On Mon, 19 Nov 2007, Alexey Popov wrote:
Robert Watson wrote:
FreeBSD 7 contains significant optimization for increased numbers of cores,
and is where a lot of the work optimizing MySQL has ended up. I see you're
trying out a 6.3 beta, any chance you could try out a 7.0 beta instead?
Also, consider switching to "options SCHED_ULE" in the 7.0 kernel rather
than "options SCHED_4BSD".
I tried SCHED_ULE, but got no difference:
Did you see no change in throughput, or no change in reported CPU use?
We should probably take this thread to performance@ and get Kris involved. He
may be interested in trying to reproduce your workload in our testbed so we
can perform measurements of our own, as well as getting you to provide
profiling information. One of the things we'd most like to have are nice
potted benchmarks for real-world workloads, as that allows us to easily replay
them, perform measurements, optimize, etc.
Thanks,
Robert N M Watson
Computer Laboratory
University of Cambridge
last pid: 1063; load averages: 22.75, 13.76, 6.31 up 0+00:07:24
17:53:49
56 processes: 33 running, 23 sleeping
CPU states: 26.5% user, 0.0% nice, 68.1% system, 0.3% interrupt, 5.1% idle
Mem: 365M Active, 20M Inact, 102M Wired, 664K Cache, 46M Buf, 3419M Free
Swap: 2048M Total, 2048M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
1019 www 1 101 0 101M 51244K RUN 6 0:37 26.86% httpd
1040 www 1 -4 0 92476K 42956K RUN 1 0:36 26.76% httpd
1004 www 1 -4 0 92476K 42864K RUN 4 0:38 25.98% httpd
1018 www 1 101 0 91452K 41736K CPU3 3 0:37 25.68% httpd
1000 www 1 101 0 92476K 42544K RUN 0 0:36 25.29% httpd
1026 www 1 101 0 93500K 39900K CPU0 0 0:35 25.20% httpd
1021 www 1 101 0 101M 49432K RUN 4 0:37 25.10% httpd
1024 www 1 101 0 93500K 44416K RUN 5 0:37 25.10% httpd
1020 www 1 101 0 94524K 43684K RUN 0 0:37 25.00% httpd
1030 www 1 101 0 96576K 46004K RUN 3 0:36 25.00% httpd
1031 www 1 101 0 101M 50956K RUN 3 0:37 24.66% httpd
1025 www 1 101 0 94524K 43880K RUN 5 0:36 24.56% httpd
1041 www 1 101 0 92476K 41792K RUN 2 0:36 24.56% httpd
1022 www 1 101 0 101M 48932K RUN 5 0:36 24.27% httpd
With best regards,
Alexey Popov
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