CN102929383A - Method for reducing embedded system power consumption through central processing unit (CPU) dynamic frequency modulation technology - Google Patents
Method for reducing embedded system power consumption through central processing unit (CPU) dynamic frequency modulation technology Download PDFInfo
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- CN102929383A CN102929383A CN2012104372786A CN201210437278A CN102929383A CN 102929383 A CN102929383 A CN 102929383A CN 2012104372786 A CN2012104372786 A CN 2012104372786A CN 201210437278 A CN201210437278 A CN 201210437278A CN 102929383 A CN102929383 A CN 102929383A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a method for reducing embedded system power consumption through a central processing unit (CPU) dynamic frequency modulation technology and belongs to the technical field of electronic information. The method includes acquiring CPU occupation ratio of each thread and running frequency of a present CPU, detecting whether touch screen TOUCH incidents exist or not, calculating the CPU frequency which requires dynamic adjustment and the CPU occupation ratio of each thread according to the existence of the touch screen TOUCH incidents, and setting corresponding CPU frequency values according to the CPU frequency and the CPU occupation ratio of each thread. According to the method for reducing the embedded system power consumption through the CPU dynamic frequency modulation technology, whether the touch screen TOUCH incidents exist or not is detected on the embedded system which is limited in resource, an application layer and a driving layer of the embedded system are combined to dynamically adjust the running frequency of the CPU, the CPU frequency value can be adjusted under different circumstances, the user experience is improved, the embedded system power consumption is reduced, and the energy conservation of the CPU is achieved.
Description
Technical field
The present invention relates to a kind of method that reduces power consumption of embedded system by the CPU dynamic frequency modulation technology, belong to electronic information technical field.
Background technology
China's fast economic growth, every construction obtains great achievement, but has also paid the destroyed cost of huge resources and environment, and the contradiction between the two is increasingly sharp-pointed, masses' environmental pollution problem strong reaction.This situation and irrationality of the economic structure, extensive pattern of economic growth are directly related.Do not accelerate to adjust economic structure, change growth pattern, resource fork is unable to hold out, and environment can hold any more, and society holds and dares not accept, and economic development is hard to carry on.Only adhere to saving development, cleaning development, security developments, could realize sound and rapid economic growth.Simultaneously, greenhouse gas emission causes global warming, enjoys international community's extensive concern.Further strengthen energy-saving and emission-reduction work, also be the reply Global climate change in the urgent need to.
Embedded system is a kind of " embedding controlled device inside fully, the dedicated computer system that designs for application-specific ", and it carries out predefined task with particular requirement by limited hardware resource.Because embedded system is only for a special task, the designer can be optimized it, reduces size and reduces cost.
With the embedded system of touch-screen, touch screen reaction velocity and have a strong impact on the user with the user interactions degree and experience degree when the user operates touch screen.The good embedded system with touch-screen can be followed user's operation in time, delicately user's operation is provided reaction.The embedded system with touch-screen that exists now, when the user operates touch-screen, the situation that system can not closely follow user's gesture operation appears in meeting more or less, serious meeting causes system the situations such as stuck, slack-off to occur, and the existence of these situations is having a strong impact on the user to the experience of system.
The protection point of this patent is on the embedded system of resource-constrained; by detecting whether touch-screen TOUCH event is arranged; dynamically adjusted the running frequency of CPU by the application layer of embedded system and the combination that drives layer, raising user experience, and then reduced the power consumption of embedded system.Denomination of invention is that " method and apparatus that a kind of CPU of realization is energy-conservation ", the patent No. are that the artificial ancient loyal patent magnificent, Li Li of CN102004543A, invention discloses the energy-conservation method of a kind of CPU of realization, the method has just proposed a kind of cpu frequency control method of the application of cpu resource being redistributed cpu resource by program, does not relate to the problem of coming alternately elevator system performance, raising user to experience with user's touch operation.
Summary of the invention
For defective and the deficiency that overcomes prior art, the invention provides a kind of method that reduces power consumption of embedded system by the CPU dynamic frequency modulation technology, can under different sights, regulate the cpu frequency value, energy-conservation to realize CPU's.
Technical scheme of the present invention realizes in the following way.
A kind of method that reduces power consumption of embedded system by the CPU dynamic frequency modulation technology, be combined to realize with the system drive layer by system bottom software, the bottom software host process comprises four from the frequency of thread: cpufrequencer-monitoring cpu and the cpu frequency use condition of each thread, cpucalculator-calculating needs the cpu frequency values of adjustment and the cpu frequency apportioning cost of each thread, the frequency values that cpucontroller-calculates by cpucalculator is that cpu arranges corresponding frequencies and for each thread arranges the corresponding frequencies value, whether the cpulistener-monitoring has the touch-screen action; Cpufrequencer inside comprises a timer timer1, and whether the every 100ms monitoring of timer1 once has the touch-screen action; Cpulistener inside comprises a timer timer2, and whether the every 100ms monitoring of timer2 once has the touch-screen action; The method step is as follows:
1) cpufrequencer monitors cpu operating position and the cpu currency of each thread;
2) in view of the embedded system resource-constrained, experience for improving the user, if the touch-screen action is arranged, namely be set to full frequency running by cpucontroller cpu frequency values, monitor the ruuning situation of other thread by cpufrequencer;
3) in the situation that other thread work is constant, main thread keeps original running thread cpu frequency values constant, will be full frequently running with the thread set of frequency of touch screen interaction by cpucontroller;
4) if other thread work has change, monitor the cpu frequency values of each thread request by cpufrequencer, in the normal situation of thread frequency apportioning cost of preferential assurance and touch screen interaction, be the frequency values that all the other threads distribute respective request;
5) if any frequency residue, main thread is all distributed to thread with touch screen interaction with residual frequency;
6) utilize fully such as frequency, main thread does not carry out subsequent operation;
7) such as frequency values overfrequency value, calculate each thread request cpu frequency values of residue by cpucalculator, the thread priority that provides according to cpulister preferentially guarantees the thread priority task that priority is high, if priority is identical, then do not distribute to each thread according to there being before the touch screen operation ratio to the cpu frequency use amount will remain the cpu frequency value.
Whether the present invention according to having touch-screen TOUCH event to determine the CPU occupation rate of each thread and the frequency values of CPU, and then dynamically adjust, thereby reduce power consumption of embedded system.
The protection point of this patent is on the embedded system of resource-constrained; by detecting whether touch-screen TOUCH event is arranged; the running frequency of CPU is dynamically adjusted in application layer by embedded system and the combination that drives layer, raising user experience, and then reduced the power consumption of embedded system.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment:
A kind of method that reduces power consumption of embedded system by the CPU dynamic frequency modulation technology, be combined to realize with the system drive layer by system bottom software, the bottom software host process comprises four from the frequency of thread: cpufrequencer-monitoring cpu and the cpu frequency use condition of each thread, cpucalculator-calculating needs the cpu frequency values of adjustment and the cpu frequency apportioning cost of each thread, the frequency values that cpucontroller-calculates by cpucalculator is that cpu arranges corresponding frequencies and for each thread arranges the corresponding frequencies value, whether the cpulistener-monitoring has the touch-screen action; Cpufrequencer inside comprises a timer timer1, and whether the every 100ms monitoring of timer1 once has the touch-screen action; Cpulistener inside comprises a timer timer2, and whether the every 100ms monitoring of timer2 once has the touch-screen action; The method step is as follows:
1) cpufrequencer monitors cpu operating position and the cpu currency of each thread;
2) in view of the embedded system resource-constrained, experience for improving the user, if the touch-screen action is arranged, namely be set to full frequency running by cpucontroller cpu frequency values, monitor the ruuning situation of other thread by cpufrequencer;
3) in the situation that other thread work is constant, main thread keeps original running thread cpu frequency values constant, will be full frequently running with the thread set of frequency of touch screen interaction by cpucontroller;
4) if other thread work has change, monitor the cpu frequency values of each thread request by cpufrequencer, in the normal situation of thread frequency apportioning cost of preferential assurance and touch screen interaction, be the frequency values that all the other threads distribute respective request;
5) if any frequency residue, main thread is all distributed to thread with touch screen interaction with residual frequency;
6) utilize fully such as frequency, main thread does not carry out subsequent operation;
7) such as frequency values overfrequency value, calculate each thread request cpu frequency values of residue by cpucalculator, the thread priority that provides according to cpulister preferentially guarantees the thread priority task that priority is high, if priority is identical, then do not distribute to each thread according to there being before the touch screen operation ratio to the cpu frequency use amount will remain the cpu frequency value.
Claims (1)
1. one kind is passed through the method that the CPU dynamic frequency modulation technology reduces power consumption of embedded system, be combined to realize with the system drive layer by system bottom software, the bottom software host process comprises five from the frequency of thread: cpufrequencer-monitoring cpu and the cpu frequency use condition of each thread, cpucalculator-calculating needs the cpu frequency values of adjustment and the cpu frequency apportioning cost of each thread, the frequency values that cpucontroller-calculates by cpucalculator is that cpu arranges corresponding frequencies and for each thread arranges the corresponding frequencies value, whether the cpulistener-monitoring has the touch-screen action; Cpulister monitors each thread working order, determines thread priority by internal system mechanism; Cpufrequencer inside comprises a timer timer1, and whether the every 100ms monitoring of timer1 once has the touch-screen action; Cpulistener inside comprises a timer timer2, and whether the every 100ms monitoring of timer2 once has the touch-screen action; The method step is as follows:
1) cpufrequencer monitors cpu operating position and the cpu currency of each thread;
2) in view of the embedded system resource-constrained, experience for improving the user, if the touch-screen action is arranged, namely be set to full frequency running by cpucontroller cpu frequency values, monitor the ruuning situation of other thread by cpufrequencer;
3) in the situation that other thread work is constant, main thread keeps original running thread cpu frequency values constant, will be full frequently running with the thread set of frequency of touch screen interaction by cpucontroller;
4) if other thread work has change, monitor the cpu frequency values of each thread request by cpufrequencer, in the normal situation of thread frequency apportioning cost of preferential assurance and touch screen interaction, be the frequency values that all the other threads distribute respective request;
5) if any frequency residue, main thread is all distributed to thread with touch screen interaction with residual frequency;
6) utilize fully such as frequency, main thread does not carry out subsequent operation;
7) such as frequency values overfrequency value, calculate each thread request cpu frequency values of residue by cpucalculator, the thread priority that provides according to cpulister preferentially guarantees the thread priority task that priority is high, if priority is identical, then do not distribute to each thread according to there being before the touch screen operation ratio to the cpu frequency use amount will remain the cpu frequency value.
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| CN2012104372786A CN102929383A (en) | 2012-11-06 | 2012-11-06 | Method for reducing embedded system power consumption through central processing unit (CPU) dynamic frequency modulation technology |
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| CN2012104372786A CN102929383A (en) | 2012-11-06 | 2012-11-06 | Method for reducing embedded system power consumption through central processing unit (CPU) dynamic frequency modulation technology |
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| CN103475790A (en) * | 2013-09-06 | 2013-12-25 | 中国科学院计算技术研究所 | Intelligent mobile terminal power consumption management method |
| CN104423533A (en) * | 2013-09-09 | 2015-03-18 | 联想(北京)有限公司 | Processor frequency control method and electronic equipment |
| CN104768208A (en) * | 2015-03-17 | 2015-07-08 | 广东欧珀移动通信有限公司 | Frequency modulation mode switching method and mobile terminal |
| WO2017206860A1 (en) * | 2016-05-31 | 2017-12-07 | 广东欧珀移动通信有限公司 | Processing method of mobile terminal and mobile terminal |
| CN109298774A (en) * | 2018-09-30 | 2019-02-01 | 联想(北京)有限公司 | A kind of method of adjustment and device |
| CN109960584A (en) * | 2019-01-30 | 2019-07-02 | 努比亚技术有限公司 | CPU frequency modulation control method, terminal and computer readable storage medium |
| US11573836B2 (en) | 2020-05-28 | 2023-02-07 | Apollo Intelligent Connectivity (Beijing) Technology Co., Ltd. | Resource scheduling method and apparatus, and storage medium |
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Application publication date: 20130213 |