Messages in this thread | | | From | "Chen, Kenneth W" <> | Subject | RE: bug in sched.c:task_hot() | Date | Tue, 5 Oct 2004 10:15:49 -0700 |
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Nick Piggin wrote on Monday, October 04, 2004 8:18 PM > >This bug causes large amount of incorrect process migration across > >cpus (at stunning 10,000 per second) and we lost cache affinity very > >quickly and almost took double digit performance regression on a db > >transaction processing workload. Patch to fix the bug. Diff'ed against > >2.6.9-rc3. > > > > This one looks OK (the other may need a bit of rethinking). > What kernel is the regression in relation to, out of interest?
Performance regression was initially seen on 2.6.8 relative to 2.6.6. We subsequently narrowed down to these set of bugs.
- Ken
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