Subject: Re: [PATCH v2 1/5] perf record: Set PERF_RECORD_PERIOD if attr->freq is set.

From: Arnaldo Carvalho de Melo <[email-masked]>
Date: Tue, 28 Jul 2020 13:03:09 -0300

Em Tue, Jul 28, 2020 at 05:43:47PM +0200, Jiri Olsa escreveu:
> On Tue, Jul 28, 2020 at 01:57:30AM -0700, Ian Rogers wrote:
> > From: David Sharp <[email-masked]>
> > 
> > evsel__config() would only set PERF_RECORD_PERIOD if it set attr->freq
> > from perf record options. When it is set by libpfm events, it would not
> > get set. This changes evsel__config to see if attr->freq is set outside of
> > whether or not it changes attr->freq itself.
> > 
> > Signed-off-by: David Sharp <[email-masked]>
> > Signed-off-by: Ian Rogers <[email-masked]>
> 
> Acked-by: Jiri Olsa <[email-masked]>

So, somebody else complained that its not PERF_RECORD_PERIOD (there is
no such thing) that is being set, its PERF_SAMPLE_PERIOD.

Since you acked it I merged it now, with that correction,

- Arnaldo
 
> thanks,
> jirka
> 
> > ---
> >  tools/perf/util/evsel.c | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> > 
> > diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> > index ef802f6d40c1..811f538f7d77 100644
> > --- a/tools/perf/util/evsel.c
> > +++ b/tools/perf/util/evsel.c
> > @@ -979,13 +979,18 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts,
> >  	if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
> >  				     opts->user_interval != ULLONG_MAX)) {
> >  		if (opts->freq) {
> > -			evsel__set_sample_bit(evsel, PERIOD);
> >  			attr->freq		= 1;
> >  			attr->sample_freq	= opts->freq;
> >  		} else {
> >  			attr->sample_period = opts->default_interval;
> >  		}
> >  	}
> > +	/*
> > +	 * If attr->freq was set (here or earlier), ask for period
> > +	 * to be sampled.
> > +	 */
> > +	if (attr->freq)
> > +		evsel__set_sample_bit(evsel, PERIOD);
> >  
> >  	if (opts->no_samples)
> >  		attr->sample_freq = 0;
> > -- 
> > 2.28.0.163.g6104cc2f0b6-goog
> > 
> 

-- 

- Arnaldo