lkml.org 
[lkml]   [2013]   [Dec]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Perf: Correct Assumptions about Sample Timestamps in Passes
On Thu, Dec 26, 2013 at 10:24:03AM -0500, David Ahern wrote:
> On 12/26/13, 10:14 AM, Frederic Weisbecker wrote:
> >>I was carrying that patch while working on perf-kvm-stat-live last
> >>Fall. It does not solve the problem for live commands, so ended up
> >>dropping it and going with local (to the command) hacks. I still
> >>think for live commands getting a perf_clock timestamp at the start
> >>of a round and using that as the flush time will work best.
> >
> >Ok, but how would you fetch this perf clock timestamp, with an explicit read?
>
> One option is exporting perf_clock to userspace.
>
> Preferably a built-in option, https://lkml.org/lkml/2013/12/10/781,
> but I can go the module route if I have to:
> https://github.com/dsahern/linux/blob/perf-full-monty/README.ahern

I see, that's one of the very verbose threads I've seen lately ;)


\
 
 \ /
  Last update: 2013-12-26 16:41    [W:0.067 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site