JPS62245472A - Multicomputer system - Google Patents

Abstract

PURPOSE:To reduce the load on a communication between computers and to improve fault detecting and separating ability by composing a multicomputer system of a multicomputer module consisting of two processors having a shared memory and a communication line which connects multicomputer modules mutually. CONSTITUTION:A couple of processors 4 and 4 in the same multicomputer module 6 have an interprocessor communication through the shared memory 1. An interprocessor communication between different multicomputer modules 6 and 6 is performed through the communication line 7 and a communication controller 7. A shared memory bus controller 3, on the other hand, arbitrates the simultaneous use of the shared memory 1 between two processors 4 and 4. The interprocessor communication through the shared memory 1 is fast and software processing is simple, so the load on the interprocessor communication is reduced; even if the same task is performed by two processors 4 and 4 and a fault detecting process wherein the results are compared with each other is performed, it does not affect the load on the CPUs much and the fault detecting and separating ability is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to aircraft mission computers, industrial machines, control computers for plants, etc. that require high processing power and high reliability using multiple processors. This invention relates to a complex computer system capable of load balancing.

[Prior Art] As shown in FIG. 2, a conventional complex computer system of this kind that requires high processing power and high reliability and is capable of load distribution connects all processors 01.
01. ...It was configured to send and receive information between them.

For this reason, the performance of the system has been limited due to the limited capacity of the communication line 05 and the burden of controlling the communication line.

[Problems to be Solved by the Invention] In the conventional system configuration described above, the processing load of communication between distributed processors was large, and the ability to detect and isolate faults was low.

The present invention solves the above-mentioned problems, keeps the overhead of communication between processors low, and improves failure detection and isolation capabilities.

[Means and effects for solving the problems] The present invention has the following configuration.

1) The system is composed of multiple composite computer modules.

2) These multiple composite computer modules are connected through communication lines.

3).Each composite computer module consists of two processors with shared memory.

In the above configuration, inter-processor communication is normally performed between paired processors within the same composite computer module via a shared memory. When a failure occurs in a composite computer module, the set of processors in which the failure has occurred is separated, and processing continues with the remaining processors. Processor-to-processor communication between composite computer modules is performed via communication lines.

This configuration is designed to reduce the load on communication between processors and improve fault detection and isolation capabilities.

[Embodiment] An embodiment of the present invention will be described with reference to FIG. In FIG. 1, 1 to 5 are components of a composite computer module 6, where 1 is a shared memory shared by a pair of internal processors 4.4, and 2 is an internal composite computer module 61. processor 4 provided
3 is a shared memory bus control device that controls access to the shared memory 1; 4 is a shared memory bus control device that executes processing according to a program; and a processor provided in an external composite computer module. A processor 5 is a local memory used for processing by a corresponding processor. A composite computer module 6 made up of such components is connected to other identically configured modules 6 via a communication line 7.

A pair of processors 4, 4 within the same composite computer module 6 perform inter-processor communication via the shared memory 1. Different composite computer modules6.
Communication between processors 6 is performed via a communication line 7 and a communication control device 2. A shared memory bus control device 3 allows two processors 4, 4, which form a pair, to access the shared memory 1 at the same time.
This is to arbitrate when trying to use .

Inter-processor communication via the shared memory 1 is fast and software processing is simple, so the load due to inter-processor communication can be reduced. Further, for this reason, even if the two processors 4, 4 execute the same task and perform a fault detection process in which the results are compared, the CPU load is not greatly affected, and the fault detection/isolation ability can be improved.

[Effects of the Invention] As described in detail above, according to the present invention, a composite computer system is configured by a composite computer module composed of two processors each having a shared memory and a communication line that interconnects the composite computer modules. By doing so, it is possible to reduce the load on communication between processors and improve fault detection and isolation capabilities.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a composite computer system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional composite computer system. 1.1...Shared memory, 2.2...Communication control device,
3.3... Shared memory bus control device, 4.4... Processor, 5.5... Local memory, 6.6...
Composite computer module, 7...communication line.

Claims (1)

[Claims] 1. A composite computer system comprising at least two sets of composite computer modules composed of two processors each having a shared memory, and these composite computer modules are connected to each other by a communication line.