perf cgroup: Add evlist__add_default_cgroup()

tip:perf/core tip-bot for Arnaldo Carvalho de Melo 1 participant 1 message Mar 9, 2018 perf events

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2018-03-09 08:39 UTC #0 lore raw

Commit-ID:  483322dda03a7ad807e82f9c25fac315a4eee1c5
Gitweb:     https://git.kernel.org/tip/483322dda03a7ad807e82f9c25fac315a4eee1c5
Author:     Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Tue, 6 Mar 2018 15:48:10 -0300
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Wed, 7 Mar 2018 10:22:26 -0300

perf cgroup: Add evlist__add_default_cgroup()

So that tools like 'perf trace' can allow the user to set a cgroup to be used for all the evsels still without a crgroup setup by parse_cgroups(), such as the one to use for the syscalls, vfs_getname and other events involved in strace like syscall tracing.

Cc Adrian Hunter <[email protected]>

Cc David Ahern <[email protected]>

Cc Jiri Olsa <[email protected]>

Cc Namhyung Kim <[email protected]>

Cc Stephane Eranian <[email protected]>

Cc Wang Nan <[email protected]>

Link https://lkml.kernel.org/n/[email protected] open here

Signed-off-by Arnaldo Carvalho de Melo <[email protected]>

---
 tools/perf/util/cgroup.c | 14 ++++++++++++++
 tools/perf/util/cgroup.h |  2 ++
 2 files changed, 16 insertions(+)

tools/perf/util/cgroup.c +14 -0

index 6fd33ffc2488..d8cd0e601c56 100644
@@ -182,6 +182,20 @@ struct cgroup *cgroup__get(struct cgroup *cgroup)
        return cgroup;
 }
 
+static void evsel__set_default_cgroup(struct perf_evsel *evsel, struct cgroup *cgroup)
+{
+	if (evsel->cgrp == NULL)
+		evsel->cgrp = cgroup__get(cgroup);
+}
+
+void evlist__set_default_cgroup(struct perf_evlist *evlist, struct cgroup *cgroup)
+{
+	struct perf_evsel *evsel;
+
+	evlist__for_each_entry(evlist, evsel)
+		evsel__set_default_cgroup(evsel, cgroup);
+}
+
 int parse_cgroups(const struct option *opt, const char *str,
 		  int unset __maybe_unused)
 {

tools/perf/util/cgroup.h +2 -0

index 0e377e6340dd..b213f5e9a3ed 100644
@@ -22,6 +22,8 @@ struct perf_evlist;
 
 struct cgroup *evlist__findnew_cgroup(struct perf_evlist *evlist, char *name);
 
+void evlist__set_default_cgroup(struct perf_evlist *evlist, struct cgroup *cgroup);
+
 int parse_cgroups(const struct option *opt, const char *str, int unset);
 
 #endif /* __CGROUP_H__ */