Date: Tue, 4 Mar 2008 00:51:49 -0500 From: Garrett Wollman <wollman@FreeBSD.org> To: Jeff Roberson <jroberson@chesapeake.net> Cc: current@FreeBSD.org Subject: Re: cvs commit: src/sys/kern sched_ule.c Message-ID: <18380.58229.379738.408078@hergotha.csail.mit.edu> In-Reply-To: <20080301222513.Y920@desktop> References: <200803020821.m228L0Yw042389@repoman.freebsd.org> <20080301222513.Y920@desktop>
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<<On Sat, 1 Mar 2008 22:29:50 -1000 (HST), Jeff Roberson <jroberson@chesapeake.net> said: > Kris has done some excellent benchmarking as usual. Here you can see the > improvement in postgres depending on various scheduler debug settings: > http://people.freebsd.org/~kris/scaling/pgsql-16cpu.png Can you comment on the area under the knee in the 8-cpu topologies? I seems surprising that 16 cores performs worse than 8 cores in this regime. -GAWollman
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