MEMORY MANAGEMENT SYSTEM, MEMORY MANAGING METHOD FOR THE MEMORY MANAGEMENT SYSTEM AND COMPUTER READABLE STORAGE MEDIUM STORED WITH PROGRAM INFORMATION FOR THE MEMORY MANAGING METHOD

摘要

PROBLEM TO BE SOLVED: To shorten processing time for memory reservation processing by completing the memory reservation processing with only reservation from an area which is allocated only to each CPU as much as possible. ;SOLUTION: A shared memory 200 divides a memory area (area G 200-0) which is allocable to whole CPUs and memory areas (areas 1 to N) which are allocable only to each CPU 1 to N and manages them. A memory demand predicting means 304 calculates a memory demand predictive amount based on a reserved memory amount from a part where a CPU allocates all of the CPUs 1 to N in a prescribe unit time so that memory reservation processing from the memory 200 can be completed only with reservation from the part which does not need exclusive control as much as possible and is allocated only to a prescribed CPU. A memory reserving means 301 reserves memory from the part which is allocable to all of the CPUs based on the predictive amount and moves the reserved memory to the part which is allocated only to the prescribed CPU. This reduces overhead that is caused by lock acquisition wait which is necessary exclusive control.;COPYRIGHT: (C)1998,JPO