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authorRafael J. Wysocki <rjw@sisk.pl>2012-04-29 22:52:52 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2012-05-01 21:25:11 +0200
commit30e3ce6dcbe3fc29c343b17e768b07d4a795de21 (patch)
tree42af32f901aab0c9cbca0dc22f755f9fe3936d67 /drivers/base/power/sysfs.c
parent60af1066913162c5dd13fad3b872a67b1eb7da0f (diff)
PM / Sleep: Change wakeup source statistics to follow Android
Wakeup statistics used by Android are slightly different from what we have in wakeup sources at the moment and there aren't any known users of those statistics other than Android, so modify them to make it easier for Android to switch to wakeup sources. This removes the struct wakeup_source's hit_cout field, which is very rough and therefore not very useful, and adds two new fields, wakeup_count and expire_count. The first one tracks how many times the wakeup source is activated with events_check_enabled set (which roughly corresponds to the situations when a system power transition to a sleep state is in progress and would be aborted by this wakeup source if it were the only active one at that time) and the second one is the number of times the wakeup source has been activated with a timeout that expired. Additionally, the last_time field is now updated when the wakeup source is deactivated too (previously it was only updated during the wakeup source's activation), which seems to be what Android does with the analogous counter for wakelocks. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/power/sysfs.c')
-rw-r--r--drivers/base/power/sysfs.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 95c12f6cb5b9..13e40b9021b9 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -314,22 +314,41 @@ static ssize_t wakeup_active_count_show(struct device *dev,
static DEVICE_ATTR(wakeup_active_count, 0444, wakeup_active_count_show, NULL);
-static ssize_t wakeup_hit_count_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t wakeup_abort_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ unsigned long count = 0;
+ bool enabled = false;
+
+ spin_lock_irq(&dev->power.lock);
+ if (dev->power.wakeup) {
+ count = dev->power.wakeup->wakeup_count;
+ enabled = true;
+ }
+ spin_unlock_irq(&dev->power.lock);
+ return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+}
+
+static DEVICE_ATTR(wakeup_abort_count, 0444, wakeup_abort_count_show, NULL);
+
+static ssize_t wakeup_expire_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
unsigned long count = 0;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
if (dev->power.wakeup) {
- count = dev->power.wakeup->hit_count;
+ count = dev->power.wakeup->expire_count;
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
}
-static DEVICE_ATTR(wakeup_hit_count, 0444, wakeup_hit_count_show, NULL);
+static DEVICE_ATTR(wakeup_expire_count, 0444, wakeup_expire_count_show, NULL);
static ssize_t wakeup_active_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -486,7 +505,8 @@ static struct attribute *wakeup_attrs[] = {
&dev_attr_wakeup.attr,
&dev_attr_wakeup_count.attr,
&dev_attr_wakeup_active_count.attr,
- &dev_attr_wakeup_hit_count.attr,
+ &dev_attr_wakeup_abort_count.attr,
+ &dev_attr_wakeup_expire_count.attr,
&dev_attr_wakeup_active.attr,
&dev_attr_wakeup_total_time_ms.attr,
&dev_attr_wakeup_max_time_ms.attr,