linux-kernel - [PATCH 16/22] perf daemon: Add up time for daemon/session list

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Date:   Sat,  2 Jan 2021 23:04:35 +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>,
        Stephane Eranian <eranian@...gle.com>,
        Alexei Budankov <abudankov@...wei.com>
Subject: [PATCH 16/22] perf daemon: Add up time for daemon/session list

Display up time for both daemon and sessions.

Example:

  # cat ~/.perfconfig
  [daemon]
  base=/opt/perfdata

  [session-cycles]
  run = -m 10M -e cycles --overwrite --switch-output -a

  [session-sched]
  run = -m 20M -e sched:* --overwrite --switch-output -a

Starting the daemon:

  # perf daemon start

Get the details with up time:

  # perf daemon -v
  [778315:daemon] base: /opt/perfdata
    output:  /opt/perfdata/output
    lock:    /opt/perfdata/lock
    up:      15 minutes
  [778316:cycles] perf record -m 20M -e cycles --overwrite --switch-output -a
    base:    /opt/perfdata/session-cycles
    output:  /opt/perfdata/session-cycles/output
    control: /opt/perfdata/session-cycles/control
    ack:     /opt/perfdata/session-cycles/ack
    up:      10 minutes
  [778317:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
    base:    /opt/perfdata/session-sched
    output:  /opt/perfdata/session-sched/output
    control: /opt/perfdata/session-sched/control
    ack:     /opt/perfdata/session-sched/ack
    up:      2 minutes

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-daemon.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
index e45a1acaad18..d99aee2a59da 100644
--- a/tools/perf/builtin-daemon.c
+++ b/tools/perf/builtin-daemon.c
@@ -24,6 +24,7 @@
 #include <fcntl.h>
 #include <sys/inotify.h>
 #include <libgen.h>
+#include <time.h>
 #include "builtin.h"
 #include "perf.h"
 #include "debug.h"
@@ -52,6 +53,7 @@ struct session {
 	int			 pid;
 	struct list_head	 list;
 	enum session_state	 state;
+	time_t			 start;
 };
 
 struct daemon {
@@ -64,6 +66,7 @@ struct daemon {
 	FILE			*out;
 	char			 perf[PATH_MAX];
 	int			 signal_fd;
+	time_t			 start;
 };
 
 static struct daemon __daemon = {
@@ -255,6 +258,8 @@ static int session__run(struct session *session, struct daemon *daemon)
 		return -1;
 	}
 
+	session->start = time(NULL);
+
 	session->pid = fork();
 	if (session->pid < 0)
 		return -1;
@@ -690,6 +695,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 {
 	char csv_sep = cmd->list.csv_sep;
 	struct session *session;
+	time_t curr = time(NULL);
 
 	if (csv_sep) {
 		fprintf(out, "%d%c%s%c%s%c%s/%s",
@@ -704,6 +710,10 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 			/* lock */
 			csv_sep, daemon->base, "lock");
 
+		fprintf(out, "%c%lu",
+			/* session up time */
+			csv_sep, (curr - daemon->start) / 60);
+
 		fprintf(out, "\n");
 	} else {
 		fprintf(out, "[%d:daemon] base: %s\n", getpid(), daemon->base);
@@ -712,6 +722,8 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 				daemon->base, SESSION_OUTPUT);
 			fprintf(out, "  lock:    %s/lock\n",
 				daemon->base);
+			fprintf(out, "  up:      %lu minutes\n",
+				(curr - daemon->start) / 60);
 		}
 	}
 
@@ -737,6 +749,10 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 				/* session ack */
 				csv_sep, session->base, SESSION_ACK);
 
+			fprintf(out, "%c%lu",
+				/* session up time */
+				csv_sep, (curr - session->start) / 60);
+
 			fprintf(out, "\n");
 		} else {
 			fprintf(out, "[%d:%s] perf record %s\n",
@@ -751,6 +767,8 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 				session->base, SESSION_CONTROL);
 			fprintf(out, "  ack:     %s/%s\n",
 				session->base, SESSION_ACK);
+			fprintf(out, "  up:      %lu minutes\n",
+				(curr - session->start) / 60);
 		}
 	}
 
@@ -1072,6 +1090,8 @@ static int __cmd_start(struct daemon *daemon, struct option parent_options[],
 	if (argc)
 		usage_with_options(daemon_usage, start_options);
 
+	daemon->start = time(NULL);
+
 	if (setup_config(daemon)) {
 		pr_err("failed: config not found\n");
 		return -1;
-- 
2.26.2