Messages in this thread Patch in this message | | | Subject | Patch for tracing c states (power_end) on x86 | From | Robert Schöne <> | Date | Wed, 24 Feb 2010 09:19:33 +0100 |
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Hello,
Since noone replied to my last mail (Febr. 15th, 11:42), describing the way to fix the missing c-state tracing, here's a patch. Maybe its easier that way.
(I used the perf-fixes-for-linus git tree to obtain a more-then-up-to-date version)
Bye Robert
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 02d6780..b1cfb88 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -384,6 +384,7 @@ void default_idle(void) else local_irq_enable(); current_thread_info()->status |= TS_POLLING; + trace_power_end(1); } else { local_irq_enable(); /* loop is done by the caller */ @@ -451,6 +452,7 @@ void mwait_idle_with_hints(unsigned long ax, unsigned long cx) if (!need_resched()) __mwait(ax, cx); } + trace_power_end((ax>>4)+1); } /* Default MONITOR/MWAIT with no hints, used for default C1 state */ @@ -467,6 +469,7 @@ static void mwait_idle(void) __sti_mwait(0, 0); else local_irq_enable(); + trace_power_end(1); } else local_irq_enable(); }
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