linux-kernel - Re: [PATCH 4/4] perf test: Add expand cgroup event test

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Message-ID: <CAM9d7cjJ2Gk_SK_=evG99fYqU5c_E=CBy43nDt+my_v8_T+oJA@mail.gmail.com>
Date:   Mon, 21 Sep 2020 14:49:10 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        John Garry <john.garry@...wei.com>
Subject: Re: [PATCH 4/4] perf test: Add expand cgroup event test

On Fri, Sep 18, 2020 at 10:52 PM Jiri Olsa <jolsa@...hat.com> wrote:
>
> On Wed, Sep 16, 2020 at 03:31:29PM +0900, Namhyung Kim wrote:
>
> SNIP
>
> > +++ b/tools/perf/tests/tests.h
> > @@ -123,6 +123,7 @@ const char *test__pfm_subtest_get_desc(int subtest);
> >  int test__pfm_subtest_get_nr(void);
> >  int test__parse_metric(struct test *test, int subtest);
> >  int test__pe_file_parsing(struct test *test, int subtest);
> > +int test__expand_cgroup_events(struct test *test, int subtest);
> >
> >  bool test__bp_signal_is_supported(void);
> >  bool test__bp_account_is_supported(void);
> > diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
> > index a1bf345a770b..eeffa08251b5 100644
> > --- a/tools/perf/util/cgroup.c
> > +++ b/tools/perf/util/cgroup.c
> > @@ -52,7 +52,7 @@ static struct cgroup *evlist__find_cgroup(struct evlist *evlist, const char *str
> >       return NULL;
> >  }
>
>
> could you please put the do_open change below into separate patch?

Ok, will do.

Thanks
Namhyung

> >
> > -static struct cgroup *cgroup__new(const char *name)
> > +static struct cgroup *cgroup__new(const char *name, bool do_open)
> >  {
> >       struct cgroup *cgroup = zalloc(sizeof(*cgroup));
> >
> > @@ -62,9 +62,14 @@ static struct cgroup *cgroup__new(const char *name)
> >               cgroup->name = strdup(name);
> >               if (!cgroup->name)
> >                       goto out_err;
> > -             cgroup->fd = open_cgroup(name);
> > -             if (cgroup->fd == -1)
> > -                     goto out_free_name;
> > +
> > +             if (do_open) {
> > +                     cgroup->fd = open_cgroup(name);
> > +                     if (cgroup->fd == -1)
> > +                             goto out_free_name;
> > +             } else {
> > +                     cgroup->fd = -1;
> > +             }
> >       }
> >
> >       return cgroup;
> > @@ -80,7 +85,7 @@ struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name)
> >  {
> >       struct cgroup *cgroup = evlist__find_cgroup(evlist, name);
> >
> > -     return cgroup ?: cgroup__new(name);
> > +     return cgroup ?: cgroup__new(name, true);
> >  }
> >
> >  static int add_cgroup(struct evlist *evlist, const char *str)
> > @@ -202,7 +207,7 @@ int parse_cgroups(const struct option *opt, const char *str,
> >  }
> >
> >  int evlist__expand_cgroup(struct evlist *evlist, const char *str,
> > -                       struct rblist *metric_events)
> > +                       struct rblist *metric_events, bool open_cgroup)
> >  {
> >       struct evlist *orig_list, *tmp_list;
> >       struct evsel *pos, *evsel, *leader;
> > @@ -240,7 +245,7 @@ int evlist__expand_cgroup(struct evlist *evlist, const char *str,
> >                       if (!name)
> >                               break;
> >
> > -                     cgrp = cgroup__new(name);
> > +                     cgrp = cgroup__new(name, open_cgroup);
> >                       free(name);
> >                       if (cgrp == NULL)
> >                               break;
> > diff --git a/tools/perf/util/cgroup.h b/tools/perf/util/cgroup.h
> > index eea6df8ee373..162906f3412a 100644
> > --- a/tools/perf/util/cgroup.h
> > +++ b/tools/perf/util/cgroup.h
> > @@ -26,7 +26,7 @@ struct rblist;
> >
> >  struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
> >  int evlist__expand_cgroup(struct evlist *evlist, const char *cgroups,
> > -                       struct rblist *metric_events);
> > +                       struct rblist *metric_events, bool open_cgroup);
> >
> >  void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
> >
> > --
> > 2.28.0.618.gf4bc123cb7-goog
> >
>