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 <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 77371b3..9dd5b75 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -62,6 +62,7 @@
u32 latency_ticks;
u32 power;
u32 usage;
+ u64 time;
struct acpi_processor_cx_policy promotion;
struct acpi_processor_cx_policy demotion;
};