Date: Mon, 23 Jul 2007 17:38:35 -0700 From: Julian Elischer <julian@elischer.org> To: Jeremie Le Hen <jeremie@le-hen.org> Cc: Jeff Roberson <jroberson@chesapeake.net>, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, cvs-src@FreeBSD.org Subject: Re: cvs commit: src/sys/kern kern_descrip.c Message-ID: <46A54A0B.4000109@elischer.org> In-Reply-To: <20070723201642.GC96643@obiwan.tataz.chchile.org> References: <200707032126.l63LQ7ea027929@repoman.freebsd.org> <20070703142714.F552@10.0.0.1> <20070723201642.GC96643@obiwan.tataz.chchile.org>
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Jeremie Le Hen wrote: > Hi Jeff, > > On Tue, Jul 03, 2007 at 02:27:51PM -0700, Jeff Roberson wrote: >> For the curious, these last two patches make a substantial improvement to >> mysql write performance on my 8way opteron: >> >> http://people.freebsd.org/~jeff/mysqlwrite.png >> >> The green line is without and the blue line is with. > > Just for information, do you have any hint why Linux eventually > performs better above 18 threads? I think that is the wrong question.. the question is "why do we drop off after 8?" which I'm sure Jeff is already working on. > > Thank you for your work. > Best regards,
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