CN1752896A - Power source management method of embedded equipment under operation system cooperation and its system - Google Patents
Power source management method of embedded equipment under operation system cooperation and its system Download PDFInfo
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Abstract
The present invention provides a method for making dynamic power supply management of equipment in embedded operation system and its dynamic power supply management system. Said system includes a system-level power supply management module and several equipment-level power supply management modules connected with said system-level power supply management module, every power supply management module includes monitoring submodule, decision submodule and control submodule.
Description
Technical field
The invention belongs to field of computer technology, relate to a kind of method and system of in embedded OS, equipment being carried out dynamic power management.
Background technology
Equipment dynamic power supply management method in the embedded system that oneself has, be in hardware device or device driver, to realize, the accessed information of concern equipment, feature according to free time of device access in for some time, the free time length of secondary device under the prediction places equipment the state of low-power consumption when greater than a certain threshold value after once visit finishes.The event establishment mathematical model that existent method will be considered as the visit of equipment is at random added up, ignored application program as device access active request person's characteristics and operating system management control action to the various resources of total system, when the operation of application program or access module change, be easy to cause prediction error.
Summary of the invention
The present invention overcomes the deficiency of device power supply (DPS) management method in the existing embedded system, under the operating system cooperation, relates to the device power supply (DPS) management method of application program, task scheduling and each level of driver embedded software, makes that prediction is more accurate.
Technology contents of the present invention: a kind of method of equipment being carried out dynamic power management in embedded OS comprises: a kind of method of equipment being carried out dynamic power management in embedded OS comprises:
Collection and surveillance and device power supply (DPS) management related information when system moves comprise: obtain the information of system and task, cpu busy percentage information, task access means and the power state information of system and equipment;
By system-level and device level power management module, according to the power management message that obtains in information gathering and the monitor module, response and Processing tasks management and scheduling events, timer incident, peripheral hardware wake events, power supply emergency are then made a strategic decision according to certain rule;
According to the result of power management decision-making, specific implementation can shield the characteristic of bottom different hardware to the state exchange of system, sheet inner part, peripherals, and provides unified power-management interface to the upper strata.
The specific implementation step of collection and surveillance and device power supply (DPS) management related information comprises:
During system initialization, participate in the equipment calls registration function of power management, manage device registration power management data structure, and articulate the control interface of each equipment to system level power;
In task management and scheduling, insert monitor module, catch task establishment, cancel, the task of the last operation of cpu busy percentage, CPU in a period of time recently is total and the information of visiting the priority of this equipment;
In device driver, at the forward and backward insertion monitor module of device access operation, the mission bit stream that obtains each device access start and end time, institute's access means and send request of access is as the historical information record of device access.
The concrete implementation step that the system level power administration module is made a strategic decision comprises:
CPU, SRAM controlling sub by the system level power administration module, finish when system and reach certain threshold value free time, or input equipment free time is when reaching certain threshold value, checkout facility power management message table, whether check has application program to reserve a certain equipment, if do not have, call control module system is changed to low power consumpting state.
The concrete implementation step that the device level power management module is made a strategic decision comprises:
When task is visited this equipment, just open this equipment, and begin supervision and management this equipment; When the task termination of this equipment of all-access, close this equipment;
When task is visited a plurality of equipment, has dependence as access order, according to the following operating position of this dependence predict device.
In device driver,, the device free time that prediction is following, during greater than a certain threshold value, call control module with device shutdown as free time of predict device next time according to the historical information record of device access.
A kind of system that in embedded OS, equipment is carried out dynamic power management, comprise: a system level power administration module and several device level power management modules that are linked with it, each power management module all comprises: monitor submodule, decision-making submodule and controlling sub
Monitor module obtains the information of system and task, cpu busy percentage information, task access means and the power state information of system and equipment;
Decision-making module is made a strategic decision according to the information that monitor module obtained, and is responsible for the wake events and the power supply emergency of processing and response task management and scheduling events, timed events, external unit simultaneously;
Control module according to the result of decision that decision-making module is made, is utilized driver or hardware abstraction layer, respectively total system, sheet inner part and peripherals is controlled the conversion of completion status.
The system level power administration module also further comprises: the power events processing sub, when power events took place, this submodule called corresponding apparatus and device level submodule.The power management applications interface is used for the constraint that application program provides power management, the decision-making of the power management of Attended Operation system, and the power supply status of inquiry system and equipment provides support but regulate self behavior for the application program self-adaptation of perception power supply.
Decision-making submodule in the device level power management module can also be with the situation of change reporting system level power supply administration module of device power supply (DPS) state, for the system level power management decision provides foundation.
Technique effect of the present invention: task is clocklike to the access module of equipment in the system, and the prediction to device access of introducing the monitor message to system and task and being is more accurate; When the access module generation flip-flop of equipment, the dynamic adjustment of proportion of true free time makes predicted value rapidly near actual value.Under the support of embedded OS electric power management mechanism, to the decision-making of device power supply (DPS) management accurate and effective more.
Description of drawings
Below in conjunction with accompanying drawing, the present invention is made detailed description.
Fig. 1 is an embedded OS power management basic model synoptic diagram:
Fig. 2 is system-equipment two-stage power management module synoptic diagram;
Fig. 3 is each intermodular data, control flow graph;
Fig. 4 is an embedded device method for managing power supply synoptic diagram;
Fig. 5 reaches and existing power supply management method energy consumption comparison diagram for adding the power management front and back;
Fig. 6 is the synoptic diagram of system's operation task number to the influence of power management validity.
Embodiment
With reference to figure 1, the embedded OS power management basic model of native system foundation is divided into supervision, control, three modules of decision-making.
Monitor module is responsible for obtaining and collecting the power state information of demand, cpu busy percentage information, device access information and the equipment and the system of application program
Decision-making module is made a strategic decision according to power management algorithm according to the information that monitor module obtained, and is responsible for the wake events and the power supply emergency (battery electric quantity is low) of processing and response task management and scheduling events, timed events, external unit simultaneously
Control module according to the result of decision that decision-making module is made, is utilized driver or hardware abstraction layer, respectively total system, sheet inner part and peripherals is controlled the conversion of completion status.
According to above-mentioned power management basic model, the structure of power-supply management system of the present invention in embedded OS comprises as shown in Figure 2:
1, system level power management, the conversion and control of the power consumption state of the system of the being responsible for overall situation, comprise: the power state transition of total system, processor power supply state exchange, electric weight be the system state control of (when battery electric quantity hangs down) in emergency circumstances, for application program provides interface;
2, device level power management, under the global power state of determining, feature and operating load according to particular device change performance/power consumption state relatively independently, and with status change notification system level power administration module;
3, information gathering and monitor module be responsible for to be collected the relevant information of runtime system and task, comprise task sum, task status, the cpu busy percentage of operation, and the relevant information of equipment;
4, power events respond module is meant when collecting and monitor module monitors the incident that needs to change power supply status and takes place, and causes corresponding system-level or device level power management and makes a strategic decision, and implements power state transition and controls.
Embedded device method for managing power supply of the present invention, implement concrete method for managing power supply as shown in Figure 4:
During system initialization, participate in the equipment calls registration function of power management, manage device registration power management data structure, and articulate the control interface of each equipment to system level power;
In device driver, forward and backward insertion in the device access operation monitors function, forward and backward being write down time this moment, institute's access means and being sent request of access by the device level monitor module of task takes place in each device access, as the historical information record of device access;
When system moved, application program proposed demand to the system level power administration module;
When system moved, the system level power administration module obtained the CPU usage of access means task by the operating system process scheduling module, and current C PU goes up the process sum of operation, the information of process priority, power management relevant information records when moving as system;
The decision-making of device level power management, obtain the device level monitor module, the system that obtains with system level power administrative institute and the information of equipment two aspects, after the primary equipment accessing operation finishes, power management policy according to prior formulation, whether decision-making places the state of low-power consumption with equipment, and invocation facility level control module realizes last control;
System level power management is responsible for response and is handled power management dependent event and interruption, when receiving the low interruption of battery electric quantity, calls the control interface that each equipment articulates, and each equipment is placed the state of low-power consumption.
Realize in embedded OS DeltaOS that according to the following steps the present invention carries out the method for dynamic power management to equipment in embedded OS, wherein DeltaOS operates on the Samsung S3C44b0x flush bonding processor, and this specific embodiment carries out power management at CPU, network interface card, LCD.
(1) collection and surveillance and device power supply (DPS) management related information
When moving, system obtains the power state information of application program to demand, cpu busy percentage information, device access information and system and each equipment of equipment.
Concrete implementation step is as follows:
1, during system initialization, accept the equipment of operating system power management, by equipment management data structure and the interface that system level power management provides, call registration function device power supply (DPS) management information table device registration in internal memory original state, obtain device identifier and articulate the function interface that under the emergency circumstance equipment is placed low power consumpting state.
2, in the operating system process scheduling module, insert user's spread function, the establishment of monitoring process, operation, the moment of hanging up, cancelling, when process switching, insert supervision to idle process, and the process of obtaining is at recently CPU usage information, the process priority of a period of time, the information submodule will be inserted task management information table in the internal memory for information about during the system operation that provides by system level power management.
3, in device driver, the supervision function is being inserted in the front and back of device access, obtain the task identifier of each start time, concluding time, device identifier, access means to device access, by the supervision submodule of device level power management module, above-mentioned information is inserted equipment-task visit information table of safeguarding in the internal memory.When task begins access means, in information table this Task Distribution space; When right task access means, begin supervision and management to this equipment.
4, in the Interrupt Process function of process scheduling and keyboard, insert timer, power events and interruption submodule by the system level power administration module, do not have the mutual duration with keyboard at the continuous execution time of obtaining idle process
5, increase the user interface that application program is reserved equipment, when this interface of application call,, revise the device power supply (DPS) management information table, do not wish the equipment of closing during the identification application operation by the application requirement submodule of system level power administration module
Information and device access historical information are made a strategic decision when (two) moving according to system
By system-level and device level power management decision-making module, according to the power management message that obtains in information gathering and the monitor module, response and Processing tasks management and scheduling events, timer incident, peripheral hardware wake events, power supply emergency then, and make a strategic decision according to the power management policy of prior formulation.
Concrete implementation step is as follows:
1, in the timer module of operating system, at the timer of surveillance idle process, circling or whirl in the air with monitoring key articulates timer processing function then in the timer of not busy time.CPU, SRAM controlling sub by the system level power administration module, finish when system and reach certain threshold value free time, or keyboard free time is when reaching certain threshold value, system is changed to low power consumpting state, and checkout facility power management message table, whether have application program reserved a certain equipment, if do not have, call control module again and realize state exchange if checking.
2, apparatus for establishing power management decision-making mechanism specifically comprises:
(1) when task is visited this equipment, just opens this equipment, and begin supervision and management this equipment; When the task termination of this equipment of all-access, close this equipment;
(2) visit a plurality of equipment (for example interaction type input apparatus A and network equipment B) when task, and access order is when having dependence (B behind the first A), according to the following operating position of this dependence predict device;
A) when task is blocked in the device A access process for a long time, can provide foundation for closing device B
B) when task slave unit A recovers, can be used as the foundation of wake-up device B
(3) on the basis of above-mentioned condition, according to the device free time of existing several times, the device free time that prediction is following, when free time of predict device next time during greater than a certain threshold value, be equipment when being in electric energy that low power consumpting state saves, call control module device shutdown greater than the energy consumption expense of equipment state conversion.The prediction principle is as follows:
A) proportion that accounts for is big more near more device free time
B) when device free time and the actual free value of prediction differed greatly, the access module of devices illustrated changed, and dynamically adjusted the weight of the actual free value of increase
C) the task number of active state is few more, and the task execution chance of access means is many more, and the device free time, short more task priority was high more, and it is many more to carry out chance, and the device free time of task visit is short more
(3) realize the power management states conversion and control
According to the result of power management decision-making, specific implementation is responsible for the characteristic of shielding bottom different hardware to the state exchange of system, sheet inner part, peripherals, and provides unified power-management interface to the upper strata.
Concrete implementation step comprises:
1, realizes the state transition function of CPU from the normal operating condition to the idle condition;
2, realize the state transition function of CPU from the normal operating condition to the closed condition, comprise which interruption is set can wake CPU up;
2, realize that LCD's opens, closes function;
That 3, realizes network interface card opens, closes function.
Among Fig. 5, a left side 1 is for adding the preceding network interface card application program total energy consumption of power management, a left side 2 is the energy consumption of this method for managing power supply enforcement back application program, and right 1 and right 2 is the power consumptions of existing two kinds of classical method for managing power supply, and the energy-saving effect of this method for managing power supply is remarkable more.
Among Fig. 6, the energy consumption when only moving a network interface card application program on two left 1 group some display systems, system energy consumption behind the some position interpolation power management under the left side 1 is system energy consumption before the interpolation power management on the left side 1.The 2 groups of points in a left side are for moving two application programs simultaneously, and left 3 groups of points are for moving the energy consumption contrast situation of three application programs simultaneously.Number of applications is many more, and the chance that the application program of access means obtains CPU is few more, and the device free time is many more, and the energy-saving effect of this method for managing power supply is remarkable more.
Claims (8)
1, a kind of method of equipment being carried out dynamic power management in embedded OS comprises:
Collection and surveillance and device power supply (DPS) management related information when system moves comprise: obtain the information of system and task, cpu busy percentage information, task access means and the power state information of system and equipment;
By system-level and device level power management module, according to the power management message that obtains in information gathering and the monitor module, response and Processing tasks management and scheduling events, timer incident, peripheral hardware wake events, power supply emergency are then made a strategic decision according to certain rule;
According to the result of power management decision-making, specific implementation is to the state exchange of system, sheet inner part, peripherals,
Can shield the characteristic of bottom different hardware, and provide unified power-management interface to the upper strata.
2, method of equipment being carried out dynamic power management in embedded OS as claimed in claim 1 is characterized in that: the performing step of collection and surveillance and device power supply (DPS) management related information comprises:
During system initialization, participate in the equipment calls registration function of power management, manage device registration power management data structure, and articulate the control interface of each equipment to system level power;
In task management and scheduling, insert monitor module, catch task establishment, cancel, the task of the last operation of cpu busy percentage, CPU in a period of time recently is total and the information of visiting the priority of this equipment;
In device driver, at the forward and backward insertion monitor module of device access operation, the mission bit stream that obtains each device access start and end time, institute's access means and send request of access is as the historical information record of device access.
3, method of in embedded OS, equipment being carried out dynamic power management as claimed in claim 1, it is characterized in that: the implementation step that the system level power administration module is made a strategic decision comprises:
CPU, SRAM controlling sub by the system level power administration module, when system reaches certain threshold value free time, or input equipment free time is when reaching certain threshold value, checkout facility power management message table, whether check has application program to reserve a certain equipment, if do not have, call control module system is changed to low power state.
4, as claim 1 or 3 described methods of equipment being carried out dynamic power management in embedded OS, it is characterized in that: the implementation step that the device level power management module is made a strategic decision comprises:
When task is visited this equipment, just open this equipment, and begin supervision and management this equipment; When the task termination of this equipment of all-access, close this equipment;
When task is visited a plurality of equipment, has dependence as access order, according to the following operating position of this dependence predict device.
5, method of in embedded OS, equipment being carried out dynamic power management as claimed in claim 4, it is characterized in that: the implementation step that the device level power management module is made a strategic decision also comprises:
In device driver, according to the historical information record of device access, the device free time that prediction is following,
, call control module equipment is placed low power state during as free time of predict device next time greater than a certain threshold value.
6, a kind of system that in embedded OS, equipment is carried out dynamic power management, comprise: a system level power administration module and several device level power management modules that are linked with it, each power management module all comprises: monitor submodule, decision-making submodule and controlling sub
Monitor module obtains the information of system and task, cpu busy percentage information, task access means and the power state information of system and equipment;
Decision-making module is made a strategic decision according to the information that monitor module obtained, and is responsible for the wake events and the power supply emergency of processing and response task management and scheduling events, timed events, external unit simultaneously;
Control module according to the result of decision that decision-making module is made, is utilized driver or hardware abstraction layer, respectively total system, sheet inner part and peripherals is controlled the conversion of completion status.
7, the system that in embedded OS, equipment is carried out dynamic power management as claimed in claim 6, it is characterized in that: the system level power administration module also comprises: power events processing sub and power management applications interface,
The power events processing sub is used for when power events takes place, and this submodule calls corresponding apparatus and device level submodule;
The power management applications interface is used for the constraint that application program provides power management, and the power supply status of inquiry system and equipment provides support but regulate self behavior for the application program self-adaptation of perception power supply.
8, as claim 6 or the 7 described systems that in embedded OS, equipment carried out dynamic power management, it is characterized in that: the decision-making submodule in the device level power management module is with the situation of change reporting system level power supply administration module of device power supply (DPS) state, for the system level power management decision provides foundation.
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Cited By (13)
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| CN100385411C (en) * | 2006-07-04 | 2008-04-30 | 浙江大学 | Method for testing energy consumption of dynamic software in embedded system simulator |
| CN100428116C (en) * | 2006-09-08 | 2008-10-22 | 华南理工大学 | Dynamic power supply management construction based on embedded system |
| CN101201689B (en) * | 2006-12-13 | 2010-04-14 | 上海晨兴电子科技有限公司 | Method for automatically supervising CPU power consumption in multitask system |
| CN101067758B (en) * | 2007-06-14 | 2010-05-19 | 华南理工大学 | Energy consumption management method for inserting system |
| CN101344812B (en) * | 2008-08-19 | 2010-06-02 | 华南理工大学 | Magnetic disk dynamic power supply management method based on embedded system |
| CN101893932A (en) * | 2010-06-22 | 2010-11-24 | 中科方德软件有限公司 | Power management device based on linux system and management method thereof |
| US8140869B2 (en) | 2008-02-18 | 2012-03-20 | International Business Machines Corporation | Central power management |
| CN102890554A (en) * | 2011-07-22 | 2013-01-23 | 鸿富锦精密工业（深圳）有限公司 | Power supply management system and method |
| CN103442493A (en) * | 2013-09-03 | 2013-12-11 | 英华达（上海）科技有限公司 | Method, device, client, server and system for controlling power driving |
| CN103816576A (en) * | 2014-01-13 | 2014-05-28 | 哈尔滨工业大学深圳研究生院 | Bionic urination regulating and controlling device and control method thereof |
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| CN100385411C (en) * | 2006-07-04 | 2008-04-30 | 浙江大学 | Method for testing energy consumption of dynamic software in embedded system simulator |
| CN100428116C (en) * | 2006-09-08 | 2008-10-22 | 华南理工大学 | Dynamic power supply management construction based on embedded system |
| CN101201689B (en) * | 2006-12-13 | 2010-04-14 | 上海晨兴电子科技有限公司 | Method for automatically supervising CPU power consumption in multitask system |
| CN101067758B (en) * | 2007-06-14 | 2010-05-19 | 华南理工大学 | Energy consumption management method for inserting system |
| US8140869B2 (en) | 2008-02-18 | 2012-03-20 | International Business Machines Corporation | Central power management |
| CN101344812B (en) * | 2008-08-19 | 2010-06-02 | 华南理工大学 | Magnetic disk dynamic power supply management method based on embedded system |
| CN101893932A (en) * | 2010-06-22 | 2010-11-24 | 中科方德软件有限公司 | Power management device based on linux system and management method thereof |
| CN102890554A (en) * | 2011-07-22 | 2013-01-23 | 鸿富锦精密工业（深圳）有限公司 | Power supply management system and method |
| CN103442493A (en) * | 2013-09-03 | 2013-12-11 | 英华达（上海）科技有限公司 | Method, device, client, server and system for controlling power driving |
| CN103816576A (en) * | 2014-01-13 | 2014-05-28 | 哈尔滨工业大学深圳研究生院 | Bionic urination regulating and controlling device and control method thereof |
| CN107506021A (en) * | 2017-09-07 | 2017-12-22 | 南京莱斯信息技术股份有限公司 | Blank pipe simulated training cooperative control system and control method |
| CN113632045A (en) * | 2019-04-08 | 2021-11-09 | 三星电子株式会社 | Method for controlling external device and electronic device |
| CN110320813A (en) * | 2019-07-29 | 2019-10-11 | 青岛海尔科技有限公司 | Intelligent electrical appliance control and device based on Internet of Things operating system |
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Granted publication date: 20080730 Termination date: 20121108 |