lkml.org 
[lkml]   [2014]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v9 03/10] sched: remove frequency scaling from cpu_capacity
On Mon, Nov 03, 2014 at 04:54:40PM +0000, Vincent Guittot wrote:
> Now that arch_scale_cpu_capacity has been introduced to scale the original
> capacity, the arch_scale_freq_capacity is no longer used (it was
> previously used by ARM arch). Remove arch_scale_freq_capacity from the
> computation of cpu_capacity. The frequency invariance will be handled in the
> load tracking and not in the CPU capacity.

Just a note:

Yes, we are scaling the load tracking of each task to compensate for
frequency scaling. I think that is all fine. Later we will have to feed
the current frequency into the energy model as well to figure out if
putting more tasks on a cpu will/should cause the frequency to increase
or not. We don't need it for now and don't need to add it in the commit
message. It is just a reminder that we may actually want to use
arch_scale_freq_capacity() combined with cpu_capacity to provide this
input to the energy model later.


\
 
 \ /
  Last update: 2014-11-21 14:01    [W:0.129 / U:17.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site