COMMUNICATIONS PROTOCOL FOR HANDLING ARBITRARILY VARYING DATA STRIDES IN A DISTRIBUTED PROCESSING ENVIRONMENT

    公开(公告)号:CA2107303C

    公开(公告)日:1998-09-15

    申请号:CA2107303

    申请日:1993-09-29

    Applicant: IBM

    Abstract: Apparatus and an accompanying method for implementing a communications protocol for use in generally a distributed, and particularly a highly parallel, multi-processing system (5), for communicating application data of arbitrarily v arying strides between separate processors and generally without the need for intermediate data storage. Specifically, application data is transferred through a succession of p ackets (770) between originating and destination application programs (252), with each packet containing a partial data message. Each partial data message contains a portion of the data that is stored in a stride one portion of an originating application data m emory (700). Upon reception, each data portion is written into a stride one portion of a dest ination application data memory (760). An application interface (254), executing indepen dently at both the originating and destination processing elements (10 1, 10J+1) locall y and respectively determines the starting address and length of each separate stride one data portion stored in the originating application data memory and for each separate stride one area in the destination application program memory that is to receive applicatio n data. Advantageously, through use of these independent application interfaces, applica tion data can be transferred from the originating application data memory at one arbitrari ly varying stride to the destination application memory with a different arbitrarily varyin g stride but without the need to pass the data through any input/output (I/O) buffers (632,63 4).

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