INFORMATION PROCESSING APPARATUS AND CONTROL METHOD OF INFORMATION PROCESSING APPARATUS

摘要

An information processing apparatus including a plurality of mutually connected system boards, wherein each of the system boards includes: a plurality of processors; and a plurality of memories each of which stores data and directory information corresponding to the data, and corresponds to any one of the processors, and wherein each of the plurality of processors, upon receiving a read request for data stored in a memory corresponding to the own processor from another processor, performs an exclusive logical sum operation on identification information included in the read request and identifying the another processor and a check bit included in the directory information and identifying a processor which holds target data of the read request, increments a count value included in the directory information and indicating the number of processors which hold the target data, and sets presence information included in the directory information and indicating a system board which includes the another processor.

主权项

1. An information processing apparatus comprising a plurality of mutually connected system boards,
wherein each of the plurality of mutually connected system boards comprises:
a plurality of processors; anda plurality of memories each of which stores data and directory information corresponding to the data, and corresponds to any one of the processors, and wherein each of the plurality of processors, upon receiving a read request for data stored in a memory corresponding to the own processor from another processor, performs an exclusive logical sum operation on identification information included in the read request and identifying the another processor and a check bit included in the directory information and identifying a processor which holds target data of the read request, increments a count value included in the directory information and indicating the number of processors which hold the target data, sets presence information included in the directory information and indicating a system board which includes the another processor, and outputs the target data to the another processor which has issued the read request.