Date: Fri, 28 Oct 2005 07:29:03 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Mark Kirkwood <markir@paradise.net.nz> Cc: David Xu <davidxu@freebsd.org>, "Yuriy N. Shkandybin" <jura@networks.ru>, current@freebsd.org Subject: Re: Timers and timing, was: MySQL Performance 6.0rc1 Message-ID: <28339.1130477343@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 28 Oct 2005 11:59:07 %2B1300." <43615BBB.2080702@paradise.net.nz>
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In message <43615BBB.2080702@paradise.net.nz>, Mark Kirkwood writes: >Chuck Swiger wrote: > >> FreeBSD 5.4-STABLE i386 >> null function: 0.01278 >> getpid(): 0.51329 >> time(): 2.54771 >> gettimeofday(): 2.54982 >> > >Chuck - very interesting results. I happen to have a PIII 1Ghz running >5.4-RELEASE so thought it would be interesting to reproduce your >numbers. My null and getpid pretty much do, but the time functions seem >much quicker on my machine - some sort of regression in 5.4-STABLE maybe? No, different timecounter hardware. Use sysctl kern.timecounter to see what your hardware uses. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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