CN101477398A - Terminal power consumption control method and apparatus - Google Patents
Terminal power consumption control method and apparatus Download PDFInfo
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- CN101477398A CN101477398A CNA2008101865412A CN200810186541A CN101477398A CN 101477398 A CN101477398 A CN 101477398A CN A2008101865412 A CNA2008101865412 A CN A2008101865412A CN 200810186541 A CN200810186541 A CN 200810186541A CN 101477398 A CN101477398 A CN 101477398A
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Abstract
The embodiment discloses a method and a device for terminal power consumption control. The terminal power consumption control method comprises processing unit loads and a bus load of a terminal are obtained; and the operating frequencies of the processing unit loads and the bus load are set according to the processing unit loads and the bus load. In the technical scheme, the terminal comprehensively determines a payload of the whole system according to the processing unit loads (including CPU, DSP and the like) and the bus loading, further adjusts the frequencies of the processing units and the bus to enable the terminal processing units and the bus to run at the frequencies matched with the application services executed currently, and therefore, on the basis of the normal running of the services, the optimal control of the terminal power consumption is realized and the overall power consumption of the terminal is reduced.
Description
Technical field
The present invention relates to technical field of mobile terminals, particularly relate to a kind of terminal power consumption control method and device.
Background technology
In the last few years, mobile phone, PDA built-in terminals such as (personal digital assistants) incorporated in the daily life.Along with the function of terminal is become stronger day by day, the power consumption demand of terminal is also more and more higher; On the other hand, the user makes the energy supply of terminal be restricted again to the portable demand of terminal.The target of embedded device low power dissipation design is satisfying under the prerequisite of user to performance requirement exactly, reduces the power consumption of equipment as far as possible, to solve the contradiction between the high-performance and the limited energy content of battery.
DPM (Dynamic Power Manager, dynamic power management) is a kind of method that can effectively reduce equipment power dissipation, wherein a kind of mode of DPM is DVFS (Dynamic Voltage and FrequencyScaling, the dynamic electric voltage frequency is adjusted), promptly adjust running frequency and voltage according to current system loading state, when system loading is low, can adopt lower running frequency and voltage, to reach the purpose of saving power consumption.
Wherein, the specific implementation method of dynamic frequency adjustment is, pre-defined some kinds of Profile (configuration information), CPU (Central Processing Unit, CPU (central processing unit)) frequency and bus frequency that each Profile is corresponding different respectively, for example, it is 240/120 that the institute of certain Profile comprises information, after then being illustrated in this Profile of selection, CPU will operate in 240MHz, and bus operates in 120MHz.
In the prior art, be to judge system loading according to the load of CPU, and further select corresponding Profile according to the load of CPU, Figure 1 shows that a kind of synoptic diagram of selecting Profile according to cpu load: concrete implication is as follows:
When cpu load during at 0-30%, the Profile A of corresponding selection is 60/15, (be that the CPU frequency of operation is that 60Mhz, bus frequency of operation are 40MHz, the back is described similar);
When cpu load during at 30%-50%, the Profile B of corresponding selection is 120/40;
When cpu load during at 50%-70%, the Profile C of corresponding selection is 180/60;
When cpu load during at 70%-100%, the Profile D of corresponding selection is 266/133.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
In the such scheme, according to the load of CPU the frequency of operation of CPU is set, and the frequency of operation of bus is along with equidirectional rising of CPU frequency of operation or reduction.And the concrete business that terminal will be carried out not is on all four to the requirement of CPU and bus, for example, for the computation-intensive business, requires higher CPU frequency of operation, and is less demanding to bus frequency; And intensive professional for control, then require higher bus frequency, and do not need CPU to carry out too many computing.As seen, only according to the load of CPU, can not reflect the state of total system objectively, therefore select Profile according to the load of CPU, its corresponding bus frequency may be inconsistent with the applied business demand, if selected Profile bus frequency is higher, can cause unnecessary power consumption to increase.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of terminal power consumption control method and device, realizes the optimal control of power consumption, reduces the overall power of terminal, and technical scheme is as follows:
A kind of terminal power consumption control method comprises:
Obtain the processing unit load and the bus load of terminal;
According to processing unit load and bus load, the processing unit frequency of operation and the bus frequency of operation of terminal is set.
A kind of power consumption of terminal control device comprises:
The load acquiring unit is used to obtain the processing unit load and the bus load of terminal;
The frequency configuration unit is used for the processing unit load and the bus load that obtain according to described load acquiring unit, and the frequency of operation and the bus frequency of operation of the processing unit of terminal is set.
With only comparing with the frequency of bus of prior art according to cpu load adjustment CPU, in the above technical scheme, the service load that terminal is comprehensively determined total system according to the load and the bus load of processing unit (comprising CPU, DSP etc.), the frequency of whole processing unit of the step of going forward side by side and bus, make the processing unit of terminal and bus can both operate on the applied business matched frequency with current execution, on the basis that guarantees professional normal operation, realize the optimal control of power consumption of terminal, reduced the overall power of terminal.
Description of drawings
Fig. 1 is a synoptic diagram of selecting Profile in the prior art according to cpu load;
Fig. 2 is for realizing the process flow diagram of the inventive method specific embodiment one;
Fig. 3 is the load interval division synoptic diagram of the inventive method specific embodiment two;
Fig. 4 is the another kind of synoptic diagram of the load interval division of the inventive method specific embodiment two;
Fig. 5 is the structural representation of the power consumption of terminal control device of the embodiment of the invention three;
Fig. 6 is the another kind of structural representation of the power consumption of terminal control device of the embodiment of the invention three.
Embodiment
At first the terminal power consumption control method to the embodiment of the invention describes, and comprising:
Obtain the load and the bus load of the processing unit of terminal;
According to processing unit load and bus load, the processing unit frequency of operation and the bus frequency of operation of terminal is set.
The embodiment of the invention is taken all factors into consideration current processing unit load and bus load, and according to the situation of processing unit and bus load, optimum processing unit frequency of operation and bus frequency of operation is set, to realize the optimal control of power consumption.Wherein, above-mentioned processing unit can comprise the processing unit of central processing unit CPU, digital signal processor DSP or other types.In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment one:
Figure 2 shows that the process flow diagram of embodiment of the invention terminal power consumption control method, may further comprise the steps:
S101 obtains the load and the bus load of processing unit;
In the present embodiment, be that example describes with CPU with processing unit.In general, cpu load and bus load all show with the number percent form.That obtains cpu load can adopt following method with bus load:
Obtain the method for cpu load:
Set the task A of a low priority, statistics is in unit interval T2, and system enters the time T of task A
Idle, then
By calculating L
CpuThe statistical value of a period of time, just can access current cpu load.
The carrying method of bus is to add up in unit interval T1 the time T that the read-write operation that bus is initiated is occupied
Load, then,
By calculating L
BusThe statistical value of a period of time, just can access current bus load.
Need to prove, in each step of embodiment, be to be that example describes with CPU, and in fact, described processing unit can comprise the processor of CPU, DSP or other types; If what terminal adopted is the framework of multibus, then the bus load that is obtained also can be the weighted mean value of several bus loads, or the load of a certain specific bus (weight that can be understood as other buses is 0).In addition, those skilled in the art can also adopt other modes to obtain CPU and bus load, and the embodiment of the invention is not limited this.
S102 according to cpu load, is provided with the CPU frequency of operation;
The constant interval of cpu load is understandable that at 0-100%, and set CPU frequency of operation should be with the equidirectional variation of cpu load.For example, when CPU is in high load condition, illustrate that the current handled applied business of terminal needs CPU to carry out a large amount of computings, should be set to the highest frequency of operation to guarantee the treatment effeciency of current application business by CPU this moment; And when CPU is in low load condition, illustrate that the current handled applied business of terminal is less demanding to CPU, this moment, CPU only can guarantee the normal execution of applied business with lower frequency of operation, simultaneously, reduced the overall power consumption that cpu frequency also can directly reduce terminal.
Specifically, we can be divided into the experimental process interval with the constant interval 0-100% of cpu load, and define the frequency of operation value of a CPU for each sub-range.The maximum operation frequency of supposing CPU is 200Mhz, and we can define so:
When cpu load during at 0-30%, the frequency of operation that CPU is set is 100Mhz;
When cpu load during at 30%-60%, the frequency of operation that CPU is set is 166Mhz;
When cpu load during at 60%-100%, the frequency of operation that CPU is set is 200Mhz.
As seen, in the such scheme, the constant interval of cpu load 3 sub-ranges specifically have been divided into, wherein 30% and 60% is interval critical point, according to the cpu load that is obtained among the S101, judge the residing interval of this load value, further just can select and this interval corresponding work frequency values.
S103 according to bus load, is provided with the frequency of operation of bus.
The concrete business that terminal will be carried out not is on all four to the requirement of CPU and bus, for example, for the computation-intensive business, requires higher CPU frequency of operation, and is less demanding to bus frequency; And intensive professional for control, then require higher bus frequency, but do not need CPU to carry out too many computing.For the bus that guarantees terminal also can operate in suitable frequency, in embodiments of the present invention,, be provided with outside the CPU frequency of operation except according to cpu load, further also to the frequency of operation of bus be set according to bus load.
With similar described in the S102, we can be divided into the experimental process interval with the constant interval 0-100% of bus load, and define the frequency of operation value of a bus for each sub-range.Specifically, cpu frequency and bus frequency can operate under one or more specific ratio relations, and we claim that this ratio is the frequency dividing ratio (for convenience of description, hereinafter to be referred as frequency dividing ratio) of CPU and bus.For example carve at a time, the frequency of operation of CPU is 200Mhz, and the frequency of operation of bus is 100Mhz, and then the frequency dividing ratio of Ci Shi CPU and bus is 1:2.Frequency division can be realized with divider on hardware, general in the circuit design of terminal, the capital comprises that multiple frequency divider is to realize different frequency dividing ratio settings, therefore, under the prerequisite of determining the CPU frequency of operation, we can recently realize setting to the bus frequency of operation by changing frequency division.
For example, terminal is supported 1:2,1:3 and three kinds of frequency divisions of 1:4, and like this, we just can be divided into the experimental process interval with the constant interval 0-100% of bus load, and is frequency dividing ratio of each sub-range definition:
When bus load during at 0-30%, it is 1:4 that frequency dividing ratio is set;
When bus load during at 30%-60%, it is 1:3 that frequency dividing ratio is set;
When bus load during at 60%-100%, it is 1:2 that frequency dividing ratio is set.
The frequency of operation of supposing current C PU is 200Mhz, then in above-mentioned three interval ranges, according to corresponding frequency dividing ratio setting, just can respectively bus frequency be arranged on 50Mhz, 66Mhz and the 100Mhz.
Above-mentioned step S101-S103, can be periodically to carry out, to guarantee that terminal can be according to current applied business operation conditions, dynamically arrange the running frequency of CPU and bus, make CPU and bus can both operate on the applied business matched frequency with current execution, on the basis that guarantees professional normal operation, realized the optimal control of power consumption of terminal, reduced the overall power of terminal.
Embodiment two:
In actual applications, we can pre-defined a series of Profile (configuration information), all comprises a kind of concrete cpu frequency value setting value and frequency dividing ratio setting value among each Profile, and the sub-range of a corresponding cpu load and bus load.When the cpu load of terminal and bus load are changed to certain sub-range,, just can directly CPU frequency of operation and the setting of bus frequency of operation be finished by loading the corresponding Profile in this sub-range.
Referring to shown in Figure 3, the horizontal ordinate of Fig. 3 is represented the load variations of CPU, is divided into 3 sub-ranges: [0, a1], [a1, a2], [a2,100%], and we determine a kind of cpu frequency setting value for each sub-range;
The ordinate of Fig. 3 is represented the load variations of bus, is divided into 3 sub-ranges: [0, b1], [b1, b2], [b2,100%], and we determine a kind of setting value of frequency dividing ratio for each sub-range;
Like this, by permutation and combination, we can access 3 * 3=9 sub-range altogether, and then can determine 9 kinds of Profile, i.e. Profile A-Profile I shown in the figure.When the cpu load of terminal and bus load are changed to certain sub-range, only need to load corresponding Profile, according to the setting value that is comprised among this Profile, just can finish setting to CPU frequency of operation and bus frequency of operation.For example:
When cpu load is [0, a1], when bus load is [0, b1], load Profile A;
When cpu load is [a1, a2], when bus load is [b1, b2], load Profile E;
When cpu load is [a2,100%], when bus load is [0, b1], load Profile I;
......
In the such scheme, can adopt following running parameter setting:
A1＝30％，a2＝60％，b1＝10％，b2＝20％；
Profile A:60,1/4 (expression cpu frequency setting value is 60Mhz, and the frequency dividing ratio setting value is 1/4, below describes similar);
Profile?B：60，1/3；
Profile?C：60，1/2；
Profile?D：120，1/4；
Profile?E：120，1/3；
Profile?F：120，1/2；
Profile?G：240，1/4；
Profile?H：240，1/3；
Profile?I：240，1/2；
According to above parameter, we just can obtain the plan of establishment as shown in Figure 4.As seen from Figure 4, in the horizontal ordinate direction, along with the variation of current C PU load, CPU can operate under the different frequencies; In the ordinate direction, bus frequency also can change along with the variation of current bus load equally.According to the demand of current business to CPU and bus, dynamically adjust the running frequency of CPU and bus, on the basis that guarantees professional normal operation, realized the optimal control of power consumption of terminal, reduced the overall power of terminal.
Need to prove, originally buy Shi Lizhong, the division methods between load region and the setting value of each parameter are only for schematically illustrating, and those skilled in the art can be according to the actual requirements, adopt division methods and each pre-set parameter between other load region, the embodiment of the invention is not limited this.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Embodiment three:
Corresponding to top method embodiment, the embodiment of the invention also provides a kind of power consumption of terminal control device, referring to shown in Figure 5, comprising:
Referring to shown in Figure 5, described frequency configuration unit 520 can comprise:
Cpu frequency is provided with subelement 521, is used for according to cpu load, and the CPU frequency of operation is set;
Bus frequency is provided with subelement 522, is used for according to bus load, and the frequency of operation of bus is set.Specifically, it can be that frequency dividing ratio is provided with the unit that this bus frequency is provided with subelement, is used for according to described cpu frequency the CPU frequency of operation that subelement is provided with being set, and by changing the frequency dividing ratio of CPU and bus, the frequency of operation of bus is set.
Described frequency configuration unit 520, it also can be the configuration information loading unit, be used for loading and, using the setting value that comprises among the described Profile, set handling cell operation frequency and bus frequency of operation as pretreatment unit load and the pairing configuration information Profile of bus load;
Wherein, described configuration information Profile comprises according to application demand, and is predetermined at different processing unit loads and the configuration information Profile under the bus load state, comprises the frequency setting value of processing unit and bus among the described Profile.
If in above-mentioned processing unit, comprise CPU, then determine the method for the configuration information Profile under different cpu loads and bus load state, specifically can comprise:
The constant interval 0-100% of cpu load is divided into A sub-range, a kind of cpu frequency setting value is determined in each sub-range;
The constant interval 0-100% of bus load is divided into B sub-range, each sub-range is determined a kind of setting value (or frequency dividing ratio setting value of CPU and bus) of bus;
The frequency dividing ratio setting value of A kind cpu frequency setting value and B kind CPU and bus is carried out permutation and combination, determine A * B kind configuration information Profile.
The embodiment of the invention also provides a kind of terminal device, and this terminal device comprises the device described in the foregoing description three.
For device embodiment, because it is substantially corresponding to method embodiment, so describe fairly simplely, relevant part gets final product referring to the part explanation of method embodiment.Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills promptly can understand and implement under the situation of not paying performing creative labour.
Need to prove, be example only among this instructions embodiment with CPU and bus, what those skilled in the art were easy to expect is, described processing unit, the processor that can comprise CPU, DSP or other types, described load of obtaining bus also can be under the structure of multibus or multiple subsystem, obtains the weighted mean value of a certain specific bus or several bus loads.Accordingly, the setting of frequency of operation also is not limited only to CPU and bus.For example, can also comprise the DSP frequency of operation, perhaps frequency of operation value of each bar bus etc. in the multiple bus system.According to the actual requirements, can in Profile, also can comprise more multi-class frequency configuration information to doing the more meticulous division of granularity between each load region.
The above only is the specific embodiment of the present invention, does not constitute the qualification to protection domain of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, a kind of terminal power consumption control method is characterized in that, comprising:
Obtain the processing unit load and the bus load of terminal;
According to processing unit load and bus load, the processing unit frequency of operation and the bus frequency of operation of terminal is set.
2, method according to claim 1 is characterized in that, described processing unit comprises central processing unit CPU and/or digital signal processor DSP.
3, method according to claim 1 is characterized in that, described terminal is the terminal of multibus framework, and the then described bus load that obtains terminal comprises:
Obtain the weighted mean value of each bar bus load.
4, according to each described method of claim 1 to 3, it is characterized in that described processing unit comprises CPU, then described according to processing unit load and bus load, the processing unit frequency of operation and the bus frequency of operation of terminal are set, comprising:
According to the processing unit load, the processing unit frequency of operation of terminal is set;
According to the CPU frequency of operation that has been provided with,, the frequency of operation of bus is set by changing the frequency dividing ratio of CPU and bus.
5, according to each described method of claim 1 to 3, it is characterized in that, according to application demand, pre-determine at different processing unit loads and the configuration information Profile under the bus load state, comprise the frequency setting value of processing unit and bus among the described Profile;
Then described processing unit frequency of operation and the bus frequency of operation that terminal is set comprises:
Load with as pretreatment unit load and the pairing Profile of bus load, use the setting value that comprises among the described Profile, the processing unit frequency of operation and the bus frequency of operation of terminal is set.
6, method according to claim 5 is characterized in that, describedly determines to comprise at different processing unit loads and the configuration information Profile under the bus load state:
The constant interval 0-100% of processing unit load is divided into A sub-range, a kind of processing unit frequency setting value is determined in each sub-range;
The constant interval 0-100% of bus load is divided into B sub-range, each sub-range is determined a kind of setting value of bus;
A kind processing unit frequency setting value and B kind bus frequency setting value are carried out permutation and combination, determine A * B kind configuration information Profile.
7, method according to claim 6 is characterized in that, described processing unit comprises CPU, then described each sub-range is determined to comprise a kind of setting value of bus:
Each sub-range is determined the frequency dividing ratio setting value of a kind of CPU and bus.
8, a kind of power consumption of terminal control device is characterized in that, comprising:
The load acquiring unit is used to obtain the processing unit load and the bus load of terminal;
The frequency configuration unit is used for the processing unit load and the bus load that obtain according to described load acquiring unit, and the frequency of operation and the bus frequency of operation of the processing unit of terminal is set.
9, device according to claim 8 is characterized in that, described processing unit comprises central processing unit CPU, and then described frequency configuration unit comprises:
Cpu frequency is provided with subelement, is used for according to cpu load, and the CPU frequency of operation of terminal is set;
Bus frequency is provided with subelement, is used for according to bus load, and the frequency of operation of the bus of terminal is set.
10, device according to claim 9 is characterized in that,
It is that frequency dividing ratio is provided with the unit that described bus frequency is provided with subelement, is used for according to described cpu frequency the CPU frequency of operation that subelement is provided with being set, and by changing the frequency dividing ratio of CPU and bus, the frequency of operation of the bus of terminal is set.
11, device according to claim 8, it is characterized in that, described frequency configuration unit is the configuration information loading unit, be used for loading and working as pretreatment unit load and the pairing configuration information Profile of bus load, use the setting value that comprises among the described Profile, the processing unit frequency of operation and the bus frequency of operation of terminal is set;
Wherein, described configuration information Profile comprises according to application demand, and is predetermined at different processing unit loads and the Profile under the bus load state, comprises the frequency setting value of processing unit and bus among the described Profile.
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| CN107844187A (en) * | 2016-09-21 | 2018-03-27 | 龙芯中科技术有限公司 | Power consumption management method, device and electronic equipment |
| CN107844187B (en) * | 2016-09-21 | 2020-06-12 | 龙芯中科技术有限公司 | Power consumption management method and device and electronic equipment |
| CN108983942A (en) * | 2017-05-31 | 2018-12-11 | 深圳市中兴微电子技术有限公司 | A kind of method and device of dynamic frequency |
| CN110399034A (en) * | 2019-07-04 | 2019-11-01 | 福州瑞芯微电子股份有限公司 | A kind of power consumption optimization method and terminal of SoC system |
| CN110399034B (en) * | 2019-07-04 | 2021-08-17 | 福州瑞芯微电子股份有限公司 | Power consumption optimization method of SoC system and terminal |
| CN112667478A (en) * | 2020-12-30 | 2021-04-16 | 联想(北京)有限公司 | Control method and control device |
| CN114779918A (en) * | 2022-05-06 | 2022-07-22 | 东莞市步步高教育软件有限公司 | Dynamic frequency modulation power saving method, system, terminal equipment and storage medium |
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