Re: [PATCH 6/7] mm: parallelize deferred_init_memmap()

[Daniel Jordan]

On Tue, May 05, 2020 at 07:55:43AM -0700, Alexander Duyck wrote:
> One question about this data. What is the power management
> configuration on the systems when you are running these tests? I'm
> just curious if CPU frequency scaling, C states, and turbo are
> enabled?

Yes, intel_pstate is loaded in active mode without hwp and with turbo enabled
(those power management docs are great by the way!) and intel_idle is in use
too.

> I ask because that is what I have seen usually make the
> difference in these kind of workloads as the throughput starts
> dropping off as you start seeing the core frequency lower and more
> cores become active.

If I follow, you're saying there's a chance performance would improve with the
above disabled, but how often would a system be configured that way?  Even if
it were faster, the machine is configured how it's configured, or am I missing
your point?