lkml.org 
[lkml]   [2018]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] perf: Suppress AUX/OVERWRITE records
Em Fri, May 04, 2018 at 03:09:59PM +0300, Alexander Shishkin escreveu:
> On Wed, Apr 04, 2018 at 05:53:23PM +0300, Alexander Shishkin wrote:
> > It has been pointed out to me many times that it is useful to be able
> > to switch off AUX records to save the bandwidth for records that actually
> > matter, for example, in AUX overwrite mode.
> >
> > The usefulness of PERF_RECORD_AUX is in some of its flags, like the
> > TRUNCATED flag that tells the decoder where exactly gaps in the trace are.
> > The OVERWRITE flag, on the other hand will be set on every single record
> > in overwrite mode. However, a PERF_RECORD_AUX[flags=OVERWRITE] is
> > generated on every target task's sched_out, which over time adds up to
> > a lot of useless information.
> >
> > If any folks out there have userspace that depends on a constant stream of
> > OVERWRITE records for a good reason, they'll have to let us know.
> >
> > Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> > Cc: Markus Metzger <markus.t.metzger@intel.com>
> > Cc: Adrian Hunter <adrian.hunter@intel.com>
>
> This one seems to be slipping through the cracks.

So, did you got Acked-by or tested-by from anyone?


- Arnaldo

\
 
 \ /
  Last update: 2018-05-04 17:36    [W:0.067 / U:11.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site