applied.
thanks,
-Len
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of
>Dominik Brodowski
>Sent: Monday, June 19, 2006 5:29 PM
>To: Thomas Gleixner; Brown, Len
>Cc: Con Kolivas; Ingo Molnar; LKML; Andrew Morton; john stultz
>Subject: [1/4] ACPI C-States: accounting of sleep states
>
>Track the actual time spent in C-States (C2 upwards, we can't
>determine this for C1), not only the number of invocations. This is
>especially useful for dynamic ticks / "tickless systems", but is also
>of interest on normal systems, as any interrupt activity leads to
>C-States being exited, not only the timer interrupt.
>
>The time is being measured in PM timer ticks, so an increase
>by one equals
>279 nanoseconds.
>
>Signed-off-by: Dominik Brodowski <[email protected]>
>
>---
>
> drivers/acpi/processor_idle.c | 10 ++++++----
> include/acpi/processor.h | 1 +
> 2 files changed, 7 insertions(+), 4 deletions(-)
>
>3997a08ff5aa0553dfff81801c3690a5c91ac7bc
>diff --git a/drivers/acpi/processor_idle.c
>b/drivers/acpi/processor_idle.c
>index 80fa434..4f166fa 100644
>--- a/drivers/acpi/processor_idle.c
>+++ b/drivers/acpi/processor_idle.c
>@@ -322,8 +322,6 @@ static void acpi_processor_idle(void)
> cx = &pr->power.states[ACPI_STATE_C1];
> #endif
>
>- cx->usage++;
>-
> /*
> * Sleep:
> * ------
>@@ -421,6 +419,9 @@ static void acpi_processor_idle(void)
> local_irq_enable();
> return;
> }
>+ cx->usage++;
>+ if ((cx->type != ACPI_STATE_C1) && (sleep_ticks > 0))
>+ cx->time += sleep_ticks;
>
> next_state = pr->power.state;
>
>@@ -1055,9 +1056,10 @@ static int acpi_processor_power_seq_show
> else
> seq_puts(seq, "demotion[--] ");
>
>- seq_printf(seq, "latency[%03d] usage[%08d]\n",
>+ seq_printf(seq, "latency[%03d] usage[%08d]
>duration[%020llu]\n",
> pr->power.states[i].latency,
>- pr->power.states[i].usage);
>+ pr->power.states[i].usage,
>+ pr->power.states[i].time);
> }
>
> end:
>diff --git a/include/acpi/processor.h b/include/acpi/processor.h
>index badf027..ca0e031 100644
>--- a/include/acpi/processor.h
>+++ b/include/acpi/processor.h
>@@ -51,6 +51,7 @@ struct acpi_processor_cx {
> u32 latency_ticks;
> u32 power;
> u32 usage;
>+ u64 time;
> struct acpi_processor_cx_policy promotion;
> struct acpi_processor_cx_policy demotion;
> };
>--
>1.2.4
>
>-
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