Date: Fri, 21 Jan 2005 11:58:17 +0200 From: Claudiu Dragalina-Paraipan <dr.clau@gmail.com> To: Joseph Koshy <joseph.koshy@gmail.com> Cc: Marco Trentini <mark@remotelab.org> Subject: Re: clock time in milliseconds into a c program Message-ID: <c2d45d6e050121015876defa22@mail.gmail.com> In-Reply-To: <84dead72050120181965c70231@mail.gmail.com> References: <20050120004406.GF921@einstein.lab> <41EFBEA5.50007@spintech.ro> <84dead72050120181965c70231@mail.gmail.com>
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Or you can use PERFMON. Check manual page for perfmon. It gives you access to internal counters of CPU. Of course this is a subjective measurement, since, AFAIK, the counters are not kept separately for every process, but for entire system, including kernel. Maybe repeating the same measurement for many times, with a system running no other CPU consumers, you will get a more accurate measurement . On Fri, 21 Jan 2005 02:19:15 +0000, Joseph Koshy <joseph.koshy@gmail.com> wrote: > > I don't think there is a streight way to speed-up the default > > unix time resolution, which is, as far as i know, in > > microseconds. > > On i386 (and possibly amd64) platforms you can use the > RDTSC instruction to get a direct measure of processor > cycles elapsed. > > -- > FreeBSD Volunteer, http://people.freebsd.org/~jkoshy > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > -- Claudiu Dragalina-Paraipan e-mail: dr.clau@gmail.com
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