[2/2] PM-runtime: update time accounting only when enabled
diff mbox series

Message ID 1549297553-17647-3-git-send-email-vincent.guittot@linaro.org
State Accepted
Delegated to: Geert Uytterhoeven
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Series
  • PM-runtime: fix and clean up of time accounting
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Commit Message

Vincent Guittot Feb. 4, 2019, 4:25 p.m. UTC
Update accounting_timestamp field only when PM runtime is enable
and don't forget to account the last state before disabling it.

Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
 drivers/base/power/runtime.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Comments

Ulf Hansson Feb. 5, 2019, 8:09 a.m. UTC | #1
On Mon, 4 Feb 2019 at 17:26, Vincent Guittot <vincent.guittot@linaro.org> wrote:
>
> Update accounting_timestamp field only when PM runtime is enable
> and don't forget to account the last state before disabling it.
>
> Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>

Kind regards
Uffe


> ---
>  drivers/base/power/runtime.c | 18 ++++++++++--------
>  1 file changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
> index 50740da..ed62cca 100644
> --- a/drivers/base/power/runtime.c
> +++ b/drivers/base/power/runtime.c
> @@ -66,11 +66,14 @@ static int rpm_suspend(struct device *dev, int rpmflags);
>   */
>  void update_pm_runtime_accounting(struct device *dev)
>  {
> -       u64 now = ktime_get_mono_fast_ns();
> -       u64 last = dev->power.accounting_timestamp;
> -       u64 delta;
> +       u64 now, last, delta;
>
> -       dev->power.accounting_timestamp = now;
> +       if (dev->power.disable_depth > 0)
> +               return;
> +
> +       last = dev->power.accounting_timestamp;
> +
> +       dev->power.accounting_timestamp = now = ktime_get_mono_fast_ns();
>
>         /*
>          * Because ktime_get_mono_fast_ns() is not monotonic during
> @@ -82,9 +85,6 @@ void update_pm_runtime_accounting(struct device *dev)
>
>         delta = now - last;
>
> -       if (dev->power.disable_depth > 0)
> -               return;
> -
>         if (dev->power.runtime_status == RPM_SUSPENDED)
>                 dev->power.suspended_time += delta;
>         else
> @@ -1298,6 +1298,9 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
>                 pm_runtime_put_noidle(dev);
>         }
>
> +       /* Update time accounting before disabling pm runtime */
> +       update_pm_runtime_accounting(dev);
> +
>         if (!dev->power.disable_depth++)
>                 __pm_runtime_barrier(dev);
>
> @@ -1521,7 +1524,6 @@ void pm_runtime_init(struct device *dev)
>         dev->power.request_pending = false;
>         dev->power.request = RPM_REQ_NONE;
>         dev->power.deferred_resume = false;
> -       dev->power.accounting_timestamp = 0;
>         INIT_WORK(&dev->power.work, pm_runtime_work);
>
>         dev->power.timer_expires = 0;
> --
> 2.7.4
>

Patch
diff mbox series

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 50740da..ed62cca 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -66,11 +66,14 @@  static int rpm_suspend(struct device *dev, int rpmflags);
  */
 void update_pm_runtime_accounting(struct device *dev)
 {
-	u64 now = ktime_get_mono_fast_ns();
-	u64 last = dev->power.accounting_timestamp;
-	u64 delta;
+	u64 now, last, delta;
 
-	dev->power.accounting_timestamp = now;
+	if (dev->power.disable_depth > 0)
+		return;
+
+	last = dev->power.accounting_timestamp;
+
+	dev->power.accounting_timestamp = now = ktime_get_mono_fast_ns();
 
 	/*
 	 * Because ktime_get_mono_fast_ns() is not monotonic during
@@ -82,9 +85,6 @@  void update_pm_runtime_accounting(struct device *dev)
 
 	delta = now - last;
 
-	if (dev->power.disable_depth > 0)
-		return;
-
 	if (dev->power.runtime_status == RPM_SUSPENDED)
 		dev->power.suspended_time += delta;
 	else
@@ -1298,6 +1298,9 @@  void __pm_runtime_disable(struct device *dev, bool check_resume)
 		pm_runtime_put_noidle(dev);
 	}
 
+	/* Update time accounting before disabling pm runtime */
+	update_pm_runtime_accounting(dev);
+
 	if (!dev->power.disable_depth++)
 		__pm_runtime_barrier(dev);
 
@@ -1521,7 +1524,6 @@  void pm_runtime_init(struct device *dev)
 	dev->power.request_pending = false;
 	dev->power.request = RPM_REQ_NONE;
 	dev->power.deferred_resume = false;
-	dev->power.accounting_timestamp = 0;
 	INIT_WORK(&dev->power.work, pm_runtime_work);
 
 	dev->power.timer_expires = 0;