CN101944056B - Method and device for monitoring multitask system - Google Patents
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Abstract
The embodiment of the invention discloses a method and device for monitoring a multitask system, which is used for improving the monitoring efficiency of the multitask system. The method comprises the following steps: setting task start flag registers and task execution flag registers, setting task start flag bits and task execution flag bits for all the tasks in the registers, when the tasks are started, setting the same flag bits for the task start flag registers and the task execution flag registers, in the process of executing main tasks, obtaining the flag bits of the task start flag registers and the flag bits of the task execution flag registers, judging whether the flag bits of the two kinds of registers are the same, if so, clearing the task counter and simultaneously clearing and resetting the task execution flag registers, and if not, resetting the system. Therefore, the operation conditions of all the tasks can be known and whether the system needs to be reset can be determined by only judging once each time, thus improving the judging efficiency.
Description
Technical Field
The invention relates to the field of computers, in particular to a method and a device for monitoring a multitask system.
Background
The Watchdog (WDT, Watchdog Timer) is divided into a hardware Watchdog and a software Watchdog, the hardware Watchdog utilizes a Timer circuit, the timing output of the hardware Watchdog is connected to the reset end of the circuit, the counter of the Watchdog is started after the system runs, the Watchdog starts to count automatically, the program resets the Timer in the timing period, therefore, when the program works normally, the Timer can not overflow, the reset signal can not be generated, if the program fails, the Watchdog can not reset in the timing period, the Watchdog Timer overflows to generate the reset signal and restart the system, the software Watchdog is the same in principle, only the Timer on the hardware circuit is replaced by the internal Timer of the processor, the working principle of the Watchdog in the single task system is as above, the Watchdog is easy to realize, the situation is more complex in the multi-task system, as long as one task works normally and the Timer is reset periodically, the watchdog timer will not overflow unless all tasks fail, and the watchdog timer will not overflow to generate a reset signal and restart the system.
In order to solve the problem of monitoring of the multi-task system in the prior art, a watchdog counter which is simulated by software is set for each task, then the feeding condition of each software watchdog is regularly inquired, whether a feeding instruction is called or not is determined, the watchdog counter is cleared, if any software watchdog overflows, the feeding is stopped, and the system is reset.
According to the technical scheme, the watchdog counter of each task needs to be judged, whether the running conditions of all tasks in the system are normal can be judged, and the monitoring efficiency of the multi-task system is reduced.
Disclosure of Invention
The embodiment of the invention provides a method and a device for monitoring a multitask system, which can improve the monitoring efficiency of the multitask system.
The multitask system monitoring method provided by the embodiment of the invention comprises the following steps: setting a task starting flag register and a task execution flag register; setting the task starting flag register and the task execution flag register to enable the initial flag bit of the task starting flag register to be the same as the initial flag bit of the task execution flag register; when a main task is executed, acquiring a zone bit of the task starting zone register and a zone bit of the task execution zone register; and judging whether the flag bit of the task starting flag register is the same as the flag bit of the task execution flag register, if so, clearing the task counter, clearing and resetting the task execution flag register, and if not, resetting the system.
The multitask system monitoring device provided by the embodiment of the invention comprises: the setting unit is used for setting a task starting flag register and a task execution flag register; the setting unit is used for setting the task starting flag register and the task execution flag register so that the initial flag bit of the task starting flag register is the same as the initial flag bit of the task execution flag register; the acquisition unit is used for acquiring the zone bit of the task starting zone register and the zone bit of the task execution zone register when a main task is executed; the judging unit is used for judging whether the zone bit of the task starting zone register is the same as the zone bit of the task execution zone register or not; the zero clearing unit is used for clearing the task counter and clearing the task execution flag register; and the resetting unit is used for resetting the system.
According to the technical scheme, the embodiment of the invention has the following advantages:
in the embodiment of the invention, in the monitoring of the multitask system, a task starting flag register and a task execution flag register are arranged in the multitask system, task starting flag bits and task execution flag bits are arranged in the registers for all tasks, when the tasks are started, the task starting flag register and the task execution flag register are provided with the same flag bits, when a main task is executed, the flag bits of the starting flag register and the flag bits of the task execution flag register are obtained, whether the flag bits are the same or not is judged, if the flag bits are the same, a task counter is cleared, the task execution flag register is reset and reset, and if the flag bits are different, the system is reset, so that the running condition of all the tasks can be known and whether the system needs to be reset or not can be determined only by judging once every time, the judgment time is reduced, and the judgment efficiency is.
Drawings
FIG. 1 is a diagram of an embodiment of a method for monitoring a multitasking system in accordance with the present invention;
FIG. 2 is a diagram of another embodiment of a method for monitoring a multitasking system in accordance with an embodiment of the present invention;
fig. 3 is a diagram illustrating an embodiment of a monitoring apparatus for a multitasking system according to the present invention.
Detailed Description
The embodiment of the invention provides a monitoring method of a multitask system, which is used for improving the monitoring efficiency of the multitask system, and also provides a monitoring device of the multitask system, which is respectively explained in detail below.
It should be noted that the method and apparatus provided in the embodiment of the present invention may be applied to a watchdog monitoring program of an embedded operating system, and may also be applied to all embedded Real-time systems (RTOS) that require a watchdog timer, and a specific application range is not limited herein.
Referring to fig. 1, a method for monitoring a multitask system according to an embodiment of the present invention includes:
101. setting a task starting flag register and a task execution flag register;
in the embodiment of the invention, in a multitask system, a task starting flag register and a task execution flag register are set, the two flag registers are global variable flag registers, preferably, a task starting flag register and a task execution flag register are set, system resources can be saved most, the task starting flag register is used for temporarily storing a starting flag instruction of a single task, and the task execution flag register is used for temporarily storing an execution instruction of the single task, for example, an instruction for clearing a watchdog counter, namely a dog feeding instruction.
It should be noted that the task execution flag register may be used to temporarily store an instruction for clearing the watchdog counter, or may be an execution instruction of other single task, where the type of the temporary storage instruction is related to an actual application process, and is not limited herein.
102. Setting a task starting flag register and a task execution flag register;
when any single task starts to run, the task start flag register and the task execution flag register are set, so that the initial flag bits of all the single tasks in the task start flag register are the same as the initial flag bits of all the single tasks in the task execution flag register, for example, the initial flag bits of all the single tasks in the task start flag register are set to 1, the initial flag bits of all the single tasks in the task execution flag register are also set to 1, and a specific setting process will be described in detail in the following embodiments.
103. Acquiring a zone bit of a task starting zone register and a zone bit of a task execution zone register;
in the main task execution process, flag bits of all the individual tasks in the task start flag register and flag bits of all the individual tasks in the task execution flag register can be obtained at regular time according to preset time, and the specific preset time is related to the actual application process and is not limited herein.
104. Judging whether the zone bit of the task starting zone register is the same as the zone bit of the task execution zone register;
For example, if the flag bits of all the individual tasks in the task start flag register are 1 and the flag bits of all the individual tasks in the task execution flag register are also 1, the determination result is that the flag bits of the task start flag register in the system are the same as the flag bits of the task execution flag register, and then step 105 is performed, and if the flag bits of all the individual tasks in the task start flag register are 1 and the flag bits of one or more individual tasks in the task execution flag register are 0, the determination result is that the flag bits of the individual tasks in the task start flag register are different from the flag bits of the individual tasks in the task execution flag register, and then step 106 is performed.
105. Clearing the task counter, clearing and resetting the task execution flag register;
if the determination result in step 104 is that the flag bit of the task start flag register is the same as the flag bit of the task execution flag register, it is determined that each individual task of the system is operating normally, the watchdog counter of the task can be cleared, the task execution flag register of each individual task is cleared, and then the task execution flag register of the individual task is reset, so that the flag bit of the task execution flag register of the individual task is the same as the flag bit of the task start flag register.
106. And resetting the system.
If the judgment result in the step 104 is that the flag bit of the task start flag register of one or more single tasks is different from the flag bit of the task execution flag register, it is determined that the system has a fault, the system is reset, and the system is restarted.
In the embodiment of the invention, when a multi-task system is monitored, a task starting flag register and a task execution flag register are set, task starting flag bits and task execution flag bits are set for all tasks in the registers, when the tasks are started, the task starting flag register and the task execution flag register are set to have the same flag bits, when a main task is executed, the flag bits of the starting flag register and the flag bits of the task execution flag register are obtained, whether the flag bits are the same or not is judged, if the flag bits are the same, a task counter is cleared, the task execution flag register is reset and reset, and if the flag bits are different, the system is reset, so that the running condition of all tasks can be known and whether the system needs to be reset or not can be determined only by judging once every time, the judgment time is shortened, and the judgment efficiency is.
Referring to fig. 2, another embodiment of the monitoring method for a multitask system in the embodiment of the present invention includes:
201. setting a task starting flag register and a task execution flag register;
in the embodiment of the present invention, the content of step 201 is the same as the content of step 101 shown in fig. 1, and is not described herein again.
202. Setting a starting flag register and a task execution flag register according to the task priority;
when a single task is started, a task starting flag register and a task execution flag register are set at a position corresponding to the priority of the single task, so that the initial flag bit of the task starting flag register is the same as the initial flag bit of the task execution flag register.
Specifically, each single task has its own priority, and if there are 6 tasks in the system, the priority of task 1 is 1, the priority of task 2 is 2, and so on, and the priority of task 6 is 6, then according to the respective priorities, the execution order of the 6 tasks is that task 1 is executed first, then task 2 is executed, and so on, and task 6 is executed last.
Further, a plurality of positions in the task start flag register may be used to set a flag bit of each individual task, and a plurality of positions in the task execution flag register may also be used to set a flag bit of each individual task, assuming that the task start flag register and the task execution flag register of task 5 are set, when task 5 is started, the flag bit corresponding to task 5 in the task start flag register is set, that is, the flag bit of the 5 th bit of the task start flag register is set to 1, and the flag bit of the 5 th bit of the task execution flag register is also set to 1, so that the setting of the task start flag register and the setting of the task execution flag register are the same, and it can be understood that the reset of the 5 th bit of the task execution flag register is also performed when the flag register is subsequently reset.
It should be noted that, if the priority of a single task is higher, when the priority is higher than the limit of the number of bits of the flag register or other unsuitable conditions, the adjustment can be performed according to the specific situation.
203-206 are the same as the steps 103-106 in the embodiment shown in FIG. 1, and are not repeated here.
207. Setting a task execution flag register at fixed time according to preset time;
specifically, the setting time is preset, the task execution flag register in a single task is cleared when the preset time is reached each time, and the task execution flag register is reset, so that the flag bit of the task execution flag register is the same as the flag bit of the start flag register in the single task.
It should be noted that the preset setting time may be set arbitrarily, but it is necessary to ensure that enough time is available within one cycle duration of the main task to set all the individual tasks, otherwise, if the preset time is too short, when the main task makes a judgment again, the individual task has not set the task execution flag register yet, resulting in an error in the result of the judgment of the main task on the flag bits of the two registers of the individual task.
For example, if there are 6 single tasks in the system, the timing setting time of each single task is 0.5 second, and the primary cycle time of the main task is 1.5 seconds, each single task can set the task execution flag register at least twice in the primary cycle process of the main task, so as to ensure that the flag bit of the task execution flag register is the same as the flag bit of the start flag register in the single task.
It should be further noted that the preset setting time may not be too short, and too frequent setting may cause waste of system resources.
208. Resetting or not setting the task starting flag register and the task execution flag register;
when a single task cannot be monitored by a watchdog and the watchdog monitoring of the single task needs to be prohibited, if the task start flag register and the task execution flag register of the single task are not set, the task start flag register and the task execution flag register are not set, and if the task start flag register and the task execution flag register of the single task are set, the task start flag register and the task execution flag register are cleared.
It should be noted that, prohibiting the single task from performing watchdog monitoring may be temporary, and then may recover the watchdog function, or may be permanent, and terminates the watchdog function, and the specific prohibition manner is related to the actual application, and is not limited herein.
209. And inquiring the single failed task and processing the single task.
When the flag bits of the task start flag register of a single task and the task execution flag register of the single task in the system are different, the single task with a fault can be inquired, and corresponding processing can be performed on the single task, such as finding a fault reason or restarting the single task.
It should be noted that, the specific manner of querying the failed single task may be implemented by the prior art, and is not limited herein.
In the embodiment of the invention, the start flag register and the task execution flag register are set according to the task priority, the register setting can be reduced, the system resource is saved, the task execution flag register is set at regular time according to the preset time, and the task execution flag register is reset, so that the task start flag register and the task execution flag register of a single task are correctly judged when the main task is judged again, the waste of the system resource caused by frequent setting is avoided, when a certain single task counter cannot be used as a watchdog to monitor the system, the watchdog monitoring of the single task is temporarily or permanently forbidden, and the operation of other parts of the system is not influenced.
Referring to fig. 3, a monitoring apparatus of a multitask system according to an embodiment of the present invention is described below, where the monitoring apparatus of the multitask system according to the embodiment of the present invention includes:
a setting unit 301, configured to set a task start flag register and a task execution flag register;
a setting unit 302, configured to set a task execution flag register, so that a flag bit of the task execution flag register is the same as a flag bit of the task start flag register;
an obtaining unit 303, configured to obtain a flag bit of the task start flag register and a flag bit of the task execution flag register when executing the main task;
a judging unit 304, configured to judge whether a flag bit of the task start flag register is the same as a flag bit of the task execution flag register;
a clearing unit 305, configured to clear the task counter and the task execution flag register, and if it is necessary to prohibit clearing the single task counter, clear the task start flag register and the task execution flag register of the single task when the task start flag register and the task execution flag register of the single task are set;
a reset unit 306 for resetting the system.
In this embodiment, the monitoring apparatus of the multitask system may further include:
a query unit 307, configured to query a single task that has a fault;
and the processing unit 308 is used for processing the single failed task.
For the sake of understanding, the following describes the relationship between the units of the monitoring apparatus of the multitask system in this embodiment with a specific application scenario:
first, the setting unit 301 sets a task start flag register and a task execution flag register of a global variable in a multitask system, the setting unit 302 sets the task start flag register and the task execution flag register so that an initial flag bit of the task start flag register is the same as an initial flag bit of the task execution flag register, and the setting unit 302 may set the task start flag register and the task execution flag register according to priority of each task.
It should be noted that the specific setting function performed by the setting unit 302 may be the same as that of step 202 in the embodiment shown in fig. 2, and is not described herein again.
When a main task starts to execute, an obtaining unit 303 obtains flag bits of all single tasks in a task start flag register in the task and flag bits of all single tasks in a task execution flag register at regular time, a judging unit 304 judges whether the two flag bits are the same, if the two flag bits are the same, each single task of the system is considered to be normally operated, a clearing unit 305 clears a watchdog counter and clears a task execution flag register, a setting unit 302 resets the task execution flag register, if the flag bits are different, the system is considered to have a fault, a resetting unit 306 resets the system, and the system is restarted.
In each single task, the task execution flag register of the failed single task needs to be reset, otherwise, when the main task judges again, the single task does not set the task execution flag register yet, so that the result of judging the flag bits of the two registers of the single task by the main task is wrong, firstly, the setting time is preset, and in each single task, each time the preset setting time is reached, the reset unit 305 resets the task execution flag register in the single task, and the setting unit 302 resets the task execution flag register, so as to ensure that the flag bit of the task execution flag register is the same as the flag bit of the start flag register in the single task.
It should be noted that the preset setting time can be set arbitrarily, but it is necessary to ensure that enough time is available within a cycle duration of the main task to set all the individual tasks, otherwise, if the preset time is too short, when the main task determines the individual tasks again, the individual tasks do not set the task execution flag registers yet, which results in an error in the result of the determination of the main task on the flag bits of the two registers of the individual tasks, and the preset setting time cannot be too short, so that the too frequent setting may cause waste of system resources.
Under special circumstances, when a single task counter cannot be used as a watchdog to monitor a system and the watchdog monitoring of the single task needs to be prohibited, if the task start flag register and the task execution flag register of the single task are not set, the task start flag register and the task execution flag register are not set, and if the task start flag register and the task execution flag register of the single task are set, the clear unit 305 clears the task start flag register and the task execution flag register.
It should be noted that, prohibiting the single task from performing watchdog monitoring may be temporary, and then may recover the watchdog function, or may be permanent, and terminates the watchdog function, and the specific prohibition manner is related to the actual application, and is not limited herein.
After the resetting unit 306 resets the system, the querying unit 307 may query the single task with the fault, and the processing unit 308 may perform corresponding processing on the single task, such as finding a fault cause or restarting the single task.
It should be noted that, the specific manner of querying the failed single task may be implemented by the prior art, and is not limited herein.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by hardware that is instructed to implement by a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
While the method and apparatus for monitoring a multitask system according to the present invention have been described in detail, those skilled in the art will appreciate that various modifications, additions, substitutions, and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (10)
1. A method for monitoring a multitask system, comprising:
setting a task starting flag register and a task execution flag register of a single task;
when any single task starts to run, setting the task starting flag register and the task execution flag register to enable the initial flag bit of the task starting flag register to be the same as the initial flag bit of the task execution flag register;
when a main task is executed, acquiring a zone bit of the task starting zone register and a zone bit of the task execution zone register;
and judging whether the flag bit of the task starting flag register is the same as the flag bit of the task execution flag register, if so, clearing the task counter, clearing and resetting the task execution flag register, and if not, resetting the system.
2. The method of claim 1, wherein setting the start flag register and the task execution flag register such that an initial flag bit of the task start flag register is the same as an initial flag bit of the task execution flag register comprises:
setting the task starting flag register and the task execution flag register at a position corresponding to the priority of a single task, so that the initial flag bit of the task starting flag register is the same as the initial flag bit of the task execution flag register.
3. The method of claim 1, wherein clearing the task counter, after clearing and resetting the task execution flag register, comprises:
and setting the task execution flag register at fixed time according to preset time to ensure that the flag bit of the task execution flag register is the same as the flag bit of the task starting flag register.
4. The method according to any one of claims 1 to 3, wherein if it is required to prohibit the clearing of the single task counter, when the task start flag register and the task execution flag register of the single task are not set, the task start flag register and the task execution flag register of the single task are not set;
or,
and when the task starting flag register and the task execution flag register of the single task are set, clearing the task starting flag register and the task execution flag register of the single task.
5. The method of claim 1, wherein resetting the system thereafter comprises:
and inquiring the single task with the fault, and processing the single task with the fault.
6. A multitask system monitoring device, comprising:
the setting unit is used for setting a task starting flag register and a task execution flag register of a single task;
the setting unit is used for setting the task starting flag register and the task execution flag register when any single task starts to run, so that the initial flag bit of the task starting flag register is the same as the initial flag bit of the task execution flag register;
the acquisition unit is used for acquiring the zone bit of the task starting zone register and the zone bit of the task execution zone register when a main task is executed;
the judging unit is used for judging whether the zone bit of the task starting zone register is the same as the zone bit of the task execution zone register or not;
the zero clearing unit is used for clearing the task counter and clearing the task execution flag register;
and the resetting unit is used for resetting the system.
7. The apparatus of claim 6,
the setting unit is further configured to set the task start flag register and the task execution flag register at a position corresponding to the priority of a single task, so that an initial flag bit of the task start flag register is the same as an initial flag bit of the task execution flag register.
8. The apparatus of claim 6,
the setting unit is further configured to set the task execution flag register at regular time according to preset time, so that the flag bit of the task execution flag register is the same as the flag bit of the task start flag register.
9. The apparatus according to any one of claims 6 to 8,
the clear unit is further configured to clear the task start flag register and the task execution flag register of the single task when the task start flag register and the task execution flag register of the single task are set if it is required to prohibit clearing the single task counter.
10. The apparatus of claim 6, wherein the multitask system monitoring means further comprises:
the query unit is used for querying the single task with the fault;
and the processing unit is used for processing the single task with the fault.
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| CN109839903B (en) * | 2017-11-27 | 2020-08-14 | 大族激光科技产业集团股份有限公司 | Multi-task online cutting control method and system and laser cutting equipment |
| CN112783624A (en) * | 2021-01-18 | 2021-05-11 | 广汽零部件有限公司 | Non-real-time scheduling system for automobile and task execution method |
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| CN1595368A (en) * | 2003-09-13 | 2005-03-16 | 华为技术有限公司 | Abnormal monitoring equipment and method for multi-task system |
| CN101165630A (en) * | 2006-10-19 | 2008-04-23 | 中兴通讯股份有限公司 | Combined type reset system processing method and device |
| CN101216798A (en) * | 2008-01-14 | 2008-07-09 | 浙江大学 | Periodic task reliability control method based on watchdog and timer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1595368A (en) * | 2003-09-13 | 2005-03-16 | 华为技术有限公司 | Abnormal monitoring equipment and method for multi-task system |
| CN101165630A (en) * | 2006-10-19 | 2008-04-23 | 中兴通讯股份有限公司 | Combined type reset system processing method and device |
| CN101216798A (en) * | 2008-01-14 | 2008-07-09 | 浙江大学 | Periodic task reliability control method based on watchdog and timer |
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| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518057 Nanshan District high tech Industrial Village, Guangdong, R2,, B5 Patentee after: Farad Electric Co., Ltd. Address before: 518057 Nanshan District high tech Industrial Village, Guangdong, R2,, B5 Patentee before: Shenzhen Hualite Electric Appliances Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20200921 |