On Sat, 2016-04-09 at 14:31 +0200, Rafael J. Wysocki wrote: > On Sat, Apr 9, 2016 at 1:07 PM, Peter Zijlstra <pet...@infradead.org> > wrote: > > On Fri, Apr 08, 2016 at 10:59:59PM +0200, Rafael J. Wysocki wrote: > > > On Friday, April 08, 2016 08:50:54 AM Mike Galbraith wrote: > > > > On Fri, 2016-04-08 at 08:45 +0200, Peter Zijlstra wrote: > > > > > > > > > Cute, I thought you used governor=performance for your runs? > > > > > > > > I do, and those numbers are with it thus set. > > > > > > Well, this is a trade-off. > > > > > > 4.5 introduced a power regression here so this one goes back to > > > the previous > > > state of things. > > > > Just for my elucidation; how can gov=performance have a 'power' > > regression? > > Because of what is used as the "default" idle state most of the time. > > C1 was used before 4.5 and that changed to polling in 4.5.
Should the default idle state not then be governor dependent? When I set gov=performance, I'm expecting box to go just as fast as it can go without melting. Does polling risk CPU -> lava conversion? -Mike