Messages in this thread | | | Subject | Re: UDP-U stream performance regression on 32-rc1 kernel | From | Mike Galbraith <> | Date | Thu, 05 Nov 2009 08:03:18 +0100 |
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On Thu, 2009-11-05 at 06:20 +0100, Mike Galbraith wrote: > On Thu, 2009-11-05 at 10:20 +0800, Zhang, Yanmin wrote: > > On Wed, 2009-11-04 at 13:07 +0100, Mike Galbraith wrote: > > > > Can you try the below, and send me > > I tested it on Nehalem machine against the latest tips kernel. netperf loopback > > result is good and regression disappears. > > Excellent. Ingo has picked up a version in tip (1b9508f) which has zero > negative effect on my x264 testcase, and is a win for mysql+oltp through > the whole test spectrum. As that may (dunno, Ingo?) now be considered a > regression fix, ie candidate for 32.final, testing that it does no harm > to your big machines would be a good thing. (pretty please?:)
Egad. Size XXL difference on my cheap Q6600 box
git v2.6.32-rc6-26-g91d3f9b Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec
65536 4096 60.00 7793073 0 4256.06 65536 60.00 7780487 4249.18
git v2.6.32-rc6-26-g91d3f9b + 1b9508f Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec
65536 4096 60.00 15133547 0 8264.93 65536 60.00 15131466 8263.80
tip v2.6.32-rc6-1796-gd995f1d Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec
65536 4096 60.00 13998562 0 7645.08 65536 60.00 13986112 7638.28 (uhoh, tinker time.)
-Mike
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