Hello Rafael, On Sun, Feb 07, 2016 at 03:50:31PM +0100, 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.
I tested this patch series (including v5 of PATCH 3) on POWER with Viresh's CPUFreq test suite. I didn't see any issues with the patchset except for a lockdep splat involving "s_active" and "od_dbs_cdata.mutex", which was also observed on 4.5-rc3 and which was fixed by Viresh's recent patches. With a kernbench run, there were no regression when compared to 4.5-rc3. FWIW, Tested-by: Gautham R. Shenoy <e...@linux.vnet.ibm.com> > > Thanks, > Rafael -- Thanks and Regards gautham.
