lkml.org 
[lkml]   [2018]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v6 04/14] PM / EM: Expose the Energy Model in sysfs
From
Date
On 08/20/2018 02:44 AM, Quentin Perret wrote:
> Expose the Energy Model (read-only) of all performance domains in sysfs
> for convenience. To do so, add a kobject to the CPU subsystem under the
> umbrella of which a kobject for each performance domain is attached.
>
> The resulting hierarchy is as follows for a platform with two
> performance domains for example:
>
> /sys/devices/system/cpu/energy_model
> ├── pd0
> │   ├── cost
> │   ├── cpus
> │   ├── frequency
> │   └── power

cpus (cpumask of the perf domain), frequency (OPP's of the perf domain)
and power (values at those OPP's) are somehow easy to grasp, cost is
definitely not.

You have this nice description in em_pd_energy() what cost actually is.
IMHO, might be worth repeating this at least in the patch header here.

[...]

\
 
 \ /
  Last update: 2018-09-06 08:57    [W:0.277 / U:0.940 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site