Re: [RFC/RFT] [PATCH 02/10] cpufreq: intel_pstate: Conditional frequency invariant accounting

Peter Zijlstra
2018-05-16T15:47:54Z

On Wed, May 16, 2018 at 05:19:25PM +0200, Juri Lelli wrote:

> Anyway, FWIW I started testing this on a E5-2609 v3 and I'm not seeing
> hackbench regressions so far (running with schedutil governor).

https://en.wikipedia.org/wiki/Haswell_(microarchitecture)#Server_processors

Lists the E5 2609 v3 as not having turbo at all, which is basically a
best case scenario for this patch.

As I wrote earlier today; when turbo exists, like say the 2699, then
when we're busy we'll run at U=2.3/3.6 ~ .64, which might confuse
things.