On Fri, Sep 27, 2013 at 05:14:27PM +0800, Yuanhan Liu wrote: > On Wed, Sep 25, 2013 at 09:38:38AM -0700, tip-bot for Peter Zijlstra wrote: > > Commit-ID: f27dde8deef33c9e58027df11ceab2198601d6a6 > > Gitweb: http://git.kernel.org/tip/f27dde8deef33c9e58027df11ceab2198601d6a6 > > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > AuthorDate: Wed, 14 Aug 2013 14:55:31 +0200 > > Committer: Ingo Molnar <mingo@xxxxxxxxxx> > > CommitDate: Wed, 25 Sep 2013 14:07:49 +0200 > > > > sched: Add NEED_RESCHED to the preempt_count > > Hi Peter, > > FYI, here we found a pigz regression by this commit. I just can't help myself; but pigs aren't supposed to fly anyway! :-) > Here is a list all of changed stats by this commit and it's parent 4a2b4b222743bb07fedf985b884550f2ca067ea9: > > time.involuntary_context_switches [ 3184 - 4753 ] [ 5.536e+05 - 5.9042e+05 ] > time.voluntary_context_switches [ 84559 - 1.2223e+05 ] [ 1.1008e+07 - 1.1092e+07 ] Gah, that looks like it completely wrecked preemptions. What kind of PREEMPT Kconfig options do you use? Or rather; could you attach your .config? -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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