliability. I.e. the second time period threshold is positively correlated with the power consumption and reliability of the heat sink device.
The following description will be given for the case where the I/O request causes waiting of the application program, and the time occupancy rate of the I/O request in the preset period is equal to or greater than the first ratio threshold, and it is determined that power consumption is to be reduced.
In this case, the total duration occupied by all I/O requests in the last period of time may be checked, and if the ratio between the total duration and the first time slice length does not reach the preset second ratio threshold, the operating frequency of the processor (computing node) is only reduced, without changing the operating state of the heat dissipating device; otherwise, the operating frequency of the processor (computing node) and the operating strength of the heat sink are reduced at the same time. By setting the second ratio threshold value larger than the first ratio threshold value, frequent changes of the working state of the heat radiation equipment can be effectively avoided, and the situation that the service life of the heat radiation equipment is shortened due to frequent changes of the working state of the heat radiation equipment can be effectively avoided. The implementation technique for reducing the operating frequency of the processor at this time may be to explicitly call a down instruction to reduce the processor frequency.
In this case, the processor frequency of the application program during the execution of the partial calculation is reduced, and thus the running speed of the application program is reduced to some extent. The impact on the application speed reduction may further be adjusted by adjusting the magnitude of the first ratio threshold. In particular, the impact of the reduced application speed may be reduced by increasing the first ratio threshold.
Further, in order to maximize economic benefit, different first ratio thresholds may be used in the electricity consumption peak period and the electricity consumption low peak period, or in the electricity price high-level period and the electricity price low-level period. Specifically, a smaller first ratio threshold can be adopted in the electricity consumption peak period or the electricity price high-order period; a larger first ratio threshold is employed during the low peak electricity usage period or the low price electricity period.
In this embodiment, when the working frequency of the processor or the working strength of the heat dissipating device is reduced, the power consumption recovery time needs to be recorded or updated, and the power consumption recovery time is the current time plus the preset time slice length. And when the processor time reaches the power consumption recovery time, recovering the original working frequency of the processor and the original working strength of the heat dissipation equipment.
In an alternative embodiment, a correspondence between the time occupancy rate of the I/O request and the operating frequency of the processor (computing node) and/or the operating strength of the heat dissipating device in a preset duration may be pre-established, that is, the operating frequencies/operating strengths of the plurality of gears may be pre-set to correspond to different time occupancy rates. The correspondence between them satisfies: the working frequency/working intensity is inversely related to the time occupancy rate, and the greater the time occupancy rate of the I/O request in the preset duration, the lower the working frequency of the processor or the working intensity of the heat dissipation device. And determining the corresponding working frequency of the computing node and the corresponding working strength of the heat dissipation equipment according to the current time occupancy rate and the pre-established corresponding relation, so as to reduce the power consumption.
That is, in the method for reducing power consumption based on I/O access provided in this embodiment, power consumption of a computing node corresponding to a target process is reduced, which may specifically include: when the time occupancy rate of the I/O request in the preset duration is greater than or equal to the first ratio threshold and smaller than the second ratio threshold, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed; when the time occupancy rate of the I/O request in the preset duration is greater than or equal to a second ratio threshold, the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment are reduced at the same time; the second ratio threshold is greater than the first ratio threshold. Further, the second ratio threshold may be set by comprehensively considering the energy consumption and the reliability of the heat dissipating device, for example, when the energy consumption and the reliability of the heat dissipating device are high, the second ratio threshold may be reduced; the second ratio threshold may be increased when the heat sink device has low power consumption and low reliability. I.e. the second ratio threshold is positively correlated with the energy consumption and reliability of the heat sink device.
Finally, aiming at the situation that the I/O request can cause waiting of an application program, the expected waiting time length of the I/O request is larger than or equal to a first time length threshold value, the time occupancy rate of the I/O request in the preset time length is larger than or equal to a first ratio threshold value, and the power consumption is determined to be reduced to explain. In this case, only when the expected waiting time of the I/O request is greater than or equal to the second time threshold and the time occupancy rate of the I/O request within the preset time period is greater than or equal to the second ratio threshold, the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipating device are simultaneously reduced; otherwise, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed.
Different consumption reduction modes are adopted according to different conditions, so that frequent changes of the working state of the heat radiation equipment are effectively avoided, and the situation that the service life of the heat radiation equipment is shortened due to the frequent changes of the working state of the heat radiation equipment can be effectively avoided. Further reduces the operation and maintenance cost of the system and improves the stability of the system.
Fig. 2 is a schematic structural diagram of an apparatus for reducing power consumption based on I/O access according to an embodiment of the present invention. As shown in fig. 2, the apparatus 20 for reducing power consumption based on I/O access provided in this embodiment may include: a response module 201, a processing module 202, a judging module 203 and a consumption reducing module 204.
A response module 201, configured to determine, in response to an I/O request initiated by an application program, a target process corresponding to the I/O request, where the application program is a parallel program including a plurality of processes;
a processing module 202, configured to determine a wait attribute of the I/O request according to a type of the I/O request, where the wait attribute is used to indicate whether the I/O request causes a wait of the application program;
a judging module 203, configured to determine whether to reduce power consumption according to a waiting attribute of the I/O request, and an expected waiting duration of the I/O request and/or a time occupancy rate of the I/O request within a preset duration;
And the consumption reduction module 204 is configured to reduce power consumption of the computing node corresponding to the target process when it is determined that power consumption is to be reduced.
The device of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 1, and its implementation principle and technical effects are similar, and are not described here again.
In an alternative embodiment, the response module 201 is configured to determine a target process corresponding to the I/O request, and may specifically include:
when a process in the application program initiates an independent I/O request, the I/O request independently accesses a file or a corresponding position in the file, and the target process comprises a process for initiating the I/O request;
when at least two processes in the application program form a process group, and the process group cooperatively initiates an I/O request through a parallel I/O interface, the target process comprises the process group initiating the I/O request;
when all processes involved in reading and writing file data in an application program initiate an I/O request through part of the processes, the target process comprises various processes for providing data when writing out the data or various processes for obtaining the data when reading in the data.
In an alternative embodiment, the processing module 202 is configured to determine a waiting attribute of the I/O request according to a type of the I/O request, and may specifically include:
When the I/O request is a file creating operation, a file opening operation, a file closing operation, a file data reading request under a synchronous execution mode, a file data writing request under a synchronous execution mode or a waiting completion instruction under an asynchronous execution mode, waiting of an application program is caused;
when the I/O request is a file data read request in an asynchronous execution mode or a file data write request in an asynchronous execution mode, waiting of the application program is not caused.
In an alternative embodiment, the determining module 203 is configured to determine whether to reduce power consumption, and may specifically include:
when the I/O request causes a wait of the application program and the expected wait time of the I/O request is greater than or equal to a first time threshold, it is determined to reduce power consumption.
In an alternative embodiment, the consumption reduction module 204 is configured to reduce power consumption of a computing node corresponding to the target process, and may specifically include:
when the expected waiting time length of the I/O request is greater than or equal to the first time length threshold value and less than the second time length threshold value, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed;
when the expected waiting time length of the I/O request is greater than or equal to a second time length threshold value, simultaneously reducing the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment;
The second time period threshold is greater than the first time period threshold.
In an alternative embodiment, the determining module 203 is configured to determine whether to reduce power consumption, and may specifically include:
when the I/O request causes waiting of the application program and the time occupancy rate of the I/O request in the preset time period is larger than or equal to a first ratio threshold value, determining to reduce the power consumption.
In an alternative embodiment, the consumption reduction module 204 is configured to reduce power consumption of a computing node corresponding to the target process, and may specifically include:
when the time occupancy rate of the I/O request in the preset duration is greater than or equal to the first ratio threshold and smaller than the second ratio threshold, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed;
when the time occupancy rate of the I/O request in the preset duration is greater than or equal to a second ratio threshold, the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment are reduced at the same time;
the second ratio threshold is greater than the first ratio threshold.
In an alternative embodiment, the determining module 203 is configured to determine whether to reduce power consumption, and may specifically include:
and determining to reduce the power consumption when the expected waiting time length of the I/O request is greater than or equal to a first time length threshold value and the time occupancy rate of the I/O request within the preset time length is greater than or equal to a first ratio threshold value when the I/O request can cause the waiting of the application program.
In an alternative embodiment, the expected waiting time of the I/O request is determined according to the product of the basic predicted time of the I/O request and the I/O competition factor of the current moment, where the basic predicted time of the I/O request is determined according to the self attribute of the I/O request and the performance attribute of the storage system, and the I/O competition factor of the current moment is used to reflect the severity of the I/O competition of the plurality of applications in the system at the current moment, and the I/O competition factor is positively related to the severity of the competition.
In an alternative embodiment, the time occupancy of the I/O requests in the preset time period is a ratio of a total time period occupied by all I/O requests in the preset time period from the current time to the preset time period.
An embodiment of the present invention further provides an electronic device, and referring to fig. 3, the embodiment of the present invention is illustrated by taking fig. 3 as an example only, and the present invention is not limited thereto. Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the invention. As shown in fig. 3, the electronic device 30 provided in this embodiment may include: a memory 301, a processor 302, and a bus 303. Wherein the bus 303 is used to enable connections between the elements.
The memory 301 stores a computer program, which when executed by the processor 302, may implement the technical solutions of any of the method embodiments described above.
Wherein the memory 301 and the processor 302 are electrically connected, either directly or indirectly, to enable transmission or interaction of data. For example, the elements may be electrically coupled to each other via one or more communication buses or signal lines, such as bus 303. The memory 301 stores therein a computer program implementing … …, including at least one software functional module that may be stored in the memory 301 in the form of software or firmware, and the processor 302 executes the software program and the module stored in the memory 301 to thereby perform various functional applications and data processing.
The Memory 301 may be, but is not limited to, random access Memory (Random Access Memory, RAM), read Only Memory (ROM), programmable Read Only Memory (Programmable Read-Only Memory, PROM), erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc. The memory 301 is used for storing a program, and the processor 302 executes the program after receiving an execution instruction. Further, the software programs and modules within the memory 301 may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor 302 may be an integrated circuit chip with signal processing capabilities. The processor 302 may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), and the like. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. It will be appreciated that the configuration of fig. 3 is merely illustrative and may include more or fewer components than shown in fig. 3 or have a different configuration than shown in fig. 3. The components shown in fig. 3 may be implemented in hardware and/or software.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the technical solution of any of the method embodiments described above.
The various embodiments in this disclosure are described in a progressive manner, and identical and similar parts of the various embodiments are all referred to each other, and each embodiment is mainly described as different from other embodiments.
The scope of the present disclosure is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present disclosure by those skilled in the art without departing from the scope and spirit of the disclosure. Such modifications and variations are intended to be included herein within the scope of the following claims and their equivalents.
Claims (13)
1. A method for reducing power consumption based on I/O access, comprising:
responding to an I/O request initiated by an application program, determining a target process corresponding to the I/O request, wherein the application program is a parallel program comprising a plurality of processes;
determining a waiting attribute of the I/O request according to the type of the I/O request, wherein the waiting attribute is used for indicating whether the I/O request can cause waiting of the application program;
determining whether to reduce power consumption according to the waiting attribute of the I/O request and the expected waiting duration of the I/O request and/or the time occupancy rate of the I/O request in the preset duration;
and when the power consumption is determined to be reduced, reducing the power consumption of the computing node corresponding to the target process.
2. The method of claim 1, wherein the determining the target process to which the I/O request corresponds comprises:
When a process in the application program initiates an independent I/O request, the I/O request independently accesses a file or a corresponding position in the file, the target process comprises a process for initiating the I/O request;
when at least two processes in the application program form a process group, and the process group cooperatively initiates the I/O request through a parallel I/O interface, the target process comprises the process group initiating the I/O request;
when all processes related to file data reading and writing in the application program initiate the I/O request through part of the processes, the target process comprises all processes for providing data when writing out the data or all processes for obtaining the data when reading in the data.
3. The method of claim 1, wherein determining the wait attribute of the I/O request based on the type of the I/O request comprises:
when the I/O request is a file creating operation, a file opening operation, a file closing operation, a file data reading request under a synchronous execution mode, a file data writing request under a synchronous execution mode or a waiting completion instruction under an asynchronous execution mode, waiting of the application program is caused;
When the I/O request is a file data read request in an asynchronous execution mode or a file data write request in an asynchronous execution mode, waiting of the application program is not caused.
4. The method of claim 1, wherein the determining whether to reduce power consumption comprises:
when the I/O request causes a wait of the application and an expected wait time of the I/O request is greater than or equal to a first time threshold, determining to reduce power consumption.
5. The method of claim 4, wherein the reducing power consumption of the computing node corresponding to the target process comprises:
when the expected waiting time length of the I/O request is greater than or equal to a first time length threshold value and less than a second time length threshold value, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed;
when the expected waiting time length of the I/O request is greater than or equal to a second time length threshold, simultaneously reducing the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment;
the second time duration threshold is greater than the first time duration threshold.
6. The method of claim 1, wherein the determining whether to reduce power consumption comprises:
And when the I/O request can cause the waiting of the application program and the time occupancy rate of the I/O request in the preset duration is greater than or equal to a first ratio threshold, determining to reduce the power consumption.
7. The method of claim 6, wherein the reducing power consumption of the computing node corresponding to the target process comprises:
when the time occupancy rate of the I/O request in the preset duration is larger than or equal to a first ratio threshold and smaller than a second ratio threshold, only the working frequency of the computing node corresponding to the target process is reduced, and the working state of the heat radiation equipment is not changed;
when the time occupancy rate of the I/O request in the preset duration is greater than or equal to a second ratio threshold, the working frequency of the computing node corresponding to the target process and the working strength of the heat dissipation equipment are reduced at the same time;
the second ratio threshold is greater than the first ratio threshold.
8. The method of claim 1, wherein the determining whether to reduce power consumption comprises:
and determining to reduce power consumption when the I/O request can cause waiting of the application program, the expected waiting time length of the I/O request is larger than or equal to a first time length threshold value, and the time occupancy rate of the I/O request in the preset time length is larger than or equal to a first ratio threshold value.
9. The method of any of claims 1-8, wherein the expected wait time of the I/O request is determined according to a product of a basic predicted time of the I/O request and an I/O contention factor at a current time, the basic predicted time of the I/O request is determined according to a self attribute of the I/O request and a performance attribute of a storage system, and the I/O contention factor at the current time is used to reflect how hard a plurality of applications in the system compete for I/O, and the I/O contention factor is positively correlated with the how hard the I/O contention is.
10. The method according to any one of claims 1-8, wherein the time occupancy of I/O requests within the preset time period is a ratio of a total time period occupied by all I/O requests within the preset time period from the current time point back to the preset time period.
11. An apparatus for reducing power consumption based on I/O access, comprising:
the response module is used for responding to an I/O request initiated by an application program, determining a target process corresponding to the I/O request, wherein the application program is a parallel program comprising a plurality of processes;
a processing module, configured to determine a wait attribute of the I/O request according to a type of the I/O request, where the wait attribute is used to indicate whether the I/O request causes a wait of the application program;
The judging module is used for determining whether the power consumption is to be reduced or not according to the waiting attribute of the I/O request and the expected waiting duration of the I/O request and/or the time occupancy rate of the I/O request in the preset duration;
and the consumption reduction module is used for reducing the power consumption of the computing node corresponding to the target process when the power consumption is determined to be reduced.
12. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory cause the at least one processor to perform the method of reducing power consumption based on I/O access as recited in any of claims 1-10.
13. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are for implementing the I/O access based power consumption reduction method of any of claims 1-10.
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