Cache coherency between CPU cache hierarchies

    公开(公告)号:GB2493880A

    公开(公告)日:2013-02-20

    申请号:GB201221421

    申请日:2009-03-27

    Applicant: INTEL CORP

    Abstract: A first processor 101, such as a central processing unit (CPU), is in a cache coherency domain with a first set of coherency rules 109. Another processor 105, such as a graphics processing unit (GPU), is in a different coherency domain 111 with a second set of coherency rules. The first processor has a level 1 processor cache 103 (L1 cache) and a lower level processor cache 107. The second processor has a level 1 graphics cache 104 (L1 cache) and a lower level cache 108. The first processor uses the first set of coherency rules with the lower level graphics cache. The second processor uses the second set of coherency rules with the lower level graphics cache. The lower level graphics cache may be a mid-level or last level cache. The first processor may snoop the lower level graphics cache.

    Cache coherency between a CPU cache hierarchy and a graphics cache hierarchy

    公开(公告)号:GB2495032A

    公开(公告)日:2013-03-27

    申请号:GB201222945

    申请日:2009-03-27

    Applicant: INTEL CORP

    Abstract: A processor 101, such as a central processing unit (CPU), is in a cache coherency domain with a first set of coherency rules 109. A graphics device 105, such as a graphics processing unit (GPU), is in a different coherency domain 111 with a second set of coherency rules. The processor has a level 1 processor cache 103 (L1 cache) and a lower level processor cache 107. The graphics device has a level 1 graphics cache 104 (L1 cache) and a lower level graphics cache 108. The central processing unit uses the first set of coherency rules with the lower level graphics cache. The graphics device uses the second set of coherency rules with the lower level graphics cache. The lower level graphics cache may be a mid-level or last level cache. The processor may snoop the lower level graphics cache.

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