Patents Represented by Attorney Dan Baker, Maxham, Jester & Meador Hubert

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  • Reordering of memory reference operations and conflict resolution via rollback in a multiprocessing environment
    Patent number: 5872990
    Abstract: Compile and/or run time instruction scheduling is used in a multiprocessing system to reorder memory access instructions such that a strongly consistent programming model is emulated in a fashion transparent to the programmer. The multiprocessing system detects potential shared memory conflicts, avoiding these conflicts by restarting operation of the affected processing unit at a predetermined previous state, previously archived in a rollback register set, and resuming instruction execution from that state.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: February 16, 1999
    Assignee: International Business Machines Corporation
    Inventors: David Arnold Luick, John Christopher Willis, Philip Braun Winterfield