From linux-kernel Sat Aug 21 09:23:22 2004 From: Lee Revell Date: Sat, 21 Aug 2004 09:23:22 +0000 To: linux-kernel Subject: Re: [patch] voluntary-preempt-2.6.8.1-P5 Message-Id: <1093080202.854.94.camel () krustophenia ! net> X-MARC-Message: https://marc.info/?l=linux-kernel&m=109308045816746 On Sat, 2004-08-21 at 05:18, Ingo Molnar wrote: > * Lee Revell wrote: > > > > > http://krustophenia.net/testresults.php?dataset=2.6.8.1-P6#/var/www/2.6.8.1-P6/trace8.txt > > > > > > i suspect if you turn off tracing (or disable it in the kernel > > > completely) then you'd see below-100 usec latencies here. A trace entry > > > costs ~0.3 usecs on your box, so this 50-entry trace has roughly 15 > > > usecs of tracing overhead :-) > > > > > > > FWIW, I did see one of these over 200 usecs. > > which trace is this? > Sorry, I was thinking of this one: http://krustophenia.net/testresults.php?dataset=2.6.8.1-P6#/var/www/2.6.8.1-P6/trace10.txt Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/