On Wed, May 18, 2016 at 11:11:51PM +0200, Rafael J. Wysocki wrote: > On Wed, May 18, 2016 at 2:53 PM, Shilpasri G Bhat > <shilpa.b...@linux.vnet.ibm.com> wrote: > > This patch adds driver callback for fast_switch and below observations > > on schedutil governor are done with this patch. > > > > In POWER8 there is a regression observed with schedutil compared to > > ondemand. With schedutil the frequency is not ramping down and is > > mostly stuck at max frequency during idle . This is because of the > > watchdog timer, an RT task which is fired every 4 seconds which > > results in requesting max frequency. > > Well, yes, that would be problematic. >
Right; we need to come up with something for RT tasks; but what happens if you disable the watchdog? This should be entirely doable and might give a better comparison.
