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    SubjectRe: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible
    Ingo Molnar <> writes:
    > One good way to see cache bounces is to run a misses/accesses ratio profile:
    > perf top -e cache-misses -e cache-references --count-filter 10
    > Note the two events: this runs a 'weighted' profile, you'll see (LLC)
    > cache-misses of a function relative to cache-references it does, a
    > misses/references ratio in essence.

    If anyone does this on a Nehalem please only use 2.6.39-rc*+ which
    includes the offcore patches. Anything before that will get you complete
    bogus numbers.

    BTW with Lin-Ming's memory latency profiling code you can do this much
    more directly.

    -- -- Speaking for myself only

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      Last update: 2011-03-24 21:59    [W:0.018 / U:21.268 seconds]
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