JPH0471045A - Memory control system - Google Patents

Abstract

PURPOSE:To prevent processing from being delayed by securing a memory area for a command generated from a JOB requiring urgency or a command generated from an OS or the like which is to be executed prior to other processing. CONSTITUTION:The user of a complete guarantee area 9 is specified by a means 6 for setting up which memory out of divided memories is to be used in a command. The command is generated from a master information processor 1 and transmitted to a slave information processor 2 through a channel 3. A using area commanded by the command is referred and the using area is secured from the area 9 by a means 7 for using a memory specified by the command and the command is executed. As to a command not requiring urgency, its using area is secured from an idle memory 8, and when no idle memory exists, its processing is waited until an idle memory can be secured.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a memory management method in an information processing device,
In particular, it relates to the process of securing a usable area for commands that require certainty and speed.

[Conventional technology]

Conventionally, in memory management systems, the area necessary for executing a command is secured from free memory, and if there is no free memory, the execution of the command is made to wait until free memory becomes available.

[Problem to be solved by the invention]

In the conventional memory management method described above, urgent JO
Even the commands issued by B and the commands issued by O8 may have to wait because there is no free memory, which has the drawback of increasing processing time.

[Means to solve the problem]

The memory management method of the present invention provides an information processing system that includes a higher-level information processing device that issues commands and a lower-level information processing device that executes commands that are connected by a channel. The upper information processing device is configured to have a means for managing the memory and a means for using the memory specified by the command, and a means for setting in the command which memory among the divided memories is to be used. .

Furthermore, in the memory management system of the present invention, the memory is configured to be used preferentially according to the type of command, and to have an area reserved for the execution of urgent commands.

〔Example〕

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

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

In the figure, the memory management method divides the memory into an upper information processing device 1, a lower information processing device 2, a channel 3 connecting these two devices, and a memory 4 on the lower information processing device 2. a means 5 for managing, a means 6 for setting in a command which of the divided memories in the upper information processing device 1 is to be used, a means 7 for using the memory specified by the command, and an empty memory 8; It consists of a completely guaranteed area 9.

The upper information processing device 1 issues a command, and the lower information processing device 2 executes the command. Means to divide and manage memory 5
is located on the lower-level information processing device 2, and manages the memory 4 by dividing it into an empty memory 8 and a completely guaranteed area 9. This division is done at system generation time. The complete security area 9 is an area large enough to be used only for emergency commands.

A means 6 for setting in a command which of the divided memories is to be used is located in the upper information processing device 1, and sets in the command which of the empty memory 8 and the fully guaranteed area 9 to be used.

The means 7 for using the memory specified by the command is located in the lower information processing device 2, and if the command specifies the use of the fully guaranteed area 9, the fully guaranteed area 9 is reserved, otherwise the usable area is secured as empty memory. do.

Next, the operation of executing an urgent command will be explained.

First, use of the completely guaranteed area 9 is designated by means 6 for setting in a command which of the divided memories is to be used. This command is issued from the higher-level information processing device 1 and sent to the lower-level information processing device 2 via the channel 3.The memory specified by the command is used by referring to the usage area instructed by the command. The means 7 secures a usable area from the completely guaranteed area 9 and executes the command.

For non-urgent commands, a usable area is secured from the empty memory 8, and if the memory is insufficient, the processing waits until an empty memory becomes available.

〔Effect of the invention〕

As explained above, the present invention secures a memory area for commands issued by urgent jobs and commands issued by O8 etc. that need to be prioritized over other processes.
This has the effect of eliminating delays in processing due to insufficient space.

6... Means for setting in a command which memory of the divided memory is to be used, 7... Means for using memory specified by a command, 8... Empty memory, 9 ...Completely guaranteed area.

Claims (1)

[Claims] 1. In an information processing system including a higher-level information processing device that issues commands and a lower-level information processing device that executes commands, which are connected by a channel, the lower-level information processing device manages memory by dividing it. and means for using the memory specified by the command, and the upper information processing device has means for setting in the command which of the divided memories to use. method. 2. The memory management system according to claim 1, wherein the memory is used preferentially according to the type of command, and has an area reserved for urgent command execution.