Re: regression caused by cgroups optimization in 3.17-rc2

From: Dave Hansen
Date: Tue Sep 02 2014 - 23:16:10 EST


On 09/02/2014 06:33 PM, Johannes Weiner wrote:
> kfree isn't eating 56% of "all cpu time" here, and it wasn't clear to
> me whether Dave filtered symbols from only memcontrol.o, memory.o, and
> mmap.o in a similar way. I'm not arguing against the regression, I'm
> just trying to make sense of the numbers from the *patched* kernel.

I guess I could have included it in the description, but that was a
pretty vanilla run:

perf top --call-graph=fp --stdio > foo.txt

I didn't use any filtering. I didn't even know I _could_ filter. :)

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