lkml.org 
[lkml]   [2015]   [May]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH V4 18/24] perf tools: Add Intel BTS support
Em Thu, May 07, 2015 at 10:05:28AM +0300, Adrian Hunter escreveu:
> On 06/05/15 16:35, Arnaldo Carvalho de Melo wrote:
> > Em Wed, May 06, 2015 at 10:14:36AM +0300, Adrian Hunter escreveu:
> >> Perhaps we should disallow intel_bts and intel_pt PMU events
> >> explicitly and put that change back to v4.1 stable at least?
> >>
> >> I tried adding:
> >>
> >> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> >> index 244c66f..5d3ab7c 100644
> >> --- a/tools/perf/util/pmu.c
> >> +++ b/tools/perf/util/pmu.c
> >> @@ -442,6 +442,10 @@ static struct perf_pmu *pmu_lookup(const char *name)
> >> LIST_HEAD(aliases);
> >> __u32 type;
> >>
> >> + /* No support for intel_bts or intel_pt so disallow them */
> >> + if (!strcmp(name, "intel_bts") || !strcmp(name, "intel_pt"))
> >> + return NULL;
> >> +
> >> /*
> >> * The pmu data we store & need consists of the pmu
> >> * type value and format definitions. Load both right
> >>
> >>
> >> And now I get:
> >>
> >> $ tools/perf/perf record -e intel_bts//u ls
> >> invalid or unsupported event: 'intel_bts//u'
> >> Run 'perf list' for a list of valid events
> >
> > Unsure, when did we start accepting intel_bts in event names? In this patchkit?
>
> Any old version of perf tools will accept PMU names as events. It validates
> against /sys/bus/event_source/devices.
>
> So "intel_pt" and "intel_bts" will turn up in v4.1, so I was suggesting
> disallowing them in perf tools for v4.1 since there is no tool support until
> v4.2.

Well, please add that to some patchkit after I process the current set
of patches, which I'll try to after pushing a batch that I have, to
avoid spamming lkml too much each time :-)

- Arnaldo


\
 
 \ /
  Last update: 2015-05-08 22:21    [W:0.083 / U:3.760 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site