Date: Sat, 26 Jun 2004 19:31:06 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/geom geom_io.c Message-ID: <Pine.NEB.3.96L.1040626193046.58671K-100000@fledge.watson.org> In-Reply-To: <200406262327.i5QNRgrC080318@repoman.freebsd.org>
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On Sat, 26 Jun 2004, Robert Watson wrote: > The g_up and g_down threads use a local 'mymutex' mutex to allow WITNESS > to warn about attempts to sleep in the I/O path. This change pushes the > definition and use of 'mymutex' behind #ifdef WITNESS to avoid the cost > in non-debugging cases. This results in a clear .22% performance win for > 512 byte and 1k I/O tests on my SMP test box. Not much, but every bit > counts. Ooops, left out: Reviwed by: phk Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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