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    Managing fetch and store requests in a cache pipeline
    1.
    发明专利
    Managing fetch and store requests in a cache pipeline 未知

    公开(公告)号：GB2456405A

    公开(公告)日：2009-07-22

    申请号：GB0822457

    申请日：2008-12-10

    Applicant: IBM

    Inventor： JACOBI CHRISTIAN ,  FABEL SIMON ,  PFLANZ MATTHIAS ,  TAST HANS-WERNER ,  ULRICH HANNO

    IPC: G06F12/08 ,  G06F12/0855 ,  G06F12/0862 ,  G06F12/0893

    Abstract: In a cache accessed under the control of a cache pipeline (14), store requests are managed in a store queue (10) and read requests are managed in a read queue (12), respectively, and prioritization logic (18) decides if a read request or a write request is to be forwarded to the cache pipeline (14). The prioritization logic (62) aborts a store request that has started if a fetch request arrives within a predetermined store abort window and grants cache access to the arrived fetch request. When the fetch request no longer requires the input stage of the cache pipeline, a control mechanism repeats the access control of the aborted store request for a further trial to access the pipeline (14). Preferably, the store abort window spans 3 to 7 cycles, preferably 4 or 5 cycles, and starts after 2 to 4 cycles, preferably 3 cycles.

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