diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2020-09-24 21:44:54 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-09-28 09:18:06 -0300 |
| commit | 89fb1ca2abb7fba6587a5768cfee9f89daf9be6f (patch) | |
| tree | 9b87501e7b82d97c3542deae1f5b0049738dde00 /tools/perf/util/cgroup.c | |
| parent | b214ba8c4275d66029ad34ad222326dca43e7e26 (diff) | |
perf tools: Allow creation of cgroup without open
This is a preparation for a test case of expanding events for multiple
cgroups. Instead of using real system cgroup, the test will use fake
cgroups so it needs a way to have them without a open file descriptor.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200924124455.336326-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cgroup.c')
| -rw-r--r-- | tools/perf/util/cgroup.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c index 6e64c908fa71..b81324a13a2b 100644 --- a/tools/perf/util/cgroup.c +++ b/tools/perf/util/cgroup.c @@ -51,7 +51,7 @@ static struct cgroup *evlist__find_cgroup(struct evlist *evlist, const char *str return NULL; } -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)); @@ -61,9 +61,14 @@ 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; @@ -79,7 +84,7 @@ 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) @@ -197,7 +202,7 @@ 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) goto out_err; - cgrp = cgroup__new(name); + cgrp = cgroup__new(name, open_cgroup); free(name); if (cgrp == NULL) goto out_err; |