JPH113250A - Thread information collection method and recording medium recorded with thread information collection program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily collect the information on the thread switching operations by collecting the information on the thread states via one or both of the calling of a function and its return. SOLUTION: A function B is called at time T1 for a function A, and a thread information collection program 12 is called. When the next function X is called, a function Y is called at time T2 and then the program 12 is called. In such cases, the program 12 acquires a thread ID to identify the thread at time T2. Then the thread ID acquired at time T2 is compared with the thread ID stored at time T1. Thus, it's decided whether the threads are switched or not. If the threads are switched, this fact is recorded as the trace data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread system for collecting information related to a thread switching operation in a computer system in which a plurality of threads, each of which is a minimum unit to which a CPU can be assigned, are executed. The present invention relates to a method and a recording medium on which a thread information collection program is recorded.

[0002]

2. Description of the Related Art Conventionally, in a computer system that executes a program by multi-threading, a thread state is collected by collecting thread state information in a system program as described in Japanese Patent Application Laid-Open No. 63-211031. To be provided, or as disclosed in
As described in Japanese Unexamined Patent Publication No. 643/643, the state information of a thread is obtained by using a function unique to an operating system. This is realized by incorporating a dedicated interface between the two, that is, by using a function specialized for the operating system or adding a modification.

[0003]

However, in the above-mentioned conventional technology, an operating system or the like, which is an execution environment of a target program, for collecting thread information has a function of notifying a thread switching operation. There is a problem that if such a function is not provided, it is necessary to modify the operating system to provide the function.

An object of the present invention is to provide a computer system that executes a program by multi-threading without using a function specialized for an operating system, which is an execution environment of the program, and without modifying the operating system. Another object of the present invention is to provide a thread information collecting method capable of collecting information on a thread switching operation and a recording medium storing a thread information collecting program.

[0005]

A first thread information collecting method according to the present invention is directed to a function call or a return from a function call in a multithread program including a portion executed by any one of a plurality of threads. Alternatively, the information about the state of the thread in which the multi-thread program is being executed is collected at the timing of both.

A second thread information collecting method according to the present invention comprises:
Obtain an identifier of a thread in which the multi-thread program is being executed, triggered by a function call or a return from a function call or both in a multi-thread program including a portion executed by any one of a plurality of threads If the acquired thread identifier is different from the previously recorded thread identifier, information on the state of the thread is recorded as trace data, and the acquired thread identifier is recorded.

[0007] A third thread information collecting method of the present invention comprises:
In the first and second thread information collecting methods, a function call or a return from the function call in the multithread program is detected by executing a specific program prepared in advance.

[0008] A fourth thread information collecting method of the present invention comprises:
Triggered by execution of a thread information collection instruction described in a multi-thread program composed of a part executed by any one of a plurality of threads, information about a state of a thread in which the multi-thread program is being executed is collected. It is characterized by doing.

A fifth thread information collecting method according to the present invention comprises:
Triggered by execution of a thread information collection instruction described in a multi-thread program including a portion executed by any one of the plurality of threads, an identifier of a thread in which the multi-thread program is being executed is acquired, If the acquired thread identifier is different from the previously recorded thread identifier, information on the thread state is recorded as trace data, and the acquired thread identifier is recorded.

[0010] The first recording medium of the present invention is characterized in that a function call and / or a return from a function call in a multi-thread program composed of a portion executed by any one of a plurality of threads is used as a trigger. It records a program that causes a computer to execute a process of collecting information on the state of a thread in which a multi-thread program is being executed.

[0011] The second recording medium of the present invention is characterized in that a function call or a return from a function call or both of them is triggered by a multi-thread program composed of a portion executed by any one of a plurality of threads. Acquiring the identifier of the thread in which the multi-thread program is being executed, and if the acquired identifier of the thread is different from the identifier of the previously recorded thread, records information on the state of the thread as trace data; And a program for causing a computer to execute a process of recording the identifier of the computer.

A third recording medium according to the present invention, in the first and second recording media, detects a function call or a return from the function call in the multithread program by executing a specific program prepared in advance. A program that causes a computer to execute the processing to be performed is stored.

A fourth recording medium according to the present invention is characterized in that the multi-thread program is executed by executing a thread information collection instruction described in a multi-thread program including a portion executed by any one of a plurality of threads. It records a program that causes a computer to execute a process of collecting information on the state of a thread in which the program is being executed.

A fifth recording medium according to the present invention is characterized in that the multi-thread program is executed by executing a thread information collection instruction described in a multi-thread program including a portion executed by any one of a plurality of threads. Acquiring the identifier of the thread in which the program is being executed, and if the acquired identifier of the thread is different from the identifier of the previously recorded thread, records information on the state of the thread as trace data; And a program for causing a computer to execute a process of recording the information.

[0015]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, an environment to which the first embodiment of the present invention is applied includes a program to be executed by multi-threads (hereinafter referred to as a “multi-thread program”) 1 and a multi-thread program. Program 1
And a thread information collection program 2 for monitoring the execution of the program and creating the trace data 3.

In FIG. 2, reference numeral 11 denotes a part of the structure of the multi-thread program 1, and reference numeral 12 denotes a thread information collection program. However, when thread information is collected, the thread information collection program 12
Then, the process proceeds from the thread information collection program 12 to the multi-thread program 11 as shown by 15.

More specifically, in the function A,
When a function call is made to the function B at time T1 and the thread information collection program 12 is called, and as a next function call, a function call to the function Y is made at time T2 and the thread information collection program 12 is called at function T The thread information collection program 12 at time T2 performs the processing shown in the flowchart of FIG. That is, first, the thread information collection program 12 acquires a thread ID for identifying the thread at the time T2 (step S1). This thread ID is obtained by
The present invention is realized by using information prepared in an execution environment in which a plurality of threads exist, to which the present invention is applied. By comparing the thread ID at the time T2 with the thread ID stored at the time T1, it is determined whether or not the thread has been switched (step S2). (Step S3). In this embodiment, the trace data only needs to include at least the trace collection time, the thread ID before switching, and the thread ID after switching. However, the execution position of the program when the thread is switched, Information such as the running time of the thread may be collected. Also,
Thread ID for identifying the thread at time T2
Is stored in preparation for the determination of the next thread switching (step S4).

Here, the method of calling the thread information collection program 12 in response to a function call has been described. It is also possible.

Next, a modification of this embodiment will be described in detail with reference to the drawings.

Referring to FIG. 4, in this modification, in addition to the multi-thread program 21 and the thread information collecting program 22, the execution environment of the multi-thread program 21 is "Just In Time Compile".
r "(Java (United States Sun Micro
osystems Inc. (Trademark or registered trademark)), an intermediate language is translated into a machine language at the time of execution, and thereafter the converted machine language is executed to realize a high-speed execution. A prepared “routine called at the time of function call” 23 is included. The “routine called at the time of calling the function” 23 is “Just InTime Co.
In the case of a routine prepared for “compiler”, the processing for “Just In Time Compiler” is also implemented in “routine called at the time of function call” 23.

In this case, the call of the function B in the function A is normally performed by shifting to the "routine called at the time of calling the function" 23 at 24 and shifting to the head of the function B at 25. If you do
The "routine called at the time of calling the function" 23 to 26 calls the thread information collection program 22 to perform processing for collecting thread information, and then performs the transition to the original processing at 27.

In this modification, "Just In
The method for calling the thread information collection program 22 in response to a function call using the routine prepared for the “Time Compiler” has been described. If the thread information collection program 22 is called from a routine, it is also possible to collect thread information upon return of a function call or both of a function call and its return. Also, "Just
If the execution environment includes not only the routine prepared for “In Time Compiler” but also a routine called at the time of function call, the thread information collection program 22 can be called without changing the execution environment itself. By using such a routine, similar sampling can be performed.

In the first embodiment of the present invention, a function call or a function call in a multithread program is performed by calling a thread information collection program from a routine called when a function is called or returned from the function call in the multithread program. By collecting thread information in response to returning from or both, it is possible to use functions specific to the operating system that is the execution environment of the multi-thread program, and to modify the operating system In addition, there is an effect that information on thread switching operation can be collected.

Further, a second embodiment of the present invention is shown in FIG.
As shown in FIG. 5, an instruction 33 for calling a thread information collection program 32 is described in a multi-thread program 31 in an environment similar to that shown in FIG. By inserting this instruction 33 directly before the function call from the function A to the function B in the program,
Immediately before the processing shifts from the function A to the beginning of the function B in 34, the thread information collection program 32 is called in 35,
After performing the process for collecting thread information, the process returns to the function A at 36, and then the process is shifted to the beginning of the function B at 34.

In this embodiment, the method of inserting an instruction for calling the thread information collection program 32 immediately before a function call in a program is described. However, immediately after the return of the function call, or immediately before the function call and its return. It is also possible to collect the thread information by inserting an instruction that calls the thread information collecting program 32 immediately after the instruction.
In addition, the insertion of the code in the present embodiment includes insertion into a source program, an execution program or intermediate code, and the like.
The form of the program to be inserted does not matter.

According to the second embodiment of the present invention, an instruction for calling a thread information collection program is inserted immediately before a function call in a multithread program, immediately after a return from a function call, or both. Even if a routine that is called when a function is called or returned from a function call in a multi-threaded program is not prepared, it is possible to use a function that is specific to the operating system that is the execution environment of the multi-threaded program, or to modify the operating system. This has the effect that the information of the thread switching operation can be collected without performing it.

Still referring to FIG. 6, the third embodiment of the present invention
The embodiment has a recording medium 4 on which a thread information collection program 42 is recorded. The recording medium 4 may be a magnetic disk, a semiconductor memory, or another recording medium.

The thread information collection program 42 is read from the recording medium 4, and performs the same processing as the thread information collection program 2 in the first embodiment.

In the third embodiment of the present invention, a function call in a multi-thread program and / or a return from the function call are triggered, or a function call in a multi-thread program or a return from the function call or Since thread information is collected immediately before both, thread switching can be performed without using functions specific to the operating system, which is the execution environment of the multi-thread program, and without modifying the operating system. This has the effect that operation information can be collected.

[0031]

According to the present invention, information on a thread switching operation is collected without using a function specialized for an operating system which is an execution environment of a multi-thread program and without modifying the operating system. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an environment to which first and second embodiments of the present invention are applied;

FIG. 2 is a diagram illustrating an example of a mechanism for collecting thread information according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of a thread information collection program according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a mechanism for collecting thread information according to a modification of the first embodiment of the present invention;

FIG. 5 is a diagram illustrating an example of a mechanism for collecting thread information according to a second embodiment of the present invention.

FIG. 6 is a diagram illustrating an environment to which a third embodiment of the present invention is applied;

[Explanation of symbols]

1, 11, 21, 31, 41 Multithread program 2, 12, 22, 32, 42 Thread information collection program 3 Trace data

Claims (10)

[Claims] A multi-thread program is executed by a function call, a return from a function call, or both in a multi-thread program consisting of a part executed by any one of a plurality of threads. A method for collecting thread information, comprising collecting information on a thread state. 2. The multi-thread program is executed by a function call in a multi-thread program including a portion executed by any one of a plurality of threads, a return from a function call, or both. Acquiring an identifier of the thread, if the acquired identifier of the thread is different from the identifier of the previously recorded thread, records information on the state of the thread as trace data, and further records the identifier of the acquired thread. Method of collecting thread information. 3. The method according to claim 1, wherein a function call or a return from the function call in the multi-thread program is detected by executing a specific program prepared in advance. 4. An execution of a thread information collection instruction described in a multi-thread program including a portion executed by any one of a plurality of threads triggers the execution of the thread in which the multi-thread program is executed. A method for collecting thread information, comprising collecting information on a state. 5. An execution of a thread information collection instruction described in a multi-thread program composed of a part executed by any one of a plurality of threads triggers the execution of the thread in which the multi-thread program is being executed. Acquiring an identifier, if the acquired identifier of the thread is different from the previously recorded thread identifier, records information relating to the state of the thread as trace data, and further records the acquired identifier of the thread. Thread information collection method. 6. A multi-thread program which is executed by a function call, a return from a function call, or both in a multi-thread program including a portion executed by any one of a plurality of threads. A recording medium on which a program for causing a computer to execute a process of collecting information on a thread state is recorded. 7. The multi-thread program is executed by a function call in a multi-thread program including a portion executed by any one of a plurality of threads, a return from the function call, or both. A process of acquiring an identifier of the thread, recording the information on the state of the thread as trace data if the acquired identifier of the thread is different from the identifier of the previously recorded thread, and further recording the acquired identifier of the thread. A recording medium having recorded thereon a program to be executed. 8. A program for causing a computer to execute a process of detecting a function call or a return from the function call in the multi-thread program by executing a specific program prepared in advance. Or the recording medium according to 7. 9. Triggered by execution of a thread information collection instruction described in a multi-thread program including a portion executed by any one of a plurality of threads, the thread in which the multi-thread program is executed is executed. A recording medium on which a program for causing a computer to execute a process of collecting information on a state is recorded. 10. Triggered by execution of a thread information collection instruction described in a multi-thread program including a portion executed by any one of a plurality of threads, the thread in which the multi-thread program is being executed is executed. If the identifier of the acquired thread is different from the identifier of the previously recorded thread, information on the state of the thread is recorded as trace data, and the process of recording the acquired identifier of the thread is executed on the computer. A recording medium characterized by recording a program for causing a program to be executed.