COMPUTER SYSTEM FOR PREVENTING DELAY OF EXECUTION TIME OF INSTRUCTION EXECUTED WHILE EXCLUSIVELY USING EXTERNAL RESOURCE, METHOD THEREFOR AND COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a mechanism for adjusting timing wherein housekeeping processing is executed and timing wherein the lock of a shared external resource is acquired by a thread on a server and for not holding a lock for a long time. SOLUTION: This computer system includes: a lock part for executing an instruction to acquire exclusive use and an instruction to release the exclusive use in the thread so as to prevent delay of an execution time of at least one instruction executed while exclusively using the external resource in computer program execution environment wherein at least one thread is executed; a counter part for increasing or decreasing a value of a counter associated to each thread according to the execution of the instruction to acquire the exclusive use or the instruction to release the exclusive use; and a control part controlling execution order of the instruction executed while exclusively using the external resource and an instruction causing the delay of the execution time of the instruction executed while exclusively using the external resource. COPYRIGHT: (C)2010,JPO&INPIT