Re: [PATCH 00/28] PM: QoS: Get rid of unuseful code and rework CPU latency QoS interface

From: Francisco Jerez
Date: Fri Feb 21 2020 - 17:11:04 EST

"Rafael J. Wysocki" <rafael@xxxxxxxxxx> writes:

> On Thu, Feb 13, 2020 at 9:09 AM Francisco Jerez <currojerez@xxxxxxxxxx> wrote:
>> "Rafael J. Wysocki" <rafael@xxxxxxxxxx> writes:
>> > On Thu, Feb 13, 2020 at 1:16 AM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
>> >>
>> >> On Thu, Feb 13, 2020 at 12:31 AM Francisco Jerez <currojerez@xxxxxxxxxx> wrote:
>> >> >
> [cut]
>> >
>> > And BTW, posting patches as RFC is fine even if they have not been
>> > tested. At least you let people know that you work on something this
>> > way, so if they work on changes in the same area, they may take that
>> > into consideration.
>> >
>> Sure, that was going to be the first RFC.
>> > Also if there are objections to your proposal, you may save quite a
>> > bit of time by sending it early.
>> >
>> > It is unfortunate that this series has clashed with the changes that
>> > you were about to propose, but in this particular case in my view it
>> > is better to clean up things and start over.
>> >
>> Luckily it doesn't clash with the second RFC I was meaning to send,
>> maybe we should just skip the first?
> Yes, please.
>> Or maybe it's valuable as a curiosity anyway?
> No, let's just focus on the latest one.
> Thanks!

We don't seem to have reached much of an agreement on the general
direction of RFC2, so I can't really get started with it. Here is RFC1
for the record:

Specifically the following patch conflicts with this series:

Series improves performance-per-watt of GfxBench gl_4 (AKA Car Chase) by
over 15% on my system with the branch above, actual FPS "only" improves
about 5.9% on ICL laptop due to it being very lightly TDP-bound with its
rather huge TDP. The performance of almost every graphics benchmark
I've tried improves significantly with it (a number of SynMark
test-cases are improved by around 40% in perf-per-watt, Egypt
perf-per-watt improves by about 25%).

Hopefully we can come up with some alternative plan of action.

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