Messages in this thread |  | | Date | Wed, 15 Apr 2015 14:42:46 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 1/3] cpuidle: Store the idle start time stamp |
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On Wed, Apr 15, 2015 at 02:29:06PM +0200, Daniel Lezcano wrote: > On 04/15/2015 12:20 PM, Peter Zijlstra wrote: > >On Wed, Apr 15, 2015 at 12:00:22PM +0200, Daniel Lezcano wrote: > >>+ target_state->idle_stamp = ktime_to_us(ktime_get()); > > > >ktime_get_ns(); > > > > Hmm, sounds like I missed we are dealing with different units (us / ns) in > cpuidle / sched. > > Would it make sense to store the time into a ktime structure instead and use > the relevant function depending on the place we are inspecting the value > from ?
Why would you ever want to use us? Does ARM enjoy calculating /1000?
Ah, I see the !scalar ktime got whacked, good! At which point the u64 ns and ktime are the same. That said I prefer the u64 over ktime because its easier to manipulate.
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