On Monday, August 26, 2019 11:40:58 AM CEST Peter Zijlstra wrote:
> On Mon, Aug 26, 2019 at 11:10:52AM +0200, Rafael J. Wysocki wrote:
> > On Wednesday, August 7, 2019 5:33:40 PM CEST Douglas RAILLARD wrote:
> > > Fast switching path only emits an event for the CPU of interest, whereas
> > > the
>
On 26/08/2019 13:24, Peter Zijlstra wrote:
> On Mon, Aug 26, 2019 at 11:51:17AM +0200, Dietmar Eggemann wrote:
>
>> Not sure about the extra 'if trace_cpu_frequency_enabled()' but I guess
>> it doesn't hurt.
>
> Without that you do that for_each_cpu() iteration unconditionally, even
> if the tra
On Mon, Aug 26, 2019 at 11:51:17AM +0200, Dietmar Eggemann wrote:
> Not sure about the extra 'if trace_cpu_frequency_enabled()' but I guess
> it doesn't hurt.
Without that you do that for_each_cpu() iteration unconditionally, even
if the tracepoint is disabled.
On 26/08/2019 11:40, Peter Zijlstra wrote:
> On Mon, Aug 26, 2019 at 11:10:52AM +0200, Rafael J. Wysocki wrote:
>> On Wednesday, August 7, 2019 5:33:40 PM CEST Douglas RAILLARD wrote:
>>> Fast switching path only emits an event for the CPU of interest, whereas the
>>> regular path emits an event fo
On Mon, Aug 26, 2019 at 11:10:52AM +0200, Rafael J. Wysocki wrote:
> On Wednesday, August 7, 2019 5:33:40 PM CEST Douglas RAILLARD wrote:
> > Fast switching path only emits an event for the CPU of interest, whereas the
> > regular path emits an event for all the CPUs that had their frequency
> > c
On Wednesday, August 7, 2019 5:33:40 PM CEST Douglas RAILLARD wrote:
> Fast switching path only emits an event for the CPU of interest, whereas the
> regular path emits an event for all the CPUs that had their frequency changed,
> i.e. all the CPUs sharing the same policy.
>
> With the current beh
Hi Rafael,
On 8/7/19 9:40 PM, Rafael J. Wysocki wrote:
On Wed, Aug 7, 2019 at 5:34 PM Douglas RAILLARD
wrote:
Fast switching path only emits an event for the CPU of interest, whereas the
regular path emits an event for all the CPUs that had their frequency changed,
i.e. all the CPUs sharing t
On Wed, Aug 7, 2019 at 5:34 PM Douglas RAILLARD
wrote:
>
> Fast switching path only emits an event for the CPU of interest, whereas the
> regular path emits an event for all the CPUs that had their frequency changed,
> i.e. all the CPUs sharing the same policy.
>
> With the current behavior, looki
Fast switching path only emits an event for the CPU of interest, whereas the
regular path emits an event for all the CPUs that had their frequency changed,
i.e. all the CPUs sharing the same policy.
With the current behavior, looking at cpu_frequency event for a given CPU that
is using the fast sw
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