Date: Tue, 02 Sep 1997 16:50:41 -0600 From: Steve Passe <smp@csn.net> To: Antti-Pekka Liedes <apl@mail.cs.hut.fi> Cc: freebsd-smp@FreeBSD.ORG Subject: Re: SMP performance on P5 systems? Message-ID: <199709022250.QAA01672@Ilsa.StevesCafe.com> In-Reply-To: Your message of "Wed, 03 Sep 1997 00:51:01 %2B0300." <19970903005101.00664@hutcs.cs.hut.fi>
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Hi, >> The current SMP performance on my Tyan Tomcat IIID dual pentium 200MMX >> system is not quite what I had expected, as a simple benchmark, this is >> what it takes for me to compile kernel, with UP kernel: >> make -j3 283.19s user 32.56s system 94% cpu 5:32.83 total >> and with SMP: >> make -j3 341.23s user 134.72s system 183% cpu 4:18.80 total > >try -j16, using just 3 processes are leaving you diskbound. I'm sorry, I meant -j12. the point of diminishing returns is around -j12 for 2 P6s, experiment with between -j8 and -j12 to find the right number for your hardware. -- Steve Passe | powered by smp@csn.net | Symmetric MultiProcessor FreeBSD
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