Re: [regression] cross core scheduling frequency drop bisected to 0c313cb20732

Mike Galbraith
2016-04-09T07:27:33Z

On Sat, 2016-04-09 at 00:17 -0700, Doug Smythies wrote:

> I still didn't find the exact same program, but I think I found some
> earlier version of the correct test.
>
> I get (long term average):
> Kernel 4.4.0-17: Powersave 3.93 usecs/loop ; Performance 3.93 usecs/loop 0.89
> Kernel 4.5-rc7: Powersave 3.47 usecs/loop ; Performance 3.51 usecs/loop 1.00
> Kernel 4.6-rc1: Powersave 3.84 usecs/loop ; Performance 3.88 usecs/loop 0.90
>
> So, similar results (so far, I didn't try reverted yet).

I likely see a bit more go missing because I throttle no_hz when idle
is being hammered at high frequency.

-Mike