Re: TCP_STREAM performance regression on commit b3613118
From: Rick Jones <hidden>
Date: 2012-03-06 18:24:00
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On 03/06/2012 12:11 AM, Feng Tang wrote:
On some machines, we found there is about 10% resgression of netperf TCP-64K loopback test between 3.2 and 3.3-rc1. The exact test is: ./netperf -t TCP_STREAM -l 60 -H 127.0.0.1 -i 50,3 -I 99,5 -- -s 32768 -S 32768 -m 4096
Side comment on the netperf command line. The maximum confidence interactions is silently capped at 30, so that might as well be "-i 30,3" http://www.netperf.org/svn/netperf2/tags/netperf-2.5.0/doc/netperf.html#index-g_t_002di_002c-Global-28 Also, for reproducibility, it might be desirable to pin netperf and netserver to a specific CPU or CPUs. That would be with a global -T option: http://www.netperf.org/svn/netperf2/tags/netperf-2.5.0/doc/netperf.html#index-g_t_002dT_002c-Global-41 happy benchmarking, rick jones