perf daemon: Use control to stop session

Use the 'stop' control command to stop perf record session.  If that
fails, fall back to current SIGTERM/SIGKILL pair.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-17-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
index fac8605..c36f521 100644 (file)
--- a/tools/perf/builtin-daemon.c
+++ b/tools/perf/builtin-daemon.c
@@ -870,11 +870,25 @@ static int setup_client_socket(struct daemon *daemon)
 static void daemon_session__kill(struct daemon_session *session,
                                 struct daemon *daemon)
 {
-       daemon_session__signal(session, SIGTERM);
-       if (daemon_session__wait(session, daemon, 10)) {
-               daemon_session__signal(session, SIGKILL);
-               daemon_session__wait(session, daemon, 10);
-       }
+       int how = 0;
+
+       do {
+               switch (how) {
+               case 0:
+                       daemon_session__control(session, "stop", false);
+                       break;
+               case 1:
+                       daemon_session__signal(session, SIGTERM);
+                       break;
+               case 2:
+                       daemon_session__signal(session, SIGKILL);
+                       break;
+               default:
+                       break;
+               }
+               how++;
+
+       } while (daemon_session__wait(session, daemon, 10));
 }
 
 static void daemon__signal(struct daemon *daemon, int sig)
@@ -899,13 +913,35 @@ static void daemon_session__remove(struct daemon_session *session)
        daemon_session__delete(session);
 }
 
+static void daemon__stop(struct daemon *daemon)
+{
+       struct daemon_session *session;
+
+       list_for_each_entry(session, &daemon->sessions, list)
+               daemon_session__control(session, "stop", false);
+}
+
 static void daemon__kill(struct daemon *daemon)
 {
-       daemon__signal(daemon, SIGTERM);
-       if (daemon__wait(daemon, 10)) {
-               daemon__signal(daemon, SIGKILL);
-               daemon__wait(daemon, 10);
-       }
+       int how = 0;
+
+       do {
+               switch (how) {
+               case 0:
+                       daemon__stop(daemon);
+                       break;
+               case 1:
+                       daemon__signal(daemon, SIGTERM);
+                       break;
+               case 2:
+                       daemon__signal(daemon, SIGKILL);
+                       break;
+               default:
+                       break;
+               }
+               how++;
+
+       } while (daemon__wait(daemon, 10));
 }
 
 static void daemon__exit(struct daemon *daemon)