MULTI-CORE PROCESSOR SYSTEM, CONTROL PROGRAM, AND CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To improve execution performance of a CPU.SOLUTION: Other CPU detects coincidence between an instruction address for a task B held in a table to access a shared memory and a program counter for the other CPU, as preprocessing of access. The other CPU determines whether a value of an access flag is a minus by checking the access flag. If a value of the access flag is 0, the other CPU determines that one CPU is accessing the shared memory and the other CPU switches a task from the task B to a task C in a ready queue 121.