CONTROL SYSTEM FOR ALLOCATION OF PHYSICAL BLOCK

摘要

PURPOSE:To improve the processing efficiency of a control system by dividing a stack in a central processing unit into plural blocks and allocating the physical blocks of a virtual stack system corresponding to a multiplex process in various allocation systems according to the operating situation of the control system. CONSTITUTION:An LRU(Least Recentry Used)1, a logic part 2 and an allocating block deciding part 3 are provided. The LRU1 is used for allocation in case a stack fault is produced in a physical block allocation mode owing to a fact that a single process used the stack over a block boundary. While the part 2 is used for allocation if the stack fault is produced by the switch of processes. Thus it is possible to decrease the stack fault frequency and to improve the system processing efficiency.