linux-kernel - Re: [PATCHv3] perf stat: Add id into perf

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Date:	Mon, 8 Jun 2015 11:03:40 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCHv3] perf stat: Add id into perf_stat struct

Em Thu, Jun 04, 2015 at 03:50:55PM +0200, Jiri Olsa escreveu:
> On Wed, Jun 03, 2015 at 04:25:51PM +0200, Jiri Olsa wrote:
> > We need fast way to identify evsel as transaction event
> > for shadow counters computation. Currently we are using
> > possition (in evlist) based way.
> > 
> > Adding 'id' into 'struct perf_stat' so it can carry transaction
> > event ID and we can use it for shadow counters computations.
> > 
> > Link: http://lkml.kernel.org/n/tip-9lnvjksibrs0flhkpix2qkm9@git.kernel.org
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> > ---
> 
> using perf_evsel__name instead of evsel->name pointer

It now passes 'perf test' on rhel7/fedora21 systems, but it fails on a
rhel6 system, I applied it, will test it further on the rhel6 system to
see what went wrong there, unless you do it first ;-)

[root@...dy ~]# perf test 15
15: struct perf_event_attr setup                             :sh: line
1:  5381 Aborted                 (core dumped)
PERF_TEST_ATTR=/tmp/tmp8ZBLwc /home/acme/bin/perf stat -o
/tmp/tmp8ZBLwc/perf.data --group -e cycles,instructions kill > /dev/null
2>&1
sh: line 1:  5438 Aborted                 (core dumped)
PERF_TEST_ATTR=/tmp/tmpnRDADB /home/acme/bin/perf stat -o
/tmp/tmpnRDADB/perf.data -e '{cycles,instructions}' kill > /dev/null
2>&1
 Ok
[root@...dy ~]# uname -r
2.6.32-504.8.1.el6.x86_64
[root@...dy ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.6 (Santiago)
[root@...dy ~]# 

- Arnaldo


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