CN112748792A - Method, system, medium, and apparatus for reducing power consumption of dynamic random access memory - Google Patents
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Abstract
The invention provides a method, a system, a medium and a device for reducing the power consumption of a dynamic random access memory, wherein the method comprises the following steps: the dynamic random access memory comprises a control and compression program area, a table entry area and a reserved compression area respectively; compressing data to obtain compressed data, storing the compressed data into the reserved compression area, and recording a data area to be compressed, which is originally stored in the data, and the position of the reserved compression area, in which the compressed data corresponding to the data is stored, through a table entry; combining the data area to be compressed and the reserved compression area, which are originally stored in the data, into the reserved compression area, sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed, which does not store the data. The invention discloses a method, a system, a medium and a device for reducing the power consumption of a dynamic random access memory, which are used for reducing the power consumption of the dynamic random access memory in a self-refresh state.
Description
Technical Field
The present invention relates to the field of memory technologies, and in particular, to a method, system, medium, and apparatus for reducing power consumption of a dynamic random access memory.
Background
After the embedded system is in standby, the data of the dynamic random access memory is not accessed any more, and the dynamic random access memory is set to be in a self-refresh mode, so that the standby power consumption is greatly reduced. However, in a system with multiple dynamic random access memories, the power consumption superposition of the dynamic random access memories in the self-refresh mode still remains a major problem of consuming system power.
Therefore, it is desirable to solve the problem of system power consumption of the dynamic random access memory in the self-refresh mode.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a method, system, medium and apparatus for reducing power consumption of a dynamic random access memory, so as to solve the problem of system power consumption of the dynamic random access memory in a self-refresh mode in the prior art.
To achieve the above and other related objects, the present invention provides a method for reducing power consumption of a dynamic random access memory, comprising the steps of: before a system enters a standby state, the access of all dynamic random access memories is idled, wherein the dynamic random access memories comprise control and compression program areas, table entry areas and reserved compression areas; compressing data to obtain compressed data, storing the compressed data into the reserved compression area, and recording a data area to be compressed, which is originally stored in the data, and the position of the reserved compression area, in which the compressed data corresponding to the data is stored, through a table entry; combining the data area to be compressed and the reserved compression area, which are originally stored in the data, into the reserved compression area, sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed, which does not store the data.
In an embodiment of the present invention, the compressing data to obtain compressed data, storing the compressed data in the reserved compression area, and recording, by using a table entry, a to-be-compressed data area where the data is originally stored and a position of the reserved compression area where the compressed data corresponding to the data is stored in include: dividing a data area to be compressed into a first data area to be compressed according to a preset rule, compressing data corresponding to the first data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the first data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry.
In an embodiment of the present invention, the merging the to-be-compressed data area where the data is originally stored and the reserved compression area into the reserved compression area, sequentially performing data compression until no data needs to be compressed, and closing the to-be-compressed data area where no data is stored includes: judging whether the data area to be compressed still has data to be compressed, and classifying the first data area to be compressed into a reserved compression area when the data still needs to be compressed; dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing data corresponding to the second data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry; and sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data.
In an embodiment of the present invention, the method further includes sequentially decompressing the compressed data according to a reverse order of a data compression order, and storing the decompressed data in the original data region to be compressed based on the table entry.
To achieve the above object, the present invention further provides a system for reducing power consumption of a dynamic random access memory, comprising: the device comprises a setting module, a compression module and a merging module; the receiving module is used for setting the DRAM to respectively comprise a control and compression program area, a table entry area and a reserved compression area; the compression module is used for compressing data to obtain compressed data, storing the compressed data into the reserved compression area, and recording a data area to be compressed, which is originally stored in the data, and the position of the reserved compression area, in which the compressed data corresponding to the data is stored, through a table entry; the merging module is used for merging the data area to be compressed and the reserved compression area, in which the data are originally stored, into the reserved compression area, sequentially compressing the data until no data need to be compressed, and closing the data area to be compressed, in which the data are not stored.
In an embodiment of the present invention, the compression module is further configured to divide the data area to be compressed into a first data area to be compressed according to a preset rule, compress data corresponding to the first data area to be compressed to obtain compressed data, store the compressed data in the reserved compression area, and record the first data area to be compressed corresponding to the data and a position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry.
In an embodiment of the present invention, the merging module is further configured to determine whether there is data to be compressed in the data area to be compressed, and when there is data to be compressed, classify the first data area to be compressed as a reserved compressed area; dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing data corresponding to the second data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry; and sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data.
In an embodiment of the present invention, the apparatus further includes a decompression module, configured to decompress the compressed data in sequence according to a reverse order of a data compression sequence, and store the decompressed data in an original data region to be compressed based on the table entry.
To achieve the above object, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, implements any of the above methods of reducing power consumption of a dynamic random access memory.
In order to achieve the above object, the present invention further provides an apparatus for reducing power consumption of a dynamic random access memory, including: a processor and a memory; the memory is used for storing a computer program; the memory comprises a control and compression program area, an item area, a reserved compression area and a data area to be compressed; the processor is connected with the memory and is used for executing the computer program stored in the memory so as to enable the device for reducing the power consumption of the dynamic random access memory to execute any one of the above methods for reducing the power consumption of the dynamic random access memory.
As described above, the method, system, medium, and apparatus for reducing power consumption of a dynamic random access memory according to the present invention have the following advantages: for reducing the power consumption of the dynamic random access memory in the self-refresh state.
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FIG. 1 is a flow chart illustrating a method for reducing power consumption of a DRAM according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an embodiment of a method for reducing power consumption of a DRAM according to the present invention;
FIG. 3 is a block diagram illustrating an embodiment of a system for reducing power consumption of a DRAM according to the present invention;
FIG. 4 is a schematic diagram illustrating an embodiment of a device for reducing power consumption of a DRAM according to the present invention.
Description of the element reference numerals
31 setting module
32 compression module
33 merging module
41 processor
42 memory
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, so that the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of the components in actual implementation can be changed freely, and the layout of the components can be more complicated.
The invention discloses a method, a system, a medium and a device for reducing the power consumption of a dynamic random access memory, which are used for reducing the power consumption of the dynamic random access memory in a self-refresh state.
As shown in fig. 1, in an embodiment, the method for reducing power consumption of a dynamic random access memory of the present invention includes the following steps:
and step S11, before the system enters the standby state, idling the access of all dynamic random access memories, wherein the dynamic random access memories comprise a control and compression program area, an item area and a reserved compression area.
Specifically, the system includes but is not limited to an embedded system, the access of all the dynamic random access memories is idle before the system enters a standby state, and after the embedded system is in the standby state, the data of the dynamic random access memories are not accessed any more due to the access of all the idle dynamic random access memories, and at the moment, the dynamic random access memories are set to be in a self-refresh mode, so that the standby power consumption is greatly reduced. However, in a system with multiple dynamic random access memories, the power consumption superposition of the dynamic random access memories in the self-refresh mode still remains a major problem of consuming system power. Therefore, further reduction in power consumption of the dynamic random access memory is required. The dynamic random access memory comprises a control and compression program area, an item area and a reserved compression area. The control and compression program area is used for storing control and compression programs of subsequent compressed data, the table entry area is used for storing table entries, and the table entries are used for recording the data area to be compressed, which is originally stored in the data, and the position of a reserved compression area, in which the compressed data corresponding to the data is stored.
Step S12, compressing the data to obtain compressed data, storing the compressed data in the reserved compression area, and recording the originally stored data area to be compressed and the position of the reserved compression area where the compressed data corresponding to the data is stored in through the table entry.
Specifically, a data area to be compressed is divided into a first data area to be compressed according to a preset rule, data corresponding to the first data area to be compressed is compressed to obtain compressed data, the compressed data is stored in the reserved compression area, and the first data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored are recorded through a table entry. The method comprises the steps of dividing a data area to be compressed into a first data area to be compressed according to a preset rule, compressing first data corresponding to the first data area to be compressed to obtain first compressed data, storing the first compressed data into a reserved compression area, and recording the first data area to be compressed corresponding to the first data and the position of the reserved compression area where the first compressed data corresponding to the first data is stored through a table entry.
And step S13, combining the data area to be compressed and the reserved compression area where the data are originally stored into the reserved compression area, sequentially compressing the data until no data need to be compressed, and closing the data area to be compressed where no data are stored.
Specifically, whether data in the data area to be compressed still needs to be compressed is judged, and when data still needs to be compressed, the first data area to be compressed is classified as a reserved compression area; dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing data corresponding to the second data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry; and sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data. As shown in fig. 2: that is, it is determined whether there is any data to be compressed in the data area to be compressed, and when there is any data to be compressed, the first data area to be compressed is classified as a reserved compressed area, because the first data in the first data area to be compressed has been compressed into the first compressed data and is stored in the reserved compressed area. Therefore, the first data area to be compressed is already empty, and therefore, the first data area to be compressed is classified as a reserved compressed area. Dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing second data corresponding to the second data area to be compressed to obtain second compressed data, storing the second compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the second data and the position of the reserved compression area where the second compressed data corresponding to the second data is stored through a table entry. The preset rule is as follows: and dividing the second data of the second data area to be compressed, wherein the storage space required after the second data are compressed into second compressed data is less than or equal to the reserved compression area. Or the storage space required by the second data of the second data area to be compressed is less than or equal to the reserved compression area. And sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data.
For example, after the second data corresponding to the second data area to be compressed is compressed to obtain second compressed data, and the second compressed data is stored in the reserved compression area, no data needs to be compressed, and the data area to be compressed where no data is stored is closed. Or, after the second data corresponding to the second data area to be compressed is compressed to obtain second compressed data and the second compressed data is stored in the reserved compression area, the data needs to be compressed. The second data area to be compressed is classified as a reserved compressed area because the second data in the second data area to be compressed has been compressed into the second compressed data and stored in the reserved compressed area. Therefore, the second data area to be compressed is already empty, and therefore, the second data area to be compressed is classified as a reserved compression area. Dividing a data area to be compressed into a third data area to be compressed according to a preset rule, compressing third data corresponding to the third data area to be compressed to obtain third compressed data, storing the third compressed data into the reserved compression area, and recording the third data area to be compressed corresponding to the third data and the position of the reserved compression area where the third compressed data corresponding to the third data is stored through a table entry. And sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data. And the data area to be compressed, in which the data is not stored, comprises a data area to be compressed, in which the originally stored data is compressed and stored in a reserved compression area, and a data area to be compressed, in which the originally stored data is not stored. And closing the to-be-compressed data area which does not store the data, and not refreshing the to-be-compressed data area any more, so that the power consumption of the dynamic random access memory in a self-refreshing state can be reduced.
Specifically, the method further comprises the steps of sequentially decompressing the compressed data according to the reverse order of the data compression sequence, and storing the decompressed data into the original data area to be compressed based on the table entry. After the system is awakened, reversely decompressing the data and restoring the data to the original data area to be compressed according to the data area to be compressed corresponding to the data in the table entry and the position of the reserved compression area in which the compressed data corresponding to the data is stored, namely, the first data is compressed into the first compressed data and is finally decompressed and restored.
Specifically, the method further comprises the step of selecting the corresponding data area to be compressed based on the priority of the data. For example, the data with the lowest priority is selected as the first data, and the data with the second lowest priority is selected as the second data, so that the corresponding data areas to be compressed of the data are selected in sequence. That is, for different priorities, different code data segment arrangements can be organized in a reverse order, and for the code which is needed to run most urgently after the system wakes up as the last data, the last data is compressed and called as the last compressed data, which means that the last compressed data can be decompressed most quickly.
As shown in fig. 2, in an embodiment, the system for reducing power consumption of a dynamic random access memory of the present invention includes a setting module 31, a compressing module 32, and a combining module 33.
The setting module 31 is configured to idle access to all dynamic random access memories before the system enters a standby state, where the dynamic random access memories include a control and compression program area, an entry area, and a reserved compression area.
The compression module 32 is configured to compress data to obtain compressed data, store the compressed data in the reserved compression area, and record, through a table entry, a data area to be compressed where the data is originally stored and a position of the reserved compression area where the compressed data corresponding to the data is stored.
The merging module 33 is configured to merge a to-be-compressed data area where the data is originally stored and a reserved compression area into a reserved compression area, sequentially compress the data until no data needs to be compressed, and close the to-be-compressed data area where no data is stored.
The compression module 32 is further configured to segment a data area to be compressed into a first data area to be compressed according to a preset rule, compress data corresponding to the first data area to be compressed to obtain compressed data, store the compressed data into the reserved compression area, and record, through a table entry, the first data area to be compressed corresponding to the data and a position of the reserved compression area into which the compressed data corresponding to the data is stored.
The merging module 33 is further configured to determine whether there is data to be compressed in the data area to be compressed, and classify the first data area to be compressed as a reserved compressed area when there is data to be compressed; dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing data corresponding to the second data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry; and sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data.
The decompression module is used for sequentially decompressing the compressed data according to the reverse order of the data compression order and storing the decompressed data into the original data area to be compressed based on the table entry.
It should be noted that the structures and principles of the setting module 31, the compressing module 32 and the merging module 33 correspond to the steps in the method for reducing the power consumption of the dynamic random access memory one by one, and therefore, no further description is provided herein.
It should be noted that the division of the modules of the above system is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the x module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the x module may be called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
In an embodiment of the present invention, the present invention further includes a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement any of the above methods for reducing power consumption of a dynamic random access memory.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
As shown in fig. 4, in an embodiment, the apparatus for reducing power consumption of a dynamic random access memory of the present invention includes: a processor 41 and a memory 42; the memory 42 is used for storing computer programs; the memory 42 includes a control and compression program area, an entry area, a reserved compression area and a data area to be compressed; the processor 41 is connected to the memory 42, and is configured to execute the computer program stored in the memory 42, so that the apparatus for reducing power consumption of dynamic random access memory performs any one of the methods for reducing power consumption of dynamic random access memory.
Specifically, the memory 42 includes: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
Preferably, the Processor 41 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components.
In summary, the method, system, medium, and apparatus for reducing power consumption of a dynamic random access memory according to the present invention are used to reduce power consumption of a dynamic random access memory in a self-refresh state. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A method for reducing power consumption of a dynamic random access memory, comprising the steps of:
before a system enters a standby state, the access of all dynamic random access memories is idled, wherein the dynamic random access memories comprise control and compression program areas, table entry areas and reserved compression areas;
compressing data to obtain compressed data, storing the compressed data into the reserved compression area, and recording a data area to be compressed, which is originally stored in the data, and the position of the reserved compression area, in which the compressed data corresponding to the data is stored, through a table entry;
combining the data area to be compressed and the reserved compression area, which are originally stored in the data, into the reserved compression area, sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed, which does not store the data.
2. The method according to claim 1, wherein the compressing data to obtain compressed data, storing the compressed data in the reserved compression area, and recording a data area to be compressed, where the data is originally stored, and a position of the reserved compression area, where the compressed data corresponding to the data is stored, in the data area through a table entry includes:
dividing a data area to be compressed into a first data area to be compressed according to a preset rule, compressing data corresponding to the first data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the first data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry.
3. The method according to claim 2, wherein the step of merging the data area to be compressed where the data is originally stored and the reserved compression area into a reserved compression area, sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed where no data is stored comprises:
judging whether the data area to be compressed still has data to be compressed, and classifying the first data area to be compressed into a reserved compression area when the data still needs to be compressed; dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing data corresponding to the second data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry; and sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data.
4. The method according to claim 1, further comprising decompressing the compressed data in sequence according to a reverse order of the data compression order, and storing the decompressed data in the original data region to be compressed based on the entry.
5. A system for reducing power consumption of a dynamic random access memory, comprising: the device comprises a setting module, a compression module and a merging module;
the setting module is used for idling the access of all dynamic random access memories before the system enters the standby state, and the dynamic random access memories comprise control and compression program areas, table entry areas and reserved compression areas;
the compression module is used for compressing data to obtain compressed data, storing the compressed data into the reserved compression area, and recording a data area to be compressed, which is originally stored in the data, and the position of the reserved compression area, in which the compressed data corresponding to the data is stored, through a table entry;
the merging module is used for merging the data area to be compressed and the reserved compression area, in which the data are originally stored, into the reserved compression area, sequentially compressing the data until no data need to be compressed, and closing the data area to be compressed, in which the data are not stored.
6. The system for reducing power consumption of dynamic random access memory according to claim 5, wherein the compression module is further configured to partition a data area to be compressed into a first data area to be compressed according to a preset rule, compress data corresponding to the first data area to be compressed to obtain compressed data, store the compressed data into the reserved compression area, and record the first data area to be compressed corresponding to the data and a position of the reserved compression area where the compressed data corresponding to the data is stored through an entry.
7. The system for reducing power consumption of dynamic random access memory according to claim 6, wherein the merging module is further configured to determine whether there is any more data to be compressed in the data area to be compressed, and when there is any more data to be compressed, classify the first data area to be compressed as a reserved compressed area; dividing a data area to be compressed into a second data area to be compressed according to a preset rule, compressing data corresponding to the second data area to be compressed to obtain compressed data, storing the compressed data into the reserved compression area, and recording the second data area to be compressed corresponding to the data and the position of the reserved compression area in which the compressed data corresponding to the data is stored through a table entry; and sequentially compressing the data until no data needs to be compressed, and closing the data area to be compressed which does not store the data.
8. The system for reducing power consumption of dynamic random access memory according to claim 5, further comprising a decompression module for sequentially decompressing the compressed data according to a reverse order of a data compression order and storing the decompressed data into an original data region to be compressed based on the table entry.
9. A computer-readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the method of reducing power consumption of a dynamic random access memory according to any one of claims 1 to 4.
10. An apparatus for reducing power consumption of a dynamic random access memory, comprising: a processor and a memory;
the memory is used for storing a computer program; the memory comprises a control and compression program area, an item area, a reserved compression area and a data area to be compressed;
the processor is connected to the memory and is configured to execute the computer program stored in the memory to cause the dynamic random access memory power consumption reduction device to perform the method for reducing the power consumption of the dynamic random access memory according to any one of claims 1 to 4.
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Citations (4)
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| CN101086680A (en) * | 2006-06-08 | 2007-12-12 | 英特尔公司 | Increasing the battery life of a mobile computing system in reduced power state through memory compression |
| CN107077189A (en) * | 2014-11-20 | 2017-08-18 | 高通股份有限公司 | System and method for reducing the volatile memory standby power in portable computing device |
| CN108536271A (en) * | 2018-03-30 | 2018-09-14 | 青岛海信电器股份有限公司 | A kind of method, apparatus and storage medium reducing power consumption |
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