lkml.org 
[lkml]   [2017]   [Dec]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC] Sharing PMU counters across compatible events
Hello, Peter.

On Tue, Dec 12, 2017 at 11:37:36PM +0100, Peter Zijlstra wrote:
> That would be a fairly massive change from how perf works today. And the
> obvious pain point would be changing the per-cpu event set, which would
> mean recomputing all possible combinations of task sets.
>
> Also note that each context (cpu,task) is allowed to have more events
> than fit on the PMU, at which point we'll start rotating events. Do we
> also pre-compute all possible rotation sets?
>
> Just not quite seeing this..

Yeah, right. Will think more about it

Thanks.

--
tejun

\
 
 \ /
  Last update: 2017-12-13 17:18    [W:0.051 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site