Messages in this thread |  | | | Subject | Re: [RFC][PATCH] Introduce CLOCK_REALTIME_COARSE | | From | Nicholas Miell <> | | Date | Sat, 18 Jul 2009 23:48:01 -0700 |
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On Sat, 2009-07-18 at 23:14 -0700, Arjan van de Ven wrote: > it's on x86.. likely/unlikely don't impact the CPU (since there are no > "ignore the branch predictor" hints), only the code placement.....
But code placement does affect branch prediction (e.g. the Pentium 4 static predictor assumes backward branches are taken, recent AMD processors prefer you to arrange code such that conditional branches are not taken, etc.)
-- Nicholas Miell <nmiell@comcast.net>
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