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Re: [PATCH] Use uname not sysctl to get the kernel revision
Arjan van de Ven wrote:
It is a short busy wait before falling asleep. I assume you mean
busy wait is a loss even on SMP?
eh yeah I forgot to think for a second. But yes even for SMP busy wait
is pretty bad power wise nowadays.. at least if you wait more than a few
hundred cycles. (and if you wait less... then it's almost unlikely that
it'll be useful as well)
It depends greatly; if a lock is likely to get released by the user
after a few memory accesses, spinning is likely to be a win.