Messages in this thread |  | | Subject | 2.6.25-rc1: volanoMark 45% regression | From | "Zhang, Yanmin" <> | Date | Wed, 13 Feb 2008 17:30:28 +0800 |
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volanoMark has 45% regression with kernel 2.6.25-rc1 on my both 8-core stoakley and 16-core Tigerton.
I used bisect to locate below patch.
commit 58e2d4ca581167c2a079f4ee02be2f0bc52e8729 Author: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Date: Fri Jan 25 21:08:00 2008 +0100
sched: group scheduling, change how cpu load is calculated
hackbench has about 30% regression on 16-core tigerton, but has about 10% improvement on 8-core stoakley.
In addition, tbench has about 6% regression on my 8-core stoakley and 25% regression on 16-core stoakley. Some other benchmarks, like netperf/aim7 also have some regression. I will verify if they are all related to the patch.
-yanmin
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