Messages in this thread |  | | Date | Thu, 4 Oct 2001 21:35:07 -0700 | From | Mike Kravetz <> | Subject | Re: Context switch times |
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On Fri, Oct 05, 2001 at 02:45:26AM +0200, Andrea Arcangeli wrote: > doesn't lmbench wakeup only via pipes? Linux uses the sync-wakeup that > avoids reschedule_idle in such case, to serialize the pipe load in the > same cpu.
That's what I thought too. However, kernel profile data of a lmbench run on 2.4.10 reveals that the pipe routines only call the non-synchronous form of wake_up. I believe I reached the same conclusion in the 2.4.7 time frame by instrumenting this code.
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