JPS61294559A - Evaluation system for performance of computer - Google Patents

Abstract

PURPOSE:To estimate quickly the load amount of an evaluation system for performance of a computer by counting the CPU time used by a job and the physical input frequency of each file for the calculation of the CPU time of the job of an estimated system and the input/output time of a disk device. CONSTITUTION:In a working computer system 11, the CPU time used by a job and the input/output frequency for each file used by the job are counted by a CPU time measuring instrument 1 and an input/output frequency measuring instrument 3 and then stored in the memory devices 2 and 4. Then a processor 7 calculates the CPU time of the job for the CPU type designated by an indicating device 6 from the CPU time held by the device 2 and the performance value stored in a memory device 5 at every CPU type. While a processor 10 calculates the input/output frequency and the input/output time at every disk device designated by an indicating device 9 from the input/output frequency stored in the device 4 and the access time stored in a memory device 8 at every disk device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a computer performance evaluation system, and particularly to predictive evaluation of the amount of load processed by a computer.

[Conventional technology]

In computer systems where the load is expected to increase,
Configure a system that can handle that load.

Capacity planning, which considers and plans from multiple angles such as operational and cost aspects, is essential. In this capacity planning, the basic tasks are to predict the future load and the performance (response time, throughput, etc.) of the system that will handle that load. It is the amount of system resources (CP (J, memory, magnetic disk device, MT device, etc.)).

For jobs currently being processed in the system, the load on the future system is estimated based on actual measurement data, but in the past, this estimate was done manually on a desk.

[Problem that the invention seeks to solve]

However, in performance prediction evaluation, it is usual to change the system configuration and make predictions for many cases. In predictive evaluations regarding disk devices, the distribution of input/output loads is often evaluated by changing the combination of stored files.

Load amounts must be estimated for each of these numerous system configuration plans, but in the past there was a problem in that complicated calculations had to be repeated and estimating took time.

An object of the present invention is to solve the above-mentioned problems and to provide a computer performance evaluation system that can flexibly respond to various required system configuration plans and quickly predict the amount of load in the system configuration.

[Means for solving problems]

The system of the present invention is a first method for measuring and maintaining the usage time of a central processing unit used by a computer system.
a first storage means for holding performance values for each of a plurality of types of central processing units, a first instruction means for specifying the type of the central processing unit, and a first measuring means supplied from the first measuring means. The specified central processing unit reads out the corresponding performance value from the first storage unit in response to the specified central processing unit usage time and the type of medium heat processing unit specified by the first instruction unit. a first processing means for converting into central processing unit usage time corresponding to the type of device; a second measuring means for measuring and retaining the number of inputs and outputs for each file used by the job in the computer system; a second storage means for storing the access time for each type of disk device; a 2@2 specification means for specifying the model of the disk device and the file to be stored in the disk device; and the second measuring device. Read and designate the corresponding access time from the second storage means in response to the supplied input/output count for each file, the type of the disk device designated by the second designation means, and the file to be stored. and second processing means for calculating the number of input/output times and input/output time of the disk device.

〔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 present invention.

The computer performance evaluation 7 stem in Figure 'ig1 is a CPU time measurement device 1 that measures the CPU time used by a job in a computer system 11 that is in operation, a storage device 2 that holds the measurement results, and a computer that is in operation. system 11
an input/output frequency measuring device 3 that measures the number of input/outputs for each file used by a job; a storage device 4 that stores the measurement results; a storage device i5 that stores performance values for each CPU model; An instruction device 6 to specify, a processing device 7 that calculates the CPU time of the job on the specified friend CPU model, a storage device 8 that holds the access time for each disk device model, and a storage device 8 for storing the access time for each disk device model and each disk device. Instruction device R9 to specify the file to be
and a processing bag [10] that calculates the number of input/outputs and the input/output time for each specified disk device.

In this embodiment, the CPU time measurement device 1 measures the CPLJ time used by the computer system 11 in operation, and the value is stored in the storage device 2. The number of physical input/outputs is measured by the input/output frequency measuring device 3, and the value is held in the storage device ft4.

Next, the CPU model in operation and the CPU model whose load amount is to be predicted are specified to the instruction device 6.

The processing device 7 reads the CPU performance values of the two designated models from the storage device 5 and calculates the performance ratio between the two models. Next, read the measured CPU time from the storage device 2,
The CP of the model targeted for prediction by calculating the performance ratio on this value
Get U time. For example, the CPU model in operation is model A.
, if the high-end model whose CPU time is to be predicted is model B and its performance ratio is N, then the measured CPU time of model A is multiplied by 1.

Load amount prediction when changing files stored in a disk device or when changing a disk model will be described next. The files stored in each disk device and the disk model are specified to the instruction device 9. processing bag f
iiiOμ, the number of input/outputs measured for each file is read from the storage device 4, and the number of input/outputs for each disk device is calculated from this and the storage information of the designated next file.

Next, the average access time of the specified disk model is read from the storage device 8, and this access time is multiplied by the number of input/outputs to obtain the input/output time. For example, if you specify that three files X, Y, and Z are to be stored in a certain disk device, and the number of input/outputs for each file read from the storage device 4 is X, y, and 2 times, then O1 calculates the number of input/outputs to the disk device as x + y + z times.
If the average access time of this disk model read from the storage device 8 is T, the input/output time is Tx(x-1-
y+z).

In this manner, in this embodiment, performance evaluation can be quickly performed when the system configuration is changed.

〔Effect of the invention〕

In the present invention, configuration information of a system to be predicted is specified by a CPU model, a disk model, and a file stored in each disk device, and the system is configured with J? By automatically calculating the CPU time and the disk device input/output time of a job to be processed, it is possible to quickly and easily predict the amount of system load in a large number of evaluation cases required for capacity planning work. In particular, performance prediction is often performed when files stored in a disk device are changed, and the present invention has the advantage that the amount of load in such cases can be calculated in a short time.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1... CPU time measuring device, 2, 4, 5.8.
...Storage device, 3...Input/output frequency measuring device, 6, 9...Instruction device, 7,10...--
- Processing device, 11... Operating computer system.

Claims (1)

[Scope of Claims] A first measuring means for measuring and retaining the usage time of a central processing unit used by a job in a computer system; and a first storage means for retaining performance values for each of a plurality of types of central processing units. and a first instruction means for specifying the type of the central processing unit; and the central processing unit usage time supplied from the first measuring means and the type of the central processing unit specified by the first instruction means. a first processing means for reading the corresponding performance value from the first storage means and converting it into a central processing unit usage time corresponding to the specified type of the central processing unit; a second measuring device that measures and stores the number of inputs and outputs for each file used by the job; a second storage device that stores access times for each of a plurality of types of disk devices; a second specifying means for specifying a file to be stored in the disk device; and a second specifying means for specifying the number of input/outputs for each file supplied from the second measuring means;
Upon receiving the type of the disk device specified by the specifying means and the file to be stored, the corresponding access time is read from the second storage means, and the number of input/outputs and the input/output time of the specified disk device are determined. A computer performance evaluation system comprising: second processing means for calculating.