From: Todd E Brandt <todd.e.brandt@linux.intel.com>
To: linux-pm@vger.kernel.org
Subject: [PATCH] new suspend_resume trace event for console resume
Date: Fri, 19 Sep 2014 14:07:12 -0700 [thread overview]
Message-ID: <20140919210711.GA15652@linux.intel.com> (raw)
This patch adds another suspend_resume trace event for analyze_suspend
to capture. The resume_console call can take several hundred milliseconds
if the printk buffer is full of debug info. The tool will now inform
testers of the wasted time and encourage them to disable it in
production builds.
Signed-off-by: Todd Brandt <todd.e.brandt@intel.com>
----
kernel/power/suspend.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 18c6219..e837dd6 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -361,7 +361,9 @@ int suspend_devices_and_enter(suspend_state_t state)
suspend_test_start();
dpm_resume_end(PMSG_RESUME);
suspend_test_finish("resume devices");
+ trace_suspend_resume(TPS("resume_console"), state, true);
resume_console();
+ trace_suspend_resume(TPS("resume_console"), state, false);
Close:
platform_suspend_end(state);
next reply other threads:[~2014-09-19 21:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 21:07 Todd E Brandt [this message]
2014-09-22 14:04 ` [PATCH] new suspend_resume trace event for console resume Rafael J. Wysocki
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