Date: Fri, 28 Oct 2005 18:14:52 +0800 From: David Xu <davidxu@freebsd.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: Pertti Kosunen <pertti.kosunen@pp.nic.fi>, current@freebsd.org, "Yuriy N. Shkandybin" <jura@networks.ru> Subject: Re: Timers and timing, was: MySQL Performance 6.0rc1 Message-ID: <4361FA1C.1070103@freebsd.org> In-Reply-To: <30622.1130493370@critter.freebsd.dk> References: <30622.1130493370@critter.freebsd.dk>
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Poul-Henning Kamp wrote: > In message <4361F057.4030904@pp.nic.fi>, Pertti Kosunen writes: > > >>Does polling affect to this test? > > > Not apart from the CPU overhead. > > sysctl kern.timecounter.hardware > > is much more important. > > and all the reports here which fail to include it are mostly > useless. > > I suspect because our time() function in libc uses gettimeofday, this further causes lots of gettimeofday syscall.
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