On 06-02-16, 04:40, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > > Instead of using a per-CPU deferrable timer for queuing up governor > work items, register a utilization update callback that will be > invoked from the scheduler on utilization changes. > > The sampling rate is still the same as what was used for the > deferrable timers and the added irq_work overhead should be offset by > the eliminated timers overhead, so in theory the functional impact of > this patch should not be significant. > > Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > --- > > Updated after the recent discussion with Viresh. > > Changes from v3: > - The completion used for irq_work synchronization replaced with > irq_work_sync() > in gov_cancel_work(). > - update_sampling_rate() now modifies shared->sample_delay_ns for all CPUs > where it matters directly with a big fat comment explaining why this is > actually OK. > - The above means the time_stamp field in struct cpu_common_dbs_info is not > necessary any more, so it is dropped. > - A build error for !CONFIG_SMP is addressed (hopefully effectively). > > This version was lightly tested on an x86 laptop.
Awesome work Rafael, this looks really good now. Acked-by: Viresh Kumar <viresh.ku...@linaro.org> -- viresh