linux-kernel - Re: [PATCH] perf inject: Make --strip keep evsels

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Date:   Wed, 6 Nov 2019 10:56:43 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf inject: Make --strip keep evsels

Em Wed, Nov 06, 2019 at 12:03:52PM +0100, Jiri Olsa escreveu:
> On Tue, Nov 05, 2019 at 12:00:57PM +0200, Adrian Hunter wrote:
> > create_gcov (refer to the autofdo example in
> > tools/perf/Documentation/intel-pt.txt) now needs the evsels to read the
> > perf.data file. So don't strip them.
> > 
> > Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> > ---
> >  tools/perf/builtin-inject.c | 54 -------------------------------------
> >  1 file changed, 54 deletions(-)
> 
> good stats ;-)

:-)
 
> Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks, applied.
 
> thanks,
> jirka
> 
> > 
> > diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
> > index 372ecb3e2c06..1e5d28311e14 100644
> > --- a/tools/perf/builtin-inject.c
> > +++ b/tools/perf/builtin-inject.c
> > @@ -578,58 +578,6 @@ static void strip_init(struct perf_inject *inject)
> >  		evsel->handler = drop_sample;
> >  }
> >  
> > -static bool has_tracking(struct evsel *evsel)
> > -{
> > -	return evsel->core.attr.mmap || evsel->core.attr.mmap2 || evsel->core.attr.comm ||
> > -	       evsel->core.attr.task;
> > -}
> > -
> > -#define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
> > -		     PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
> > -
> > -/*
> > - * In order that the perf.data file is parsable, tracking events like MMAP need
> > - * their selected event to exist, except if there is only 1 selected event left
> > - * and it has a compatible sample type.
> > - */
> > -static bool ok_to_remove(struct evlist *evlist,
> > -			 struct evsel *evsel_to_remove)
> > -{
> > -	struct evsel *evsel;
> > -	int cnt = 0;
> > -	bool ok = false;
> > -
> > -	if (!has_tracking(evsel_to_remove))
> > -		return true;
> > -
> > -	evlist__for_each_entry(evlist, evsel) {
> > -		if (evsel->handler != drop_sample) {
> > -			cnt += 1;
> > -			if ((evsel->core.attr.sample_type & COMPAT_MASK) ==
> > -			    (evsel_to_remove->core.attr.sample_type & COMPAT_MASK))
> > -				ok = true;
> > -		}
> > -	}
> > -
> > -	return ok && cnt == 1;
> > -}
> > -
> > -static void strip_fini(struct perf_inject *inject)
> > -{
> > -	struct evlist *evlist = inject->session->evlist;
> > -	struct evsel *evsel, *tmp;
> > -
> > -	/* Remove non-synthesized evsels if possible */
> > -	evlist__for_each_entry_safe(evlist, tmp, evsel) {
> > -		if (evsel->handler == drop_sample &&
> > -		    ok_to_remove(evlist, evsel)) {
> > -			pr_debug("Deleting %s\n", perf_evsel__name(evsel));
> > -			evlist__remove(evlist, evsel);
> > -			evsel__delete(evsel);
> > -		}
> > -	}
> > -}
> > -
> >  static int __cmd_inject(struct perf_inject *inject)
> >  {
> >  	int ret = -EINVAL;
> > @@ -729,8 +677,6 @@ static int __cmd_inject(struct perf_inject *inject)
> >  				evlist__remove(session->evlist, evsel);
> >  				evsel__delete(evsel);
> >  			}
> > -			if (inject->strip)
> > -				strip_fini(inject);
> >  		}
> >  		session->header.data_offset = output_data_offset;
> >  		session->header.data_size = inject->bytes_written;
> > -- 
> > 2.17.1
> > 

-- 

- Arnaldo