Date: Wed, 14 Apr 2010 19:51:21 +0300 From: Andriy Gapon <avg@freebsd.org> To: Adam Vande More <amvandemore@gmail.com> Cc: alc@freebsd.org, Maho NAKATA <chat95@mac.com>, alan.l.cox@gmail.com, freebsd-stable@freebsd.org, als@modulus.org Subject: Re: How to reproduce: Re: Only 70% of theoretical peak performance on FreeBSD 8/amd64, Corei7 920 Message-ID: <4BC5F289.7020408@freebsd.org> In-Reply-To: <m2y6201873e1004140945n855c8800we9baced2e293f270@mail.gmail.com> References: <h2yca3526251004122230l909bc93ey916d7fe0dd24fd33@mail.gmail.com> <4BC402B7.5000400@modulus.org> <v2gca3526251004122322i709c523ct4f93bcf75a778a8e@mail.gmail.com> <20100414.082109.29593248145846106.chat95@mac.com> <4BC5DEB4.1090208@freebsd.org> <x2k6201873e1004140934z6f7518b9j72ffd9e1adc1ad49@mail.gmail.com> <m2y6201873e1004140945n855c8800we9baced2e293f270@mail.gmail.com>
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on 14/04/2010 19:45 Adam Vande More said the following: > > also if I run cpuset on the dgemm then the utilization is basically at > the theoretical max for one core so at least that part is working. You can also try procstat -t <pid> to find out thread IDs and cpuset -t to pin the threads to the cores. -- Andriy Gapon
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