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    SubjectRe: [RFC] time: xtime_lock is held too long
    > Unless I am very mistaken, it cannot explain my original report of up to
    > 24.000 instructions waiting in ktime_get()

    Yes it's a different problem. Sorry for hijacking your thread.

    >
    > BTW, how many consecutive prefetch() a cpu can 'store/execute' before
    > throwing away hints ?

    It depends on the CPU. Older ones had a small number only. On the
    newer ones it tends to be limited by the various queues to memory,
    which are a shared resource (so it also depends on what the other
    threads/cores are doing)

    I normally assume as a rule of thumb < 50

    -Andi

    --
    ak@linux.intel.com -- Speaking for myself only.


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