linux-kernel - Re: [RFC] Don't print sample_type bits in non-group events not set in the group's was Re: [PATCH] perf, script: Fix crash with printing mixed trace point and other events

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Date:   Fri, 18 Jan 2019 17:17:08 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [RFC] Don't print sample_type bits in non-group events not set
 in the group's was Re: [PATCH] perf, script: Fix crash with printing mixed
 trace point and other events

On Fri, Jan 18, 2019 at 08:11:42AM -0800, Andi Kleen wrote:
> > +static bool perf_evsel__should_skip(struct perf_evsel *evsel)
> > +{
> > +	struct perf_event_attr *attr = &evsel->attr;
> > +	struct perf_evsel *leader = evsel->leader;
> > +
> > +	return (leader != evsel) && !attr->freq && !attr->sample_freq;
> > +}
> > +
> >  static int process_sample_event(struct perf_tool *tool,
> >  				union perf_event *event,
> >  				struct perf_sample *sample,
> > @@ -1934,6 +1942,9 @@ static int process_sample_event(struct perf_tool *tool,
> >  	struct perf_script *scr = container_of(tool, struct perf_script, tool);
> >  	struct addr_location al;
> >  
> > +	if (perf_evsel__should_skip(evsel))
> > +		return 0;
> 
> That just skips, but surely it has to be displayed somewhere?
>

yea as I wrote in that email:

.......   we should probably skip (something like below) that and
add script field that would output the sample_read values for the
leader

jirka