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authorArnaldo Carvalho de Melo <acme@redhat.com>2017-12-01 11:44:30 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-12-05 10:24:32 -0300
commit8d3cd4c3d3ab5f4f9edd5c593b7743f7fbd3526d (patch)
tree9998d115faf80cc0cd0c29e7a6dd3bc31cba7d34 /tools/perf/util/thread_map.c
parentb984aff7811bbac75b3f05931643d815067cf45c (diff)
downloadop-kernel-dev-8d3cd4c3d3ab5f4f9edd5c593b7743f7fbd3526d.zip
op-kernel-dev-8d3cd4c3d3ab5f4f9edd5c593b7743f7fbd3526d.tar.gz
perf thread_map: Add method to map all threads in the system
Reusing the thread_map__new_by_uid() proc scanning already in place to return a map with all threads in the system. Based-on-a-patch-by: Jin Yao <yao.jin@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/n/tip-khh28q0wwqbqtrk32bfe07hd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/thread_map.c')
-rw-r--r--tools/perf/util/thread_map.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index be0d5a7..2b65385 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -92,7 +92,7 @@ struct thread_map *thread_map__new_by_tid(pid_t tid)
return threads;
}
-struct thread_map *thread_map__new_by_uid(uid_t uid)
+static struct thread_map *__thread_map__new_all_cpus(uid_t uid)
{
DIR *proc;
int max_threads = 32, items, i;
@@ -113,7 +113,6 @@ struct thread_map *thread_map__new_by_uid(uid_t uid)
while ((dirent = readdir(proc)) != NULL) {
char *end;
bool grow = false;
- struct stat st;
pid_t pid = strtol(dirent->d_name, &end, 10);
if (*end) /* only interested in proper numerical dirents */
@@ -121,11 +120,12 @@ struct thread_map *thread_map__new_by_uid(uid_t uid)
snprintf(path, sizeof(path), "/proc/%s", dirent->d_name);
- if (stat(path, &st) != 0)
- continue;
+ if (uid != UINT_MAX) {
+ struct stat st;
- if (st.st_uid != uid)
- continue;
+ if (stat(path, &st) != 0 || st.st_uid != uid)
+ continue;
+ }
snprintf(path, sizeof(path), "/proc/%d/task", pid);
items = scandir(path, &namelist, filter, NULL);
@@ -178,6 +178,16 @@ out_free_closedir:
goto out_closedir;
}
+struct thread_map *thread_map__new_all_cpus(void)
+{
+ return __thread_map__new_all_cpus(UINT_MAX);
+}
+
+struct thread_map *thread_map__new_by_uid(uid_t uid)
+{
+ return __thread_map__new_all_cpus(uid);
+}
+
struct thread_map *thread_map__new(pid_t pid, pid_t tid, uid_t uid)
{
if (pid != -1)
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