JPH01100651A - Data processing system - Google Patents

Abstract

PURPOSE:To correctly receive a processing result and the report of an error even when a bus occupation is released after a processing request by giving a reception number to the processing request to a memory unit from processing units and returning the processing result in the memory unit together with the reception number. CONSTITUTION:Processing units 2 and 3 are connected to a bus 4 of data processing system and a request to a reading and a writing from one of the processing units 2 and 3 is processed by a memory unit 1 having a memory. The unit 1 gives the reception number at every request from the processing units 2 and 3 and returns them. Next, the unit 1 discontinues a bus action once and processes received data and an address. When the processing is terminated, the given reception number together with the processing result is sent to the bus 4. The sent data are supervised by the respective processing units 2 and 3 and the termination of the processing is confirmed by the coincidence with the reception number sent and stored previously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is suitable for use as a data transfer means for the memory of an electronic computer system.

〔overview〕

The present invention, in the data transfer means of the processing unit to the memory, returns the processing result in the memory together with the acceptance number of the processing request from the processing unit, thereby releasing the bus from occupation after the processing request and shortening the occupation time. It is something to do.

[Conventional technology]

Conventionally, in this type of computer system, the bus is occupied until the end of data transfer processing.

[Problem that the invention seeks to solve]

Such a conventional data transfer method has the drawback that when the memory iU1 is in use, the bus is occupied until the processing of the memory unit is completed, resulting in a reduction in transfer speed. Furthermore, when writing to memory, the bus occupation time can be reduced by providing a buffer memory in the memory unit, but there is a drawback that there is no means to report when an error is detected in processing within the memory unit.

The present invention aims to eliminate such drawbacks, and aims to provide a data processing method that can receive processing results and error reports even if the bus is released from occupation after a processing request.

[Means for solving problems]

The present invention comprises a plurality of processing units, a memory unit having request processing means for processing requests related to reading and writing from one of the processing units, and a bus connecting the processing unit and the memory unit. In the data processing method, the memory unit has a reception number sending means for returning a reception number corresponding to each request to the processing unit that issued the request, and each of the processing units sends a reception number corresponding to the request to its own unit. The memory unit has a processing result sending means for sending a processing result accompanied by the receiving number onto the bus, and each of the processing units is connected to the bus. Reception number comparing means for comparing the above reception number with the reception number stored in the reception number storage means, and processing result receiving means for receiving the processing result accompanied by this reception number based on the comparison result of this reception number comparison means. It is characterized by having the following.

[Effect]

A reception number is given to a processing request from the processing unit to the memory unit, and the processing result in the memory unit is returned together with the reception number. Therefore, even if the bus is released after a processing request, processing results and error reports can be correctly received.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. 1st
The figure is a block configuration diagram showing the configuration of this embodiment.

This embodiment, as shown in FIG. 3 and a bus 4 connecting this memory unit 1, where the memory unit 1 has reception number sending means for returning a reception number corresponding to each request to the processing unit that issued the request, Each of processing units 2 and 3 is
The memory unit 1 has a reception number storage means for storing the reception number sent back to its own unit, and the memory unit 1 further has a processing result sending means for sending the processing result accompanied by the reception number onto the bus 4. Each of the processing units 2 and 3 includes a reception number comparing means for comparing the reception number on the bus 4 with the reception number stored in the reception number storage means, and a reception number comparing means based on the comparison result of the reception number comparison means. It has a processing result receiving means for receiving a processing result accompanied by a processing result.

Now, when memory unit 1 receives a processing request from processing units 2 and 3, it returns a reception number to processing units 2 and 3. Next, addresses and data are received from processing units 2 and 3, and the bus operation is temporarily terminated. When the processing within the memory unit 1 is completed, the memory unit 1 sends the reception number onto the bus and then sends the processing result. On the other hand, processing units 2 and 3 receive and store the reception number after sending out the processing request, and then send out the address data and temporarily terminate the bus operation. Thereafter, the processing units 2 and 3 monitor the bus, and if they detect the stored reception number, they receive the processing results and end the bus operation. FIGS. 2 and 3 are flowcharts showing the processing procedure described above. Note that correct error reporting becomes possible by including error information in the processing results.

〔Effect of the invention〕

As explained above, the present invention shortens the bus occupation time by returning a reception number in response to a processing request, and it becomes possible to receive correct processing results without occupying the bus and waiting until the processing is completed. This has the effect of improving bus utilization efficiency and speeding up data transfer.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a flow diagram showing the processing order of the embodiment of the present invention. FIG. 3 is a flow diagram showing the processing order of the embodiment of the present invention. 1...Memory, 2.3...Processing unit, 4...
bus. Structure of the embodiment Fig. 1 Flowchart of the embodiment Fig. 2 Flowchart of the embodiment Fig. 3

Claims (1)

[Claims] (1) A memory unit comprising a plurality of processing units, a request processing means for processing requests related to reading and writing from one of the processing units, and a bus connecting the processing unit and this memory unit. In the data processing method, the memory unit has a reception number sending means for returning a reception number corresponding to each request to the processing unit that issued the request, and each of the processing units receives the reception number that is returned to its own unit. the memory unit has a processing result sending means for sending a processing result accompanied by the receiving number onto the bus, and each of the processing units has a reception number comparing means for comparing the reception number of 1 with the reception number stored in the reception number storage means; and a processing result receiving means for receiving the processing result accompanied by the reception number based on the comparison result of the reception number comparison means. A data processing method characterized by: