Messages in this thread | | | Date | Tue, 4 Mar 2008 18:30:32 +0100 | From | Pierre Ossman <> | Subject | Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors |
| |
On Tue, 4 Mar 2008 18:29:18 +0100 Andi Kleen <andi@firstfloor.org> wrote:
> > So for now, I'm back to thinking that measuring the interval between deep sleeps is the better approach. I could use some ideas for a good clock source though. I haven't dug much deeper than jiffies when it comes to kernel timekeeping. > > jiffies should work, you just need to make sure you measure them at the > right place. In particular there is some code in dyntick that catches > up on jiffies after the deep sleep when the normal timer handler didn't run > and jiffies are only usable again after that code executed. >
And how can I tell if this handler has run? Not that it really matters I guess, as I don't think running it from the cpuidle governor is very sane.
-- -- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org
| |