linux-kernel - Re: [PATCH] perf, tools, stat: Fix perf stat -T

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Message-ID: <20150728142132.GB575@kernel.org>
Date:	Tue, 28 Jul 2015 11:21:32 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>, jolsa@...nel.org
Subject: Re: [PATCH] perf, tools, stat: Fix perf stat -T

Em Tue, Jul 28, 2015 at 04:10:06PM +0200, Jiri Olsa escreveu:
> On Mon, Jul 27, 2015 at 04:24:51PM -0700, Andi Kleen wrote:
> > From: Andi Kleen <ak@...ux.intel.com>
> > 
> > The transaction length metrics in perf stat -T broke recently.
> > It would not match the metric correctly and always print K/sec.
> > This was caused by a incorrect update of the cycles_in_tx statistics.
> > Update the correct variable.
> > 
> > Also the check for zero division was reversed, which resulted
> > in K/sec being printed for no transactions. Fix this also up.
> > 
> > Cc: jolsa@...nel.org
> > Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> > ---
> >  tools/perf/util/stat-shadow.c | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> > 
> > diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
> > index 53e8bb7..2a5d8d7 100644
> > --- a/tools/perf/util/stat-shadow.c
> > +++ b/tools/perf/util/stat-shadow.c
> > @@ -85,7 +85,7 @@ void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
> >  	else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
> >  		update_stats(&runtime_cycles_stats[ctx][cpu], count[0]);
> >  	else if (perf_stat_evsel__is(counter, CYCLES_IN_TX))
> > -		update_stats(&runtime_transaction_stats[ctx][cpu], count[0]);
> > +		update_stats(&runtime_cycles_in_tx_stats[ctx][cpu], count[0]);
> 
> oops, looks like copy&paste issue.. thanks
> 
> 
> we now print comment line if the avg is 0, but I think it's ok
> 
> Acked-by: Jiri Olsa <jolsa@...nel.org>

This affects just perf/core, right?
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