Re: REGRESSION: Performance regressions from switchinganon_vma->lock to mutex

[Peter Zijlstra]

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).

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/