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SubjectRe: [PATCH v3 00/10] Optimize cgroup context switch
On Thu, Nov 14, 2019 at 2:45 AM Peter Zijlstra <> wrote:
> On Wed, Nov 13, 2019 at 04:30:32PM -0800, Ian Rogers wrote:
> > Avoid iterating over all per-CPU events during cgroup changing context
> > switches by organizing events by cgroup.
> When last we spoke (Plumbers in Lisbon) you mentioned that this
> optimization was yielding far less than expected. You had graphs showing
> how the use of cgroups impacted event scheduling time and how this patch
> set only reduced that a little.
> Any update on all that? There seems to be a conspicuous lack of such
> data here.

I'm working on giving an update on the numbers but I suspect they are
better than I'd measured ahead of LPC due to a bug in a script.


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