CN105550023B - A kind of processing method and processing device of timer event - Google Patents
A kind of processing method and processing device of timer event Download PDFInfo
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- CN105550023B CN105550023B CN201510888890.9A CN201510888890A CN105550023B CN 105550023 B CN105550023 B CN 105550023B CN 201510888890 A CN201510888890 A CN 201510888890A CN 105550023 B CN105550023 B CN 105550023B
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- timer event
- timer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/48—Program initiating; Program switching, e.g. by interrupt
- G06F9/4806—Task transfer initiation or dispatching
- G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
- G06F9/4825—Interrupt from clock, e.g. time of day
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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 kind of processing method and processing devices of timer event, to solve the problems, such as that system effectiveness caused by the frequent Timer event of system is low, power consumption is big.This method are as follows: determine the expection expiration time and maximum allowable delay time of first timer event, and determine time interval determined by the expected expiration time and the maximum allowable delay time；If it is determined that the timer event in list of thing there are expiration time in the time interval, second timer event of the expiration time in the time interval in the list of thing is selected, sets the expiration time of the first timer event to the expiration time of the second timer event；According to the expiration time of setting, the first timer event is added in the list of thing.
Description
Technical field
The present invention relates to field of computer technology more particularly to a kind of processing method and processing devices of timer event.
Background technique
(SuSE) Linux OS early stage realizes operating system scheduling, the TICK of each second by periodic beat (TICK)
Number is defined by HZ, and HZ indicates that being used to define each second has timer interruption several times, and general HZ is 100, i.e. each second has
100 TICK realize that periodic TICK wakes up by the timer (Timer) of 10 milliseconds (ms).The mechanism does not have in system
When anything needs to handle and every 10ms has a Timer event triggering to interrupt, the fortune for causing system to be not necessarily to
Row.
In order to solve this problem, NOHZ mechanism is used in Linux, which does not take periodic TICK mechanism, and
It is that Timer is arranged according to the Timer event of system.
Specifically, as shown in Figure 1, when needing timing function, a data structure Ti mer is defined, and carry out Timer thing
Part initialization, the processing function with the expiration time (expires) of the clearly Timer event and after expiring, and by the Timer thing
Part is added in the Timer list of thing of system.System is ranked up all Timer events, and expiration time is closest to currently
The Timer event of time comes front.Previous Timer event then, obtain the expiration time of next Timer event into
Row setting, i.e., the expiration time of next Timer event is arranged into the timer of hardware, timer time then generates afterwards
One timer interruption executes the processing function of the Timer event.
But since the Timer event in linux kernel is especially more, all even with NOHZ mechanism, system is still
There is frequent Timer event triggering to interrupt, relative to the periodical TICK of every 10ms, effect of optimization is limited.
Summary of the invention
The embodiment of the present invention provides a kind of processing method and processing device of timer event, frequent to solve system
The problem that system effectiveness caused by Timer event is low, power consumption is big.
Specific technical solution provided in an embodiment of the present invention is as follows:
The embodiment of the invention provides a kind of processing methods of timer event, comprising:
It determines the expection expiration time and maximum allowable delay time of first timer event, and is anticipated described in determination
Time interval determined by time phase and the maximum allowable delay time；
If it is determined that the timer event in list of thing there are expiration time in the time interval, selects the event
Second timer event of the expiration time in the time interval in list, by the expiration time of the first timer event
It is set as the expiration time of the second timer event；
According to the expiration time of setting, the first timer event is added in the list of thing.
Preferably, the first timer event belongs to non-precision timing-type.
Preferably, after the first timer event is added in the list of thing, the method also includes:
According to the expiration time of the first timer event be arranged timer, the timer then after, execute institute
The processing function of first timer event is stated, and executes all institutes identical with the expiration time of the first timer event
State the processing function of second timer event.
Preferably, selecting second timer event of the expiration time in the time interval in the list of thing, wrap
It includes:
If it is determined that timer event of the expiration time in the time interval only has one in the list of thing, by institute
It states timer event and is determined as the second timer event；
If it is determined that timer event of the expiration time in the time interval is greater than one in the list of thing, selection
The timer event of the expiration time the latest is determined as by the timer event of expiration time the latest in the time interval
The second timer event.
Preferably, determining the expection expiration time and maximum allowable delay time of first timer event, comprising:
According between type belonging to preset timer event and expected expiration time and maximum allowable delay time
Corresponding relationship, determine the corresponding expected expiration time of the first timer event and maximum allowable delay time.
Preferably, the method also includes:
If it is determined that timer event of the expiration time in the time interval is not present in the list of thing, it will be described
The expiration time of first timer event is set as the expected expiration time.
The embodiment of the invention also provides a kind of processing units of timer event, comprising:
First processing module, for determining the expection expiration time and maximum allowable delay time of first timer event,
And determine time interval determined by the expected expiration time and the maximum allowable delay time；
Second processing module, for if it is determined that timer in list of thing there are expiration time in the time interval
Event selects second timer event of the expiration time in the time interval in the list of thing, described first is determined
When device event expiration time be set as the expiration time of the second timer event；
For the expiration time according to setting the event is added in the first timer event by third processing module
In list.
Preferably, the first timer event belongs to non-precision timing-type.
Preferably, further including fourth processing module, it is used for:
According to the expiration time of the first timer event be arranged timer, the timer then after, execute institute
The processing function of first timer event is stated, and executes all institutes identical with the expiration time of the first timer event
State the processing function of second timer event.
Preferably, the Second processing module is specifically used for:
If it is determined that timer event of the expiration time in the time interval only has one in the list of thing, by institute
It states timer event and is determined as the second timer event；
If it is determined that timer event of the expiration time in the time interval is greater than one in the list of thing, selection
The timer event of the expiration time the latest is determined as institute by the timer event of expiration time the latest in the time interval
State second timer event.
Preferably, the first processing module is specifically used for:
According between type belonging to preset timer event and expected expiration time and maximum allowable delay time
Corresponding relationship, determine the corresponding expected expiration time of the first timer event and maximum allowable delay time.
Preferably, the Second processing module is also used to:
If it is determined that timer event of the expiration time in the time interval is not present in the list of thing, it will be described
The expiration time of first timer event is set as the expected expiration time.
Based on the above-mentioned technical proposal, in the embodiment of the present invention, by the expection expiration time that first timer event is arranged
With maximum allowable delay time, when determining the expection expiration time and corresponding maximum allowable delay time of first timer event
Between section, when the second timer event that there are expiration times in determining list of thing in the time interval, first is determined
When device event expiration time be set as the expiration time of the second timer event after, be added in list of thing, so as to
It is enough to trigger multiple timer events in the same expiration time, avoid the effect of system caused by the frequent Timer event of system
The problem that rate is low, power consumption is big, improves system effectiveness, reduces system power dissipation.
Detailed description of the invention
Fig. 1 is existing timer event treatment process schematic diagram；
Fig. 2 is timer event treatment process schematic diagram in the embodiment of the present invention；
Fig. 3 is the specific implementation process schematic of timer event processing in the embodiment of the present invention；
Fig. 4 is the processing device structure diagram of timer event in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
It should be noted that operating system applied by following embodiment can be (SuSE) Linux OS, it is also possible to it
Its any operating system with timing trigger function.
In following embodiment, definition timer event includes at least expiration time and processing function, a timer thing
Part is used to describe the processing function of required execution after the time that triggering is interrupted and triggering interruption.
In the embodiment of the present invention, as shown in Fig. 2, the treatment process of timer event is as follows:
Step 201: determining the expection expiration time and maximum allowable delay time of first timer event, and determine the
Time interval determined by the expection expiration time and maximum allowable delay time of one timer event.
Preferably, when the type according to belonging to preset timer event and expected expiration time and maximum allowable delay
Between between corresponding relationship, determine the corresponding expected expiration time of first timer event and maximum allowable delay time.
In implementation, timer event is classified, the timer event for not needing accurate timing is divided into non-precisely
The timer event for needing accurate timing is divided into accurate timing type by timing-type.For determining for non-precision timing-type
When device event the maximum allowable delay time of the timer event is arranged according to the corresponding processing function of the timer event.It is right
In the timer event of accurate timing type, maximum allowable delay time is not present.
Specifically, Timer event is divided into the different of timing accuracy demand by two types according to timer event: essence
True timing-type TIMER_ACCURATE and non-precision timing-type TIMER_NO_ACCURATE, and to TIMER_NO_
The Timer event of ACCURATE type increases maximum allowable delay time no_accurate_timer_delay, for example, this is most
The big value for allowing delay time can be 100ms, 200ms or 500ms.
Specifically, calculate first timer event expection expiration time and maximum allowable delay time and, obtain with
Value, the corresponding time interval of first timer event are as follows: it is expected that expiration time and section determined by be calculated and value.
Step 202: if it is determined that the timer event in list of thing there are expiration time in the time interval, selection
Second timer event of the expiration time in the time interval, the expiration time of first timer event is set in list of thing
It is set to the expiration time of second timer event.
In implementation, however, it is determined that timer event of the expiration time in the time interval is not present in list of thing, it will
The expiration time of first timer event is set as expected expiration time.
Preferably, if it is determined that timer thing of the expiration time in the time interval of first timer event in list of thing
Part only has one, and timer event of the expiration time in the time interval in the list of thing is determined as second timer thing
Part；If it is determined that timer event of the expiration time in the time interval of first timer event is greater than one in list of thing,
Select in the list of thing that expiration time is in multiple timer events in the time interval, the timer of expiration time the latest
The timer event of the expiration time of selection the latest is determined as second timer event by event.
In the embodiment, multiple timer things in the time interval of first timer event will be located in list of thing
In part, the timer event of expiration time the latest is determined as second timer event, using expiring for the second timer event
The expiration time of first timer event is arranged in time, can reduce down trigger number to greatest extent, further improve
System effectiveness, and further reduced system power dissipation.
Step 203: according to the expiration time of setting, first timer event being added in list of thing.
Preferably, after first timer event is added in list of thing, according to first timer event when expiring
Between timer is set, after expiration of the timer, execute the processing function of first timer event, and execute it is all with it is first fixed
When device event the identical second timer event of expiration time processing function.
In a specific embodiment, as shown in figure 3, defining Timer event uses timer_list data structure,
The timing-type and timing-type that increase Timer event in timer_list data structure are the timer event of non-precision timing
Maximum allowable delay time, timer_list data structure definition is as follows:
struct timer_list{
struct list_head list；
unsigned int timer_type；The timing-type of // definition Timer event
unsigned long expires；The expection expiration time of // definition Timer event
unsigned int no_accurate_timer_delay；// define the Timer time of non-precision timing most
It is big to allow delay time
unsigned long data；
void(*function)(unsigned long)；The processing function of // definition Timer event
}；
Wherein, the value of timer_type can be TIMER_ACCURATE or TIMER_NO_ACCURAT.no_
The value of accurate_timer_delay may is that 100 milliseconds, 200 milliseconds or 500 milliseconds.
Timer event is initialized according to data structure defined above, specifically: to timer_type, no_
Accurate_timer_delay and processing function are initialized.If the value of timer_type indicates the Timer thing
Part belongs to accurate timing type, then the value of no_accurate_timer_delay is zero, if the value table of timer_type
Show that the Timer event belongs to non-precision timing-type, then the value of no_accurate_timer_delay be set as needed for
100ms, 200ms or 500ms.
By calling correlation function (such as add_Timer function) to increase to Timer event in list of thing, specifically,
Time interval is determined according to the no_accurate_timer_delay of Timer event and expires, is judged in list of thing
It whether there is Timer event in the time interval；If it does not exist, which is inserted into list of thing, the Timer
The expires of event is constant；If it exists, using the Timer event for having existed and being located in the time interval in list of thing
Expiration time, update the expires of the Timer event of list of thing to be added, and by the list of thing to be added
Timer event is inserted into the corresponding position of the list of thing.
Using Timer event expires value be arranged hardware timer, wait hardware timer then after, execute should
The processing function of Timer event.
Based on the same inventive concept, a kind of processing unit of timer event is additionally provided in the embodiment of the present invention, the dress
The specific implementation set can be found in the description of embodiment of the method, and overlaps will not be repeated, as shown in figure 4, the device mainly includes:
First processing module 401, for determining the expection expiration time of first timer event and when maximum allowable delay
Between, and determine time interval determined by the expected expiration time and the maximum allowable delay time；
Second processing module 402, for if it is determined that determining in the time interval in list of thing there are expiration time
When device event, second timer event of the expiration time in the time interval in the list of thing is selected, by described
The expiration time of one timer event is set as the expiration time of the second timer event；
For the expiration time according to setting the thing is added in the first timer event by third processing module 403
In part list.
Wherein, the first timer event belongs to non-precision timing-type.
In implementation, the Second processing module is also used to:
If it is determined that timer event of the expiration time in the time interval is not present in the list of thing, it will be described
The expiration time of first timer event is set as the expected expiration time.
Preferably, further including fourth processing module 404, it is used for:
According to the expiration time of the first timer event be arranged timer, the timer then after, execute institute
The processing function of first timer event is stated, and executes all institutes identical with the expiration time of the first timer event
State the processing function of second timer event.
Preferably, the Second processing module is specifically used for:
If it is determined that timer event of the expiration time in the time interval only has one in the list of thing, by institute
It states timer event and is determined as the second timer event；
If it is determined that timer event of the expiration time in the time interval is greater than one in the list of thing, selection
The timer event of selection is determined as the second timer by the timer event of expiration time the latest in the time interval
Event.
In the embodiment, multiple timer things in the time interval of first timer event will be located in list of thing
In part, the timer event of expiration time the latest is determined as second timer event, using expiring for the second timer event
The expiration time of first timer event is arranged in time, can reduce down trigger number to greatest extent, further improve
System effectiveness, and further reduced system power dissipation.
Preferably, the first processing module is specifically used for:
According between type belonging to preset timer event and expected expiration time and maximum allowable delay time
Corresponding relationship, determine the corresponding expected expiration time of the first timer event and maximum allowable delay time.
Based on the above-mentioned technical proposal, in the embodiment of the present invention, by the expection expiration time that first timer event is arranged
With maximum allowable delay time, when determining the expection expiration time and corresponding maximum allowable delay time of first timer event
Between section, when the second timer event that there are expiration times in determining list of thing in the time interval, first is determined
When device event expiration time be set as the expiration time of the second timer event after, be added in list of thing, so as to
It is enough to trigger multiple timer events in the same expiration time, avoid the effect of system caused by the frequent Timer event of system
The problem that rate is low, power consumption is big, improves system effectiveness, reduces system power dissipation.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. a kind of processing method of timer event characterized by comprising
When determining the expection expiration time and maximum allowable delay time of first timer event, and determining that the expection expires
Between and the maximum allowable delay time determined by time interval；
If it is determined that the timer event in list of thing there are expiration time in the time interval, selects the list of thing
The expiration time of the first timer event is arranged second timer event of the middle expiration time in the time interval
For the expiration time of the second timer event；
According to the expiration time of setting, the first timer event is added in the list of thing.
2. the method as described in claim 1, which is characterized in that the first timer event belongs to non-precision timing-type.
3. the method as described in claim 1, which is characterized in that the first timer event to be added in the list of thing
Later, the method also includes:
According to the expiration time of the first timer event, timer is set, the timer then after, execute described the
The processing function of one timer event, and execute all identical with the expiration time of the first timer event described the
The processing function of two timer events.
4. method as claimed in claim 1,2 or 3, which is characterized in that select in the list of thing expiration time described
Second timer event in time interval, comprising:
If it is determined that timer event of the expiration time in the time interval only has one in the list of thing, it will be described fixed
When device event be determined as the second timer event；
If it is determined that timer event of the expiration time in the time interval is greater than one in the list of thing, select in institute
The timer event of expiration time the latest in time interval is stated, the timer event of the expiration time the latest is determined as described
Second timer event.
5. the method as described in claim 1, which is characterized in that determine the expection expiration time and maximum of first timer event
Allow delay time, comprising:
According to pair between type belonging to preset timer event and expected expiration time and maximum allowable delay time
It should be related to, determine the corresponding expected expiration time of the first timer event and maximum allowable delay time.
6. the method as described in claim 1, which is characterized in that the method also includes:
If it is determined that timer event of the expiration time in the time interval is not present in the list of thing, by described first
The expiration time of timer event is set as the expected expiration time.
7. a kind of processing unit of timer event characterized by comprising
First processing module, for determining the expection expiration time and maximum allowable delay time of first timer event, and
Determine time interval determined by the expected expiration time and the maximum allowable delay time；
Second processing module, for if it is determined that the timer thing that there are expiration times in the time interval in list of thing
Part selects second timer event of the expiration time in the time interval in the list of thing, by first timing
The expiration time of device event is set as the expiration time of the second timer event；
For the expiration time according to setting the list of thing is added in the first timer event by third processing module
In.
8. device as claimed in claim 7, which is characterized in that the first timer event belongs to non-precision timing-type.
9. device as claimed in claim 7, which is characterized in that further include fourth processing module, be used for:
According to the expiration time of the first timer event, timer is set, the timer then after, execute described the
The processing function of one timer event, and execute all identical with the expiration time of the first timer event described the
The processing function of two timer events.
10. the device as described in claim 7,8 or 9, which is characterized in that the Second processing module is specifically used for:
If it is determined that timer event of the expiration time in the time interval only has one in the list of thing, it will be described fixed
When device event be determined as the second timer event；
If it is determined that timer event of the expiration time in the time interval is greater than one, described in selection in the list of thing
The timer event of the expiration time the latest is determined as described by the timer event of expiration time the latest in time interval
Two timer events.
11. device as claimed in claim 7, which is characterized in that the first processing module is specifically used for:
According to pair between type belonging to preset timer event and expected expiration time and maximum allowable delay time
It should be related to, determine the corresponding expected expiration time of the first timer event and maximum allowable delay time.
12. device as claimed in claim 7, which is characterized in that the Second processing module is also used to:
If it is determined that timer event of the expiration time in the time interval is not present in the list of thing, by described first
The expiration time of timer event is set as the expected expiration time.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299193A (en) * | 2008-04-07 | 2008-11-05 | 谢维信 | Method for enhancing computer inner core timer control precision |
| CN101719080A (en) * | 2009-12-25 | 2010-06-02 | 联想网御科技(北京)有限公司 | Multi-core timer implementing method and system |
| CN104683136A (en) * | 2013-11-29 | 2015-06-03 | 杭州迪普科技有限公司 | DHCP (dynamic host configuration protocol) time delay event processing method and device |
| CN104834347A (en) * | 2015-04-29 | 2015-08-12 | 杭州东信捷峻科技有限公司 | Implementation method for dynamic time duration timer in favor of low power consumption and free of accumulated error |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7477575B2 (en) * | 2005-09-23 | 2009-01-13 | Verisign, Inc. | Redundant timer system and method |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299193A (en) * | 2008-04-07 | 2008-11-05 | 谢维信 | Method for enhancing computer inner core timer control precision |
| CN101719080A (en) * | 2009-12-25 | 2010-06-02 | 联想网御科技(北京)有限公司 | Multi-core timer implementing method and system |
| CN104683136A (en) * | 2013-11-29 | 2015-06-03 | 杭州迪普科技有限公司 | DHCP (dynamic host configuration protocol) time delay event processing method and device |
| CN104834347A (en) * | 2015-04-29 | 2015-08-12 | 杭州东信捷峻科技有限公司 | Implementation method for dynamic time duration timer in favor of low power consumption and free of accumulated error |
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