Messages in this thread | | | Subject | Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex | From | Peter Zijlstra <> | Date | Wed, 15 Jun 2011 23:37:29 +0200 |
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On Wed, 2011-06-15 at 14:12 -0700, Tim Chen wrote: > Thanks to Andi for providing the info. We've used this workaround in > our testing so it will not mask true kernel scaling bottlenecks.
http://programming.kicks-ass.net/sekrit/39-2.txt.bz2 http://programming.kicks-ass.net/sekrit/tip-2.txt.bz2
tip+sirq+linus is still slightly faster than .39 here, although removing that sysconf() wreckage closed the gap considerably (needing to know the number of cpus to optimize locking sounds like a trainwreck all of its own, needing it _that_ often instead of just once at startup is even worse).
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