linux-kernel - [PATCH 16/24] perf daemon: Use control to stop session

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Message-Id: <20210208200908.1019149-17-jolsa@kernel.org>
Date:   Mon,  8 Feb 2021 21:09:00 +0100
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Alexei Budankov <abudankov@...wei.com>
Subject: [PATCH 16/24] perf daemon: Use control to stop session

Using 'stop' control command to stop perf record session.
If that fails, falling back to current SIGTERM/SIGKILL pair.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-daemon.c | 56 ++++++++++++++++++++++++++++++-------
 1 file changed, 46 insertions(+), 10 deletions(-)

diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
index 17ab8f9021ca..11f9fac4cf12 100644
--- a/tools/perf/builtin-daemon.c
+++ b/tools/perf/builtin-daemon.c
@@ -871,11 +871,25 @@ 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)
@@ -900,13 +914,35 @@ 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)
-- 
2.29.2