JPH0362136A - Measuring system for number of times of subroutine access - Google Patents

Abstract

PURPOSE:To realize simple measurement by registering exception so that it is caused in a CPU at the time of executing subroutine access, and controlling a measuring means through an exception processing means. CONSTITUTION:The exception is registered by an exception registering means 1 so that it is caused in the CPU 4 at the time of the executing the subroutine access. Then, the CPU 4 causes the exception in response to a subroutine access command from a program 7 to be measured, and simultaneously, it discontinues the execution of a subroutine access instruction, and delivers control of the exception processing means 5. Next, the control is delivered from the means 5 to the measuring means 2, and it is counted that the subroutine part 7-2 of the program 7 is accessed by a measurement table 8, and the control is returned to the means 5, and the execution of the instruction of the subroutine access is re-started in the CPU 4. Through this configuration, an object measuring program outputted from a usual complier can be used as it is, and the simultaneously, the program being applied actually need not be re-complied, and the number of times of the access can be simply measured.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for measuring the number of subroutine calls, and in particular, a method for measuring the number of calls of each subroutine, which is data necessary for improving the performance of a program to which subroutines are linked. Concerning a method for measuring the number of subroutine calls.

[Conventional technology]

When creating a program, one large program is created by dividing processing procedures into subroutines for each function or by using a general-purpose subroutine library.

When improving the performance of these programs, performance is often improved by measuring the number of times each subroutine is called and reviewing the processing for subroutines that are called a large number of times.

The conventional method for measuring the number of subroutine calls first provides a compiler with an option to create an object that calls a means for measuring the number of subroutine calls. Then, the compiler determines whether or not the option for calling the subroutine call count measurement means is specified.
The object to be output is changed. Therefore, in the conventional method for measuring the number of subroutine calls, in order to measure the number of subroutine calls, a separate object is created and the object is executed to measure the number of subroutine calls.

[Problem to be solved by the invention]

The conventional subroutine call count measurement method described above is
Since the procedure that calls the process for measuring the number of subroutine calls is output for each subroutine when compiling, you can use that subroutine during testing, but if you use it as is in the actual program, it will call the method for measuring the number of subroutine calls. This has the disadvantage that the amount of time required is overhead and performance is degraded.

In addition, the conventional method for measuring the number of subroutine calls has the disadvantage that it is not possible to measure the number of subroutine calls when a program is linked with a subroutine that does not call a means for measuring the number of subroutine calls. have.

[Means to solve the problem]

The subroutine call count measuring method of the present invention measures the number of calls to each subroutine of a program in which subroutines are linked, and includes: a central processing unit that can be set to cause an exception to occur when a subroutine call instruction is executed; an exception handling means for executing a pre-registered exception handling procedure when an exception occurs in the central processing unit; a measuring means for measuring the number of times each subroutine is called; exception registration means for registering in the exception handling means as an exception handling procedure and setting the central processing unit to generate an exception when a subroutine call instruction is executed; If occurrence is set in the exception registration means, the central processing unit passes control to the exception handling means when executing a subroutine call instruction, the exception handling means passes control to the measuring means, and the exception handling means passes control to the measuring means, and the exception handling means passes control to the measuring means. The central processing unit resumes calling the subroutine after completing the measurement process.

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of the method for measuring the number of subroutine calls of the present invention.

1 is an exception registration means, 2 is a measurement means, 3 is an editing processing section, 4
5 is a central processing unit, 5 is an exception handling means, 6 is a measurement result output unit, 7 is a program to be measured, 7-1 is a main part of the program to be measured 7, 7-2 is a subroutine part of the program to be measured 7, and 8 is a subroutine part of the program to be measured 7. This is a measurement table.

When measuring the number of subroutine calls, the exception registration means 1 registers the measurement means 2 as an exception handling procedure when the subroutine call instruction is executed in the exception handling means 5, and at the same time, the exception registration means 1 registers the measurement means 2 as an exception handling procedure when the subroutine call instruction is executed in the exception handling means 5, and at the same time, Set so that an exception occurs (S-1)
, transfers control to the program under test 7 (S-2).

Therefore, in the program under test 7, the program under test 7
The main part 7-1 of is executed (s-3, 5-4), and CALL SUB, which is a subroutine call command of the subroutine part 7-2 of the program under test 7, is executed (s-3, 5-4).
S-5). A subroutine call instruction is sent to the central processing unit 4.
(S-6), since the setting is such that an exception occurs when the subroutine call instruction is executed, the central processing unit 4 interrupts the execution of the subroutine call instruction and gives control to the exception handling means 5. Hand it over (S-7).

The exception handling means 5 then passes control to the measuring means 2, which is an exception handling procedure (S-8). The measurement means 2 stores the subroutine part 7-2 of the program to be measured 7 in the measurement table 8.
is counted (S-16), and returns control to the exception handling means 5 (S-9). Therefore, the exception handling means 5 causes the central processing unit 4 to resume execution of the subroutine call instruction (S-10).

Therefore, the central processing unit 4 resumes from the interruption point of the subroutine call instruction and calls the subroutine portion 7-2 of the program under test 7 (S-11).

Thereafter, when the processing of the subroutine section 7-2 of the program under test 7 is completed, the main section 7-1 of the program under test 7
Control is returned to (S-12).

Furthermore, when the processing of the main section 7-1 of the program under test 7 is completed (S-13), the editing processing section 3 is called (
S-14). Then, the measurement result of the number of subroutine calls edited by the editing processing unit 3 is outputted by the measurement result output unit 6 (S-15).

〔Effect of the invention〕

As explained above, the method for measuring the number of subroutine calls of the present invention uses the object measurement program output by a normal compiler as is because it is determined whether or not to measure the number of subroutine calls when a subroutine call instruction is executed. It has the effect of being able to

Therefore, the method for measuring the number of subroutine calls of the present invention has the effect that it is possible to easily measure the number of subroutine calls even for programs that are actually in use, by simply setting the execution environment without recompiling. are doing.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the method for measuring the number of subroutine calls of the present invention. DESCRIPTION OF SYMBOLS 1... Exception registration means, 2... Measurement means, 3... Editing processing section, 4... Central processing unit, 5... Exception processing means, 6... Measurement result output section, 7. ...Program to be measured, 7-1... Main part, 7-2... Subroutine part, 8... Measurement table.

Claims (1)

[Claims] In a subroutine call count measurement method that measures the number of calls to each subroutine in a program in which subroutines are linked, there is provided a central processing unit that can be set to generate an exception when a subroutine call instruction is executed, and when an exception occurs in the central processing unit. an exception handling means for executing an exception handling procedure registered in advance in the exception handling means; a measuring means for measuring the number of times each subroutine is called; and registering the measuring means in the exception handling means as an exception handling procedure at the time of execution of a subroutine call instruction. and an exception registration means for setting the central processing unit so that an exception occurs when a subroutine call instruction is executed, and the exception registration means is configured to set the occurrence of an exception when the subroutine call instruction is executed. When the central processing unit executes a subroutine call instruction, the central processing unit passes control to the exception handling means, the exception handling means passes control to the measurement means, ends the measurement processing by the measurement means, and returns the control to the central processing unit. A method for measuring the number of subroutine calls, characterized in that the device restarts subroutine calls.