TESTING SYSTEM FOR MULTIPROCESSOR SYSTEM

摘要

PURPOSE:To make a controlling part changeable which accesses an I/O device in the unit of I/O-instruction by setting a lock control flag and a lock address in an I/O control table, and providing a priority processing function in a scheduler. CONSTITUTION:The lock control flag part 312 in the I/O-control table 31-36 has an area of one byte, and in this area, an 'FF' is set with a 16-ary value at the time when either one of controlling parts 11-14 collates to or writes in the said table. The lock address part 311 has an area of two bytes. When the part 312 is in 'FF' with 16-ary value i.e. the said table is in a locked state, the address of the one of the parts 11-14 that locked the part 312 is set in the said area of the part 311. The priority processing part 21 in the scheduler 2 gives priority to the controlling parts issuing an I/O-instruction in the order of their arrivals.