CN107678779A - A kind of timed task performs method and electronic equipment - Google Patents
A kind of timed task performs method and electronic equipment Download PDFInfo
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- CN107678779A CN107678779A CN201710890471.8A CN201710890471A CN107678779A CN 107678779 A CN107678779 A CN 107678779A CN 201710890471 A CN201710890471 A CN 201710890471A CN 107678779 A CN107678779 A CN 107678779A
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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
- G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
- G06F9/30094—Condition code generation, e.g. Carry, Zero flag
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0751—Error or fault detection not based on redundancy
- G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
- G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
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Abstract
The present embodiments relate to presetting apparatus field, discloses a kind of timed task and performs method and electronic equipment.Timed task in the present invention performs method, including：When adding timed task, the initial value for being timed task arrange parameter Tr, Tr is present system time Tc；Using preset duration △ t as interval, Tr is updated using Tc；Wherein, before renewal Tr every time, in addition to：Calculating difference E, E=Tr Tc, if E and △ t difference exceedes preset range, the expiration time Te of timed task is corrected using E；When reaching Te, timed task is performed.So that system time, after saltus step occurs, the execution time of timed task follows renewal, ensure that timed task is accurately performed.
Description
Technical field
The present embodiments relate to presetting apparatus field, more particularly to timed task performs method.
Background technology
Application program tends to rely on system time, specific time point perform statistical log output, network detection with
And other mission criticals.But system time is not permanent stabilization, time server is synchronous, manual intervention modification time situations such as
Under, time saltus step occurs in system.
Inventor has found that at least there are the following problems in the prior art：In the case of system time saltus step, timing be present and appoint
The problem of business could not perform as scheduled.Specific situation may be as follows：When system time backward change by (future directions), those misidentifications
It may be performed in advance for expired task；When system time forward (past direction) change when, depending on the time adjustment amplitude,
Timed task may postpone for a long time could be back to normal.This will largely effect on the execution accuracy of timed task.
The content of the invention
The purpose of embodiment of the present invention is that providing a kind of timed task performs method and electronic equipment so that during system
Between after saltus step occurs, execution time of timed task follows renewal, ensures that timed task is accurately performed.
In order to solve the above technical problems, embodiments of the present invention, which provide a kind of timed task, performs method, including：
It is the timed task arrange parameter Tr, the initial value of the Tr is present system time Tc when adding timed task；With default
Duration △ t update the Tr as interval using the Tc；Wherein, before the Tr is updated every time, in addition to：It is poor to calculate
Value E, the E=Tr-Tc, if | E | and the difference of the △ t exceedes preset range, and the timed task is corrected using the E
Expiration time Te；When reaching the Te, the timed task is performed.
Embodiments of the present invention additionally provide a kind of electronic equipment, including：At least one processor；And with it is described
The memory of at least one processor communication connection；Wherein, the memory storage, which has, to be held by least one processor
Capable instruction, the instruction is by least one computing device, so that at least one processor is able to carry out as above
The timed task stated performs method.
Embodiments of the present invention additionally provide a kind of electronic equipment, computer-readable recording medium, are stored with computer
Program, the computer program realize that above-mentioned timed task performs method when being executed by processor.
In terms of existing technologies, the main distinction and its effect are embodiment of the present invention：Newly-increased parameter Tr is carried out
Transition detection, specifically：Every △ t durations, Tr and Tc size are compared, if both differences and △ t mistake
Difference is in tolerance interval, then it is assumed that does not have time saltus step, when error is excessive, it is believed that time of occurrence saltus step.So, you can
When determining saltus step, it is updated to performing time Te, specifically, by E and the time correlation of institute's saltus step, so utilizing E pairs
The execution time of timed task is corrected, and ensures that timed task is executed correctly.It can be seen that the timing in embodiment of the present invention
Task executing method causes system time after saltus step occurs, and the execution time of timed task follows renewal, ensures timed task
Accurately performed.
As a further improvement, the expiration time Te that the timed task is corrected using E, is specially：Utilize Te '=
Te-E, correct the Te；Wherein, the Te ' is the expiration time after correction.School directly is carried out to Te using the mode for subtracting E
Just, method is easy to be quick, and algorithm is easy.
As a further improvement, the expiration time Te that the timed task is corrected using E, is specially：Work as E>0, then
Te '=Te-E- △ t are utilized, correct the Te；Work as E<0, then using Te '=Te-E+ △ t, correct the Te；Wherein, it is described
Te ' is the expiration time after correction.According to E positive and negative values, the direction of time saltus step is determined, and Te is finely adjusted with reference to △ t,
So that the Te after correction is more accurate.
As a further improvement, the preset range is empirically determined, or, the preset range is (- ε1,+ε2)；Its
In, the ε1And ε2Span be greater than or equal to 30, and less than or equal to 60.Because time saltus step has certain connect
By scope, too small scope make it that adjustment frequency is too high, is unfavorable for the normal operation of system, can rule of thumb set and more close
Suitable scope, when ensureing that timed task correctly performs, the load to system is reduced as far as possible.
As a further improvement, the ε1Equal to the ε2.It is relative to the symmetrical scope of zero point by range set, is counting
Calculate and can further simplify algorithm flow during comparing.
As a further improvement, the timed task is：Export statistical log or network detection.
As a further improvement, △ t are more than or equal to 3 seconds, and less than or equal to 10 seconds.
Brief description of the drawings
One or more embodiments are illustrative by the picture in corresponding accompanying drawing, these exemplary theorys
The bright restriction not formed to embodiment, the element for having same reference numbers label in accompanying drawing are expressed as similar element, removed
Non- have a special statement, and composition does not limit the figure in accompanying drawing.
Fig. 1 is that the timed task in first embodiment of the invention performs method flow diagram；
Fig. 2 is that the timed task in second embodiment of the invention performs method flow diagram；
Fig. 3 is the structural representation of the electronic equipment in third embodiment of the invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs
With many variations based on following embodiment and modification, the application technical scheme claimed can also be realized.
The first embodiment of the present invention is related to a kind of timed task and performs method.
Present inventor has found, in the major cycle of application program, by the difference of surrounding time, can simply sentence
Whether break there occurs time saltus step, and the execution time to timed task is corrected.But in all timed tasks, the time jumps
Its execution time of being added after change for task is accurate, and need not be corrected；How task time saltus step before and after is distinguished, and it is right
Task before saltus step carries out time adjustment, and all timed tasks could be caused to perform on schedule.Based on above-mentioned thought, this implementation
The flow of mode is as shown in figure 1, specific as follows：
Step 101, timed task is added, for timed task arrange parameter (i.e.：Tr).
Specifically, it is necessary to set expiration time (i.e. for timed task while timed task is added：Te), meanwhile,
The newly-increased initial value that parameter a Tr, Tr is set for present system time (i.e.：Tc).
Timing in present embodiment thinks it can is output statistical log or network detection, can also be that other timings are appointed
Business, is not limited herein.
Step 102, preset duration is started (i.e.：△ t) countdown.
Step 103, judge whether countdown is completed；If so, then perform step 104；Step 103 is performed if it is not, then returning.
Specifically, step 102 and 103 is to judge whether the △ t as time interval reach.
Step 104, using E=Tr-Tc, E is calculated.
Step 105, judge whether the difference of E and preset duration exceedes preset range；If so, then continue executing with step 106；
If it is not, then perform step 108.
Step 106, Te is corrected using Te-E value.
That is, when reaching △ t, calculating difference E, E=Tr-Tc, if saltus step does not occur, ideally E
Value should be-△ t, so E and △ t difference should be zero, in principle, as long as E and △ t difference is not zero, exactly send out
Saltus step is given birth to, but in practical application, if be also corrected to small saltus step, correction may be excessively frequent, and the present inventor
It was found that small saltus step does not interfere with the normal execution of task substantially, so present inventor proposes a preset range,
When E and △ t difference exceedes preset range, just using E correct timed task expiration time Te, E and △ t difference not
During more than preset range, just without correcting, the complexity of algorithm can be thus reduced.
Specific updating formula is Te '=Te-E；Wherein, Te ' is the expiration time after correction, and Te is arriving before correcting
Time phase.If it should be noted that E>0, then Tr>Tc, illustrate the time to past saltus step；If E<0, then Tr<Tc, during explanation
Between to following saltus step.When the saltus step of time to past, Te '=Te-E<Te, Te correct to time in the past, are jumped when time to future
During change, Te '=Te-E>Te, Te correct to future time.It can be seen that although during time saltus step, both may to future time saltus step,
Can also be to time in the past saltus step, according to this updating formula, it is possible to while the correction of both saltus step situations is taken into account, calculate
Method is easy.
Step 107, Tr is updated using Tc.
Specifically, system updates Tr using △ t as interval using Tc；Wherein, before renewal Tr every time, in addition to
Step 104 is to step 106.
In practical application, the sequencing of step 106 and step 107 can not limit, and actually first carry out step 107, then
Perform the accuracy that step 106 nor affects on saltus step correction.
Step 108, judge whether to reach Te；If so, then perform step 109；Step 102 is performed if it is not, then returning.
Specifically, during system normal service, Task-list can be traveled through, all timed tasks can be included in Task-list,
If present system time Tc reaches the Te set in step 101, step 109 is performed；If not up to, return continues to examine
Survey.
Step 109, timed task is performed.
Specifically, when reaching Te, timed task is performed.It can be seen that before Te is reached, can repeat
Transition detection, the time interval of adjacent transition detection twice is △ t, once detection time saltus step, then carry out Te correction, together
When, regardless of whether detection time saltus step, Tr can be updated to present system time Tc.
In terms of existing technologies, the main distinction and its effect are present embodiment：Newly-increased parameter Tr carries out saltus step
Detection, specifically：Every △ t durations, Tr and Tc size are compared, if both differences and △ t error exist
In tolerance interval, then it is assumed that there is no time saltus step, when error is excessive, it is believed that time of occurrence saltus step.So, you can it is determined that
During saltus step, it is updated to performing time Te, specifically, by E and the time correlation of institute's saltus step, so using E to timing
The execution time of task is corrected, and ensures that timed task is executed correctly.It can be seen that the timed task in present embodiment performs
Method causes system time after saltus step occurs, and the execution time of timed task follows renewal, ensures that timed task is accurately held
OK.
It should be noted that the preset range of corresponding E and △ t difference can be (- ε1,+ε2)；Wherein, ε1And ε2Take
Value scope is greater than or equal to 30, and less than or equal to 60.Such as ε1For 30, ε2For 60, then preset range be (- 30 ,+
60).Meanwhile △ t can be more than or equal to 3 seconds, and less than or equal to 10 seconds.In order to avoid renewal interval short-range missile causes frequently more
Newly, compartment is long leads to not timely discovery time saltus step, it is possible to △ t are configured according to application scenarios, typically will
It is arranged to 3-10s.
Present inventor has found, can influence the time saltus step that task normally performs and be significantly larger than △ t, generally 30-
60s, so the preset range set accordingly can be seen that when E and △ t difference exceeds above range, that is, it is less than-ε1,
Or more than ε2When, it is believed that there occurs time saltus step.It can further say, in order to reduce intermediate quantity, ε can be set1Equal to ε2,
This scope is arranged with respect to the symmetrical scope of zero point, can further simplify algorithm stream during calculating and comparison
Journey.So, when calculating, E absolute value and △ t difference can be directly calculated, and is compared with a unilateral scope,
The absolute value for being exactly E subtracts whether △ t are more than ε1(such as 30s), if greater than ε1, it is taken as that there occurs saltus step.
Second embodiment of the present invention is related to a kind of timed task and performs method.Second embodiment and the first embodiment party
Formula is roughly the same, is in place of the main distinction：In the first embodiment, formula when correcting Te is Te '=Te-E.And at this
In invention second embodiment, the formula of timing is using the Stepwise calibration formula for being related to △ t so that the Te after correction is more smart
Really.
Flow chart in present embodiment is as shown in Fig. 2 specific as follows：
Step 201 is similar to step 105 with the step 101 in first embodiment to step 205, no longer superfluous herein
State.
Step 206, Te is corrected using segmentation formula.
Specific formula is as follows：
Work as E>0, then utilize Te '=Te-E- △ t；
Work as E<0, then utilize Te '=Te-E+ △ t；
Wherein, Te ' is the expiration time after correction.
Specifically, when time interval reaches △ t, Tc has walked △ t durations backward, and Tr is not changed, institute
With Tr=Tc- △ t now, if now E>0, Tc there occurs the saltus step to time in the past, and the current time Tc ' after saltus step=
Tc-A；(assuming that A is saltus step amount), so T can be drawn by following derivation>Updating formula when 0：Te '=Te-A=Te-Tc
+ Tc '=Te-Tr- △ t+Tc '=Te-E- △ t；Similarly, in E<When 0, above-mentioned formula can also be obtained by similar derivation.Can
See, the closest actual values of Te are corrected using above-mentioned segmentation formula.
Step 207 is similar to step 109 with the step 107 in first embodiment to step 209, no longer superfluous herein
State.
It can be seen that according to E positive and negative values in present embodiment, the direction of time saltus step is determined, and according to different saltus step sides
To being finely adjusted with reference to △ t to Te so that the Te after correction is more accurate.
The step of various methods divide above, be intended merely to describe it is clear, can be merged into when realizing a step or
Some steps are split, are decomposed into multiple steps, as long as including identical logical relation, all protection domain in this patent
It is interior；To either adding inessential modification in algorithm in flow or introducing inessential design, but its algorithm is not changed
Core design with flow is all in the protection domain of the patent.
Third embodiment of the invention is related to a kind of electronic equipment, as shown in figure 3, including：At least one processor；With
And the memory being connected with least one processor communication；Wherein, have can be by least one computing device for memory storage
Instruction, is instructed by least one computing device, so that at least one processor is able to carry out timed task described above and performed
Method.
Wherein, memory is connected with processor using bus mode, and bus can include the bus of any number of interconnection
And one or more processors and the various of memory are electrically connected to together by bridge, bus.Bus can also will be such as peripheral
The various other of equipment, voltage-stablizer and management circuit or the like are electrically connected to together, and these are all well known in the art
, therefore, no longer it is described further herein.EBI provides interface between bus and transceiver.Transceiver
Can be an element or multiple element, such as multiple receivers and transmitter, there is provided for over a transmission medium with
The unit of various other device communications.The data handled through processor are transmitted on the radio medium by antenna, further,
Antenna also receives data and transfers data to processor.
Processor is responsible for bus and common processing, can also provide various functions, including regularly, peripheral interface,
Voltage-regulation, power management and other control functions.And memory can be used to store processor in execution operation when institute
The data used.
Four embodiment of the invention is related to a kind of computer-readable recording medium, is stored with computer program.Computer
Above method embodiment is realized when program is executed by processor.
That is, it will be understood by those skilled in the art that realize that all or part of step in above-described embodiment method is can be with
The hardware of correlation is instructed to complete by program, the program storage is in the storage medium, including some instructions are making
Obtain an equipment (can be single-chip microcomputer, chip etc.) or processor (processor) performs each embodiment method of the application
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of timed task performs method, it is characterised in that including：
It is the timed task arrange parameter Tr, the initial value of the Tr is present system time Tc when adding timed task；
Using preset duration △ t as interval, the Tr is updated using the Tc；Wherein, before the Tr is updated every time, also wrap
Include：Calculating difference E, the E=Tr-Tc, if E and the △ t difference exceed preset range, using described in E corrections
The expiration time Te of timed task；
When reaching the Te, the timed task is performed.
2. timed task according to claim 1 performs method, it is characterised in that described to correct the timing times using E
The expiration time Te of business, it is specially：
Te '=Te-E is utilized, corrects the Te；Wherein, the Te ' is the expiration time after correction.
3. timed task according to claim 1 performs method, it is characterised in that described to correct the timing times using E
The expiration time Te of business, it is specially：
Work as E>0, then using Te '=Te-E- △ t, correct the Te；
Work as E<0, then using Te '=Te-E+ △ t, correct the Te；
Wherein, the Te ' is the expiration time after correction.
4. timed task according to claim 1 performs method, it is characterised in that the preset range is rule of thumb true
It is fixed, or, the preset range is (- ε1,+ε2)；Wherein, the ε1And ε2Span be greater than or equal to 30, and be less than or
Equal to 60.
5. timed task according to claim 4 performs method, it is characterised in that the ε1Equal to the ε2。
6. timed task according to claim 1 performs method, it is characterised in that the timed task is：Output statistics
Daily record or network detection.
7. timed task according to claim 1 performs method, it is characterised in that the △ t are more than or equal to 3 seconds, and
Less than or equal to 10 seconds.
8. a kind of electronic equipment, it is characterised in that including：
At least one processor；And
The memory being connected with least one processor communication；Wherein,
The memory storage has can be by the instruction of at least one computing device, and the instruction is by least one place
Manage device to perform, so that the timed task that at least one processor is able to carry out as described in any in claim 1 to 7 performs
Method.
9. a kind of computer-readable recording medium, is stored with computer program, it is characterised in that the computer program is processed
Device realizes that the timed task any one of claim 1 to 7 performs method when performing.
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| CN110968405A (en) * | 2018-09-30 | 2020-04-07 | 杭州海康威视系统技术有限公司 | Method and device for detecting planned tasks |
| WO2023160608A1 (en) * | 2022-02-23 | 2023-08-31 | 达闼机器人股份有限公司 | Robot control method and apparatus, and storage medium and robot cluster |
| WO2023193560A1 (en) * | 2022-04-08 | 2023-10-12 | 海信视像科技股份有限公司 | Display device, and processing method for display device |
| CN116999024A (en) * | 2023-05-26 | 2023-11-07 | 荣耀终端有限公司 | Physiological parameter detection method, electronic device, storage medium, and program product |
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| US20050120258A1 (en) * | 2003-11-28 | 2005-06-02 | Takeshi Sohda | Synchronization method, computer system and program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110968405A (en) * | 2018-09-30 | 2020-04-07 | 杭州海康威视系统技术有限公司 | Method and device for detecting planned tasks |
| WO2023160608A1 (en) * | 2022-02-23 | 2023-08-31 | 达闼机器人股份有限公司 | Robot control method and apparatus, and storage medium and robot cluster |
| WO2023193560A1 (en) * | 2022-04-08 | 2023-10-12 | 海信视像科技股份有限公司 | Display device, and processing method for display device |
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Application publication date: 20180209 |