linux-kernel - Re: [PATCH 1/1] perf,tools: open event on evsel cpus and threads

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Date:	Mon, 31 Aug 2015 17:31:15 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	kan.liang@...el.com, jolsa@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] perf,tools: open event on evsel cpus and threads

Em Fri, Aug 21, 2015 at 03:54:36PM +0200, Jiri Olsa escreveu:
> On Fri, Aug 21, 2015 at 02:23:14AM -0400, kan.liang@...el.com wrote:
> > From: Kan Liang <kan.liang@...el.com>
> > 
> > evsel may have different cpus and threads as evlist's.
> > Use it's own cpus and threads, when open evsel in perf record.
> 
> Acked-by: Jiri Olsa <jolsa@...nel.org>

Applying, I wonder if this isn't affecting other tools as well... And
also perf_evlist__open(), that has to be fixed as well, right?

- Arnaldo
 
> thanks,
> jirka
> 
> > 
> > Signed-off-by: Kan Liang <kan.liang@...el.com>
> > ---
> >  tools/perf/builtin-record.c | 2 +-
> >  tools/perf/util/evlist.c    | 4 ++++
> >  2 files changed, 5 insertions(+), 1 deletion(-)
> > 
> > diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> > index 25cf6b4..a0178bf 100644
> > --- a/tools/perf/builtin-record.c
> > +++ b/tools/perf/builtin-record.c
> > @@ -279,7 +279,7 @@ static int record__open(struct record *rec)
> >  
> >  	evlist__for_each(evlist, pos) {
> >  try_again:
> > -		if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) {
> > +		if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
> >  			if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
> >  				if (verbose)
> >  					ui__warning("%s\n", msg);
> > diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> > index 373f65b..be6fde9 100644
> > --- a/tools/perf/util/evlist.c
> > +++ b/tools/perf/util/evlist.c
> > @@ -1179,6 +1179,10 @@ int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **e
> >  		if (evsel->filter == NULL)
> >  			continue;
> >  
> > +		/*
> > +		 * filters only work for tracepoint event, which doesn't have cpu limit.
> > +		 * So evlist and evsel should always be same.
> > +		 */
> >  		err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter);
> >  		if (err) {
> >  			*err_evsel = evsel;
> > -- 
> > 1.8.3.1
> > 
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