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authorArnaldo Carvalho de Melo <acme@redhat.com>2018-03-06 21:27:08 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-03-07 16:22:26 +0300
commit69239ec81d596c57e0cf2d2f26cfe92e8cbd0929 (patch)
tree78c50a1d1a414a8571e49c830ab8cbe4862d6ae0 /tools/perf/util/cgroup.c
parent4b5ea3bd674f707180b0e8c4f514d30e49f293b3 (diff)
downloadlinux-69239ec81d596c57e0cf2d2f26cfe92e8cbd0929.tar.xz
perf cgroup: Add evlist__findnew_cgroup()
Similar to machine__findnew_thread(), etc, i.e. try to find, get a refcount if found and return it, otherwise return a new cgroup object. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-im1omevlihhyneiic4nl3g24@git.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.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 26a837037797..6fd33ffc2488 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -128,18 +128,21 @@ out_err:
return NULL;
}
+struct cgroup *evlist__findnew_cgroup(struct perf_evlist *evlist, char *name)
+{
+ struct cgroup *cgroup = evlist__find_cgroup(evlist, name);
+
+ return cgroup ?: cgroup__new(name);
+}
+
static int add_cgroup(struct perf_evlist *evlist, char *str)
{
struct perf_evsel *counter;
- struct cgroup *cgrp = evlist__find_cgroup(evlist, str);
+ struct cgroup *cgrp = evlist__findnew_cgroup(evlist, str);
int n;
- if (!cgrp) {
- cgrp = cgroup__new(str);
- if (!cgrp)
- return -1;
- }
-
+ if (!cgrp)
+ return -1;
/*
* find corresponding event
* if add cgroup N, then need to find event N