METHOD FOR AVOIDING DEADLOCK OF DATA COMMUNICATION SYSTEM, ITS SYSTEM, AND ITS CONTROL PROGRAM

摘要

PROBLEM TO BE SOLVED: To solve the problem of a deadlock or the like in a data processing system due to a write command.;SOLUTION: A header analysis unit N_i1, when receiving a write command from a node N1, simultaneously notifies a response generation unit N_i3 about Requester ID information and issues a write command to a memory control unit N_i2. The memory control unit N_i2 writes in a memory and notifies the response generation unit N_i3 about the write command completed and the redundant code of written data. The response control unit N_i3 sends a CplD having a Tag ID with a predetermined value to the node N1, which is the sender of the write command. The node N1 reports the completion of the write command to a DMA Engine N_i4 based on the Tag ID of the Cpl ID received.;COPYRIGHT: (C)2009,JPO&INPIT