Date: Fri, 28 Oct 2005 12:34:48 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: David Xu <davidxu@freebsd.org> 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: <31129.1130495688@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 28 Oct 2005 18:30:22 %2B0800." <4361FDBE.7000500@freebsd.org>
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In message <4361FDBE.7000500@freebsd.org>, David Xu writes: >Now, I can confirm mysqld calls time() function lots of time, I have >changed time() to call clock_gettime, now there is few of gettimeofday >in ktrace result, but fully filled by clock_gettime. the correct way to optimize this would be to add a time(2) systemcall which returns the value of the kernel global time_second. -- 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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