Messages in this thread | | | Subject | Re: [PATCH] tsc-disable_B9 | From | Alan Cox <> | Date | 26 Aug 2002 20:05:13 +0100 |
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On Mon, 2002-08-26 at 19:45, Martin J. Bligh wrote: > It's not correlating it to real time that's the problem. It's getting resceduled > inbetween calls that hurts. Take your example. > > rdtsc > mov %eax,%ebx > <- get rescheduled here > rdtsc > > Broken. May even take negative "time".
Statistically irrelevant. When you have 100,000 samples all the pre-emption ones drop into the dud sample filter with IRQ disturbance and so on.
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