Messages in this thread | | | Subject | Re: Patch for tracing c states (power_end) on x86 | From | Peter Zijlstra <> | Date | Thu, 25 Feb 2010 13:52:00 +0100 |
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On Wed, 2010-02-24 at 09:19 +0100, Robert Schöne wrote: > 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)
Arjan, any comments?, you seem skilled with this power stuff ;-)
> 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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