JPH023829A - Program execution time measurement device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a program execution time measuring device used for analyzing the operation of an electronic computer.

BACKGROUND OF THE INVENTION In order to improve the performance of electronic computers, it is necessary to analyze the operation of the electronic computers. Program execution time is important for the performance of an electronic computer, and measurement of program execution time is necessary as one of the above-mentioned operational analyses. Conventional methods for measuring program execution time include methods using software and methods using additional hardware. These two methods will be explained.

First, in the software method, a program to be measured for execution time (hereinafter referred to as a measurement target program) is running under an execution time measurement program (hereinafter referred to as a measurement program). The measurement program measures the execution time of the measurement target program. Using this method, it is possible to flexibly measure the execution time of each subroutine.

Next, a method using hardware will be explained. One method is to set the start address and end address of the program to be measured on the hardware, monitor the address signal of the computer, and measure the time from the appearance of the measurement start address until the appearance of the measurement end address. There are methods that measure execution time by doing this. Another method is to embed instructions to indicate the start and end of measurement in the measurement target program, and use these instructions to control the clock circuit.
There is a method for measuring execution time.

Problems that the invention aims to solve However, the above method has the following problems.

In the following, problems will be explained separately for the software method and the hardware method.

First, with the software method, the execution time of the system management program cannot be measured because both the measurement program and the program to be measured run under the computer's system management program. Furthermore, when the execution time is measured, the execution of the program on the computer is switched from the measurement target program to the measurement program. Since time is measured in this manner, the shorter the measurement time, the greater the rate of measurement error. Furthermore, the execution time of programs closely related to computer hardware,
In other words, software cannot measure the execution time, which must be measured based on the state of signals on the computer bus, which cannot be known from software.

Next, in the method using hardware, the configuration of the measuring device is fixed, so flexible measurements such as using a combination of the state of the computer, the state of the program to be measured, etc. as timing conditions are not possible.

The present invention solves the above-mentioned problems, makes it possible to accurately measure the execution time of a system management program of an electronic computer, and the execution time of a program closely related to the hardware. It is an object of the present invention to provide a program execution time measurement device that can flexibly measure execution time using various states as measurement conditions.

Means for Solving the Problems The present invention solves the above problems by implementing hardware having the configuration described below.

The states of address signals and control signals of the computer can be set as conditions for measuring program execution time, and these conditions can be set in one-to-one correspondence with multiple memory circuits that output these conditions as timing condition signals. Inputs the time measurement condition signal, compares this input with the address signal/control signal of the computer, and outputs the comparison result as a condition match signal.The same number of comparison circuits as the above memory circuits are input, and all the condition match signals are input. The time control signal output based on this input is 1.
A timekeeping control circuit that can preset the correspondence between a condition matching signal as an input and a timekeeping control signal as an output; It is made up of circuits.

Function: The program execution time measuring device realized by the present invention monitors the conditions of the address signal and control signal of the electronic computer, and when the conditions match the conditions set in advance in the memory circuit, the timer circuit is controlled. Execution time is measured.

In this way, since the signal state of the computer is used as a condition for measuring the execution time, the execution time of the computer system management program can also be measured in the same way as other programs. For the same reason, the execution time of any program can be measured as long as the timing conditions can be expressed in terms of computer signals. Furthermore, since the timing circuit is controlled as soon as the timing conditions match the state of the computer signal, the execution time can be measured accurately.

Next, the flexibility of execution time measurement is achieved as follows. By providing a plurality of memory circuits, many time measurement conditions can be set. Further, in the time control circuit, it is set which time measurement circuit is to be controlled when which time measurement condition matches the address signal/control signal of the electronic computer. The timing conditions are compared with address signals and control signals of the electronic computer. When the timekeeping conditions match, the timekeeping circuit is controlled according to the settings of the timekeeping control circuit and the execution time is measured. By doing so, when any combination of the plurality of time measurement conditions is satisfied, the execution time can be measured using any time measurement circuit, and flexible measurement becomes possible.

Embodiment An embodiment of the present invention is shown in FIG. In order to simplify the explanation, this embodiment has three memory circuits of 11.12°13,
There are three comparison circuits, 21, 22, and 23, and a clock circuit, 41.
There are two cases of 42.

Here, with respect to a program starting from address a1, a case will be described in which the time t1 from the start of execution until the instruction at address a2 is executed and the execution time t2 of the section from address a2 to address a3 are measured. It is assumed that the clock circuit 41 measures tl and the clock circuit 42 measures t2. The memory circuits 11, 12.13 have addresses a1, a2, . The state of the address signal and control signal when executing the instruction in a3 is stored. This state corresponds to the timing condition signals B1, B2. It is output as B3.

When execution of the program is started, the address signal/control signal A matches the timing condition signal B1, so the comparison circuit 21 which receives these three signals as input makes the condition matching signal C1 valid. Program execution is at address a2
When the address signal/control signal A matches the timing condition signal B2, the condition matching signal C2 becomes valid. Similarly, when the program execution reaches address a3, the condition match signal C3 becomes valid. The timekeeping control circuit 31 is set to output timekeeping control signals D1, D2 as follows in response to the input of the condition matching signals C1, C2, C3 as described above. When the condition matching signal C1 becomes valid, the timekeeping control signal D1 is made valid and the timekeeping circuit 41 is instructed to start timekeeping. When the condition matching signal C2 becomes valid, the timing control signal D1 is disabled (and the timing circuit 41 finishes timing), and at the same time, the timing control signal D2 is enabled and the timing circuit 42 is instructed to start timing. When the signal C3 becomes valid, the timekeeping control signal D2 is disabled (and the timekeeping of the timekeeping circuit 42 ends. In this way, the execution time of the program can be measured. The timekeeping control circuit 31 described above
can be realized with the circuit configuration shown in FIG. Condition match signal C
1, C2, C3 and the time measurement control signals DI, D2, a memory is used to make it possible to set the correspondence between the clock control signals DI and D2. Also, the timing control signal D1. In order to hold the output of D2, an RS flip-flop is configured using a NOR gate. The memory address inputs include condition matching signals C1, C2, C3 and a timekeeping control signal DI.

D2 is input. The reason why the timekeeping control signals DI and D2 are input is to use the state of the timekeeping circuit 41.42, that is, whether or not time is being counted, for controlling the timekeeping circuit 41.42. The data output of the memory is input to the RS flip-flop. In order to cause the timekeeping control circuit 31 to perform the above-mentioned measurement operation, the contents of Table 1 may be stored in the circuit memory shown in FIG. 2.

The circuits shown in Table 1 and Figure 2 are positive logic, and a signal is valid if the signal level is "1". In addition, the timing circuit is
Time is measured only while the level of the time control signal is "1". Here, the operation of the time measurement control circuit 31 shown in FIG. 2 will be explained. When the execution of the program starts, the address signal/control signal A shown in FIG. 1 and the timing condition signal B1 match, and the condition matching signal C1 becomes valid ("1"). At this time, since the clock circuits 41 and 42 are not measuring time, the clock control signals Di and D2 are not valid ("0"). Therefore, the circuit memory in FIG. 2 has C1=1 . C2=O,
C3=O, D1=O, D2=O.

is input. From the above table, R1=O for data output.

51=L, R2=1. S2 tonnage 0 is output, and as a result,
The timing control signal is D1=1. D2=0, and the clock circuit 4
1 starts timing. When the execution of the program reaches address a2, the condition match signal C2 becomes valid, and the clock circuit 41 is measuring time, that is, the clock control signal D
1 is valid. Therefore, the memory address inputs in FIG. 2 include CI=O, C2=1. C3=O, Dl=
1°D2=0 is input, R1=1°51=O, R2=O, 52=1 is obtained as the data output, and as a result, the clock control signal becomes DI=1, 52=1, and the clock circuit 41 The time measurement ends, and the time measurement by the time measurement circuit 42 starts. When the program execution reaches address a3, C1=O,C
2=O, C3=1° D1=O, D2=1, and as a result, D 1 =0° D2=O and the clock circuit is 41.4
2 completes time measurement, and the time measurement circuit 41 records the execution time t1 from address a1 to address a2 of the program.
The clock circuit 42 obtains the execution time t2 from address a2 to address a3.

As explained above, a program execution time measurement device having the configuration shown in FIG.
, C3 and the time measurement control signals D1 and D2, it is possible to flexibly measure the execution time of various states during program execution.

Note that although the timekeeping control circuit in FIG. 2 is constructed using a memory, other programmable elements or circuits may also be used, and the circuit scale can be made smaller than when using a memory. In addition, in Figure 1, there are three memory circuits and three comparison circuits, and two clock circuits, but the number of memory circuits and comparison circuits can be two or more, and the number of clock circuits can be one or more. . By increasing the number of memory circuits and comparison circuits, complex timekeeping conditions can be set, and the number of timekeeping circuits (
This allows you to measure various execution times at once.

Effects of the Invention The present invention provides two or more memory circuits that can set the states of address signals and control signals of an electronic computer as conditions for measuring program execution time, and output these conditions as timing condition signals, and a timing condition signal. A plurality of comparison circuits are provided in one-to-one correspondence with memory circuits, which compare one of the two with the address signal/control signal of the computer and output the comparison result as a condition matching signal, and all the condition matching signals. A timing control circuit which has one or more timing control signals output based on the input and which can set the relationship between the input and the output based on the input in advance; It is composed of as many clock circuits as there are clock control signals that measure time according to the input.

By adopting the above configuration, the problem is solved as follows. The state of the address signal and control signal of the computer is monitored, and when the state matches a condition set in advance in the memory circuit, the timer circuit is controlled and the execution time is measured. As a result, the execution time of any program can be measured as long as the timing conditions can be expressed in the state of the address signal and control signal of the electronic computer.

Furthermore, since the timing circuit is controlled at the same time as the timing conditions match, the execution time can be measured accurately. In addition, multiple memory circuits are provided so that multiple timing conditions can be set, and these conditions are compared with the address signal and control signal of the computer in a comparison circuit, and those that match among the multiple timing conditions are sent to the timing control circuit. If it is set, the clock circuit is controlled and the execution time is measured.For this reason, it is possible to set complicated timing conditions, and flexible measurement is realized.

As described above, according to the present invention, it is possible to obtain a program execution time measuring device that can accurately measure the execution time of all kinds of programs with flexible condition settings.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a program execution time measuring device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of an implementation example of a time control circuit of the same device. 11.12.13...Memory circuit, 21.22゜23...Comparison circuit, 31...Time control circuit, 41゜42...Time measurement circuit , A...
-Address signal/control signal, B1. B2. B3...
...Timekeeping condition signal, CI. C2, C3... Condition match signal, Di, B2...
...Time control signal. Name of agent: Patent attorney Toshio Nakao and one other person --
, -Ninichi, Confucianism- εxinxinG33Qko

Claims (1)

[Claims] The state of the address signal and control signal of the computer that executes the program whose execution time is to be measured can be set as a timing condition that indicates the start and end timing of measuring the program execution time, and the above timing conditions can be set as the timing condition signal. A plurality of memory circuits to output, the above-mentioned time measurement condition signal, and the address signal/control signal of the above-mentioned computer are input, and the above-mentioned 2.
A plurality of comparison circuits are provided in one-to-one correspondence with the storage circuits, and the condition matching signals outputted from the plurality of storage circuits are all input. , a timekeeping control circuit having one or more timekeeping control signals output based on the input, and capable of setting in advance the correspondence of the timekeeping control signal to the condition matching signal, that is, the correspondence of the output to the input; 1 for one or more timekeeping control signals
The clock circuit is provided in one-to-one correspondence, and is equipped with a clock circuit that inputs a corresponding clock control signal and measures time only during the period when this input is valid, and within the clock conditions set in the memory circuit. . A program execution time measurement device capable of measuring the execution time of a program by instructing the time measurement circuit to start and end time measurement when a combination set in the time measurement control circuit is satisfied.