JPH05346861A - Inspector for multitasking software - Google Patents

Abstract

PURPOSE:To improve efficiency of analyzing/designing a multi-tasking software. CONSTITUTION:A detection part 3 detects the switching of a scheduler 2 for switching and controlling plural tasks of a multitask program in a multitasking system 1. A storage part 4 stores switching data detected by the detection part 3, and an inspection part 5 inspects whether the executing operation of the multitask program satisfies a specification or not by comparing/collating the switching data stored in the storage part 4 with the specification data of time limitation or the like inputted from an input part 7. An output part 6 outputs the detected result of the detection part 3 and the inspected result of the inspection part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multitasking software inspection device for inspecting a switching control operation by a scheduler when a multitask program is executed.

[0002]

2. Description of the Related Art Generally, in software that requires real-time processing, the software is implemented as one scheduler and a set of a plurality of tasks. This scheduler switches execution of a plurality of tasks when a request is generated or in a time-sharing manner, as if the plurality of tasks are concurrently executed in parallel. This method of switching execution of a plurality of tasks is called scheduling.

Therefore, in software that requires real-time processing, the execution method of the software will be greatly affected by the scheduling method.

For this reason, how scheduling is executed is clearly indicated, and it is important to make an explicit check to improve the execution performance of software.

However, when the above-mentioned software requiring real-time processing is executed and control switching frequently occurs between a plurality of tasks and a scheduler, it is difficult to grasp the switching control operation, that is, scheduling. Met.

Up to now, how the scheduling is performed, whether the task is activated according to specifications such as the cycle of task activation and the time required for processing after occurrence of a certain event, or It was difficult to understand where an error was against the specifications and when the error occurred.

There is also no device for easily grasping the scheduling.

[0008]

As described above, in the conventional inspection device of multitasking software for inspecting a switching control operation for executing a multitask program having a plurality of tasks in parallel by a scheduler, the switching control is performed. How the operation is performed,
Since it was difficult to easily understand when the product is operating according to the specifications, or the operation that violates the specifications, that is, when an error occurs, the efficiency of analysis / design of multi-tasking software decreases. There was a problem to do.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a multitasking software inspection apparatus capable of eliminating such problems and improving the efficiency of analysis / design of multitasking software.

[0010]

According to the present invention, there is provided a multitasking software inspection device for inspecting a switching control operation for causing a scheduler to execute a multitasking program having a plurality of tasks in parallel. A detection unit that detects switching, a storage unit that stores the switching data detected by the detection unit,
An inspection unit that compares and collates the switching data stored in the storage unit with the input specification data relating to the switching control to inspect whether the execution operation of the multitask program satisfies the specifications, and the detection unit. And an output unit for outputting the detection result of 1. and the inspection result of the inspection unit.

[0011]

According to the present invention, in a multitasking software inspection device for inspecting a switching control operation in which a multitasking program having a plurality of tasks is executed in parallel by a scheduler, a detection unit performs switching by the switching control of the scheduler. The storage unit stores the switching data detected by the detection unit, and the inspection unit compares and collates the switching data stored in the storage unit with the input specification data regarding the switching control. It is checked whether the execution operation of the multitask program satisfies the specifications, and the output unit outputs the detection result of the detection unit and the inspection result of the inspection unit.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the arrangement of a multitasking software inspection apparatus according to an embodiment of the present invention. In FIG. 1, the inspection device of the present multi-tasking software targets the execution operation of the multi-task programming and the scheduler 2 incorporated in the multi-tasking system 1 which is a system for executing a plurality of tasks simultaneously in parallel. The input from the input unit 7 is performed by the detection unit 3 that detects switching of the switching control by the scheduler 2 during execution of multitasking, the storage unit 4 that stores the switching data of the scheduler 2 that is detected by the detection unit 3, and the input unit 7. An inspection unit 5 that inspects whether or not the specifications at the time of multitask execution are compared by comparing and collating with the specification data regarding the switching control, and the switching data that is the detection result of the detection unit 3 and the inspection result of the inspection unit 5. An output unit 6 that outputs inspection data, and an input unit that inputs new data regarding switching based on the output result of the output unit 6 It consists of.

FIG. 2 is an inspection flowchart of the inspection device for multitasking software according to an embodiment of the present invention. The operation of the inspection apparatus of the present multitasking software will be described with reference to the flowchart of FIG.

First, in the multitasking system 1, a multitask program including a plurality of tasks is executed (step 21). Then, at the same time as the execution of the multi-task program, the detection unit 3 causes the scheduler 2 to
The switching by the switching control is detected (step 22). This detection is performed by switching all the control between tasks only through an instruction managed by the scheduler 2.
Detects switch data when this instruction is executed. Next, the switching data detected by the detection unit 3 is stored in the storage unit 4 (step 23). Then, from step 21 to step 23 every predetermined time or every predetermined data.
Repeat the operation of. As a result, a predetermined amount of switching data is stored in the storage unit 4.

Here, FIG. 3 is a diagram showing an example of the switching data stored in the storage unit 4. As shown in FIG. 3, the switching data is composed of the time, the switching destination, and the factor causing the switching for each switching by the switching control by the scheduler 2. Here, the unit of time is "ms", the switching destination "S" means the scheduler, and "T1" to "T3".
Each means a task. Also, the factor "E1"
Means outside the multitasking system. Such switching data is stored in the storage unit 4.

Next, the output section 6 produces a timing chart based on the switching data sent from the detection section 3.
Display (step 24). Then, in step 25, when the inspection is performed, the specification data regarding the switching control is input to the inspection part 5 from the input part 7 (step 26), and the inspection part 5 is stored in the specification data and the storage part 4. An inspection is performed to compare and collate with the switching data (step 2
7), the inspection result is sent to the output unit 6 as inspection data,
The output unit 6 displays the inspection result based on this inspection data (step 24). On the other hand, in step 25,
When it is determined that the inspection is not performed, this inspection process ends.

FIG. 4 is a diagram showing an example of a timing chart display displayed on the output unit 6. In the timing chart of FIG. 4, the horizontal axis shows time in "ms" units,
The vertical axis shows the scheduler and the execution unit of each task. For example, solid line 46 represents the execution of task "T1". A broken line 48 indicates switching. Further, a ∇ mark 43 indicates switching occurrence due to a factor from the system external E, and a Δ mark 44 indicates output to the system external E. Further, the triangle mark 45 indicates the switching factor at the time position, and the switching factor at the time position of the triangle mark 45 is shown in the rectangle 41. Therefore, it is indicated that the switching factor indicated by the Δ mark 45 in FIG. 4 is activated by the task “T1”. Further, the time constraint column shown in the rectangle 42 indicates the specification of the switching control, and the portion performing the switching contrary to this specification is displayed in the timing chart 40 as a mesh 47.

The specification data input from the input unit 7 is displayed as the "time constraint" of the rectangle 42 as described above. The "time constraint" shown in the rectangle 42 is
"Starting T1 cycle is within 4ms", but this is
It means the specification that "task T1 must be activated within a period of 4 ms". In addition, as the "time constraint", "input E1 start T1 2ms
Or more, that is, "it takes 2 ms or more from the input of external system E1 to the activation of T1", and "input E1 output E2 10ms
Or less, that is, "from the input of the system external E1 to the output of the system external E2 is 10 ms or less". That is, in this embodiment, it is possible to input a periodic time constraint and a time constraint between events. Of course, the specification data is not limited to the above time constraint.

In the present embodiment, the inspection by the inspection unit 5 is performed on the basis of the specification data input from the input unit 7. May be inspected.

As described above, according to the present embodiment, the execution status of the multitask program can be grasped easily and at a glance from the timing chart displayed on the output unit 7, and the portion that violates the specifications can be easily carried out. It is possible to detect and efficiently analyze / design multi-tasking software having real-time property.

[0022]

As described above, according to the present invention, in the multitask program inspection device for inspecting the switching control operation for executing the multitask program having a plurality of tasks in parallel by the scheduler, Detecting the switching by the switching control of the scheduler, the storage unit stores the switching data detected by the detection unit,
An inspection unit compares and collates the switching data stored in the storage unit with the input specification data relating to the switching control, and inspects whether the execution operation of the multitask program satisfies the specifications, and the output unit However, since the detection result of the detection unit and the inspection result of the inspection unit are output, it is necessary to display the execution status of the multitasking software, which requires real-time processing and is difficult to follow. It has the advantage that

Further, there is an advantage that it is possible to easily detect the inspection result of the part that violates the specifications against the time constraint such as timing.

Further, there is an advantage that problems of the multitasking software can be easily searched based on the inspection result.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an inspection apparatus for multitasking software according to an embodiment of the present invention.

FIG. 2 is an inspection flowchart of an inspection device for multitasking software according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of switching data stored in a storage unit 4.

FIG. 4 is a diagram showing an example of a timing chart display displayed on an output unit 6.

[Explanation of symbols]

 1 multi-tasking system 2 scheduler 3 inspection unit 4 recording unit 5 inspection unit 6 output unit 7 input unit

Claims (1)

[Claims] 1. A multitasking software inspection device for inspecting a switching control operation in which a scheduler executes a multitask program having a plurality of tasks in parallel, and a detection unit for detecting switching by the switching control of the scheduler. The storage unit that stores the switching data detected by the detection unit and the switching data stored in the storage unit are compared and collated with the input specification data relating to the switching control, and the execution operation of the multitask program is specified. An inspection device for multi-tasking software, comprising: an inspection unit that inspects whether or not the above is satisfied; and an output unit that outputs the detection result of the detection unit and the inspection result of the inspection unit.