JPH0425963A - Online processor installation system for multi-processor system - Google Patents

Abstract

PURPOSE:To increase a processor without interrupting an online processing by transferring state control data of a processing online process to a new increased processor. CONSTITUTION:For increasing the processor, the process distribution table of load distribution is rewritten. The existed processor transfers control data of the process allocated to the newly increased processor to the newly increased processor through an inter-processor communication bus 1. An event and a message on the transmitted process are transmitted to the new processor. The newly increased processor succeeds a state by transferred process control data and succeeds the online processing. Even if there is the event and the message on the process before process control data is transferred, the transfer is waited for. Then, a load is distributed in accordance with the new process distribution table.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an online processor addition method for a loosely coupled multiprocessor system that performs load distribution control.

[Conventional technology]

Conventionally, in this type of processor expansion method, only new processes were assigned to newly installed processors.

[Problem to be solved by the invention]

The disadvantage of the conventional processor expansion method described above is that the online process currently being processed cannot be transferred to the newly installed processor, and therefore the online process must be temporarily interrupted in order to distribute the load evenly. There is.

An object of the present invention is to transfer the state management data of a process that is to be assigned to an added processor from an existing processor to a newly added processor among online processes being processed, thereby allowing the processing of the processor without interrupting online processing. An object of the present invention is to provide an online processor expansion method for a multiprocessor system.

[Means to solve the problem]

The online processor addition method for a multiprocessor system of the present invention is a method for adding online processors to a loosely coupled multiprocessor system that performs load distribution control, in which process state management data being processed online is transferred to a new processor added. means and
The present invention is characterized by comprising processing means for performing continuous processing in the newly added processor using process state management data during the online processing.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a system block diagram of a loosely coupled multiprocessor system showing one embodiment of the present invention.

In FIG. 1, a processor 2 making up the system
1,22. 2n communicate via the interprocessor communication bus 1. Local memory 31.32. ~3n stores program data so that each processor 21, 22~2n can run independently.

FIG. 2 is a flowchart showing an example of a procedure for adding a processor to the system shown in FIG. 1 during online processing.

When adding processors during online processing, the process distribution for distributing the processor load is rewritten (step S2>
. Next, the existing processor transfers the management data of the process assigned to the newly added processor to the newly added processor via the inter-processor communication bus 1 (step S3
). Since the process distribution has been rewritten in step S2, all events and messages related to the transmitted process will be sent to the new processor.
The newly installed processor takes over the status based on the transferred process management data and continues online processing (hand*S).
4). If there are events and messages related to the above process before the process management data is transferred,
The transfer is deferred until the process management data is transferred. This completes the processor addition process (step S5), and from now on load distribution will be performed according to the new process distribution. Note that the above steps S3 and 84 are performed in each local memory 31, 32 . Processing is performed by the processors 2122 and -2n executing the programs stored in -3n.

〔Effect of the invention〕

As explained above, according to the present invention, by transferring the state management data of the online process being processed to the newly added processor, it is possible to add a processor and distribute the load without interrupting online processing. There is an effect that it can be done.

[Brief explanation of drawings]

FIG. 1 is a system block diagram of a loosely coupled multiprocessor system showing an embodiment of the present invention, and FIG. 2 is a flowchart 1 showing an example of an online expansion procedure in the system shown in FIG. 1. Inter-processor communication bus, 2.n. Processor, ~3.. Local memory.

Claims (1)

[Claims] In an online processor addition method for a loosely coupled multiprocessor system that performs load distribution control, a transfer means for transferring process state management data being processed online to a new added processor; 1. An online processor expansion method for a multiprocessor system, characterized by comprising processing means for continuous processing based on process state management data contained therein.