Date: Sat, 20 May 2006 11:00:40 -0700 From: Julian Elischer <julian@elischer.org> To: David Xu <davidxu@freebsd.org> Cc: freebsd-threads@freebsd.org Subject: Re: optimize msleep with PCATCH flag Message-ID: <446F5948.8040508@elischer.org> In-Reply-To: <200605201112.21415.davidxu@freebsd.org> References: <200605200935.54828.davidxu@freebsd.org> <446E75C2.4080305@elischer.org> <200605201112.21415.davidxu@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
David Xu wrote: >On Saturday 20 May 2006 09:49, Julian Elischer wrote: > > >>looks like you need to do a lot more samples to get a better error >>value.. (8 may not be enough) >> >> > >Is 40 enough ? this time, the system runs in single user mode, so >any noise is eliminated. > > That is a much clearer picture.. Thanks! >x plain_PCATCH.st >+ PCATCH_optimized.st >+--------------------------------------------------------------------------+ >| + | >| + + | >| + + | >| + + x x | >| + ++++ + x xx | >| ++++++++++ + xx x xxxxx x | >|+ +++++++++++++ + x xxx+xxxxxxxxx xxx x x xxx xx x x x| >| |____A____| |_______M____A___________| | >+--------------------------------------------------------------------------+ > N Min Max Median Avg Stddev >x 40 31199 38404 32691.5 33376.775 1740.5576 >+ 40 28245 31794 29300.5 29380.8 649.64192 >Difference at 95.0% confidence > -3995.98 +/- 584.857 > -11.9723% +/- 1.75229% > (Student's t, pooled s = 1313.69) >_______________________________________________ >freebsd-threads@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-threads >To unsubscribe, send any mail to "freebsd-threads-unsubscribe@freebsd.org" > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?446F5948.8040508>