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authorTodd E Brandt <todd.e.brandt@linux.intel.com>2014-06-06 05:40:17 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-06-07 00:18:07 +0200
commitbb3632c6101b2fad07e6246721466b984b1e0e9d (patch)
tree1f5755a94c7dfe2b2051411e0f08620b398a9059 /drivers/acpi/sleep.c
parent3eba148d75670f61463dd3c9ef8672da8f290f36 (diff)
downloadlinux-bb3632c6101b2fad07e6246721466b984b1e0e9d.tar.bz2
PM / sleep: trace events for suspend/resume
Adds trace events that give finer resolution into suspend/resume. These events are graphed in the timelines generated by the analyze_suspend.py script. They represent large areas of time consumed that are typical to suspend and resume. The event is triggered by calling the function "trace_suspend_resume" with three arguments: a string (the name of the event to be displayed in the timeline), an integer (case specific number, such as the power state or cpu number), and a boolean (where true is used to denote the start of the timeline event, and false to denote the end). The suspend_resume trace event reproduces the data that the machine_suspend trace event did, so the latter has been removed. Signed-off-by: Todd Brandt <todd.e.brandt@intel.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/sleep.c')
-rw-r--r--drivers/acpi/sleep.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index c11e3795431b..b3e3cc73ba79 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -19,6 +19,7 @@
#include <linux/acpi.h>
#include <linux/module.h>
#include <asm/io.h>
+#include <trace/events/power.h>
#include "internal.h"
#include "sleep.h"
@@ -501,6 +502,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
ACPI_FLUSH_CPU_CACHE();
+ trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true);
switch (acpi_state) {
case ACPI_STATE_S1:
barrier();
@@ -516,6 +518,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
pr_info(PREFIX "Low-level resume complete\n");
break;
}
+ trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false);
/* This violates the spec but is required for bug compatibility. */
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);