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From: Valentin Schneider <valentin.schneider@arm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
	Ingo Molnar <mingo@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	linux-kernel@vger.kernel.org,
	Quentin Perret <quentin.perret@arm.com>
Subject: Re: [PATCH] sched/fair: Rearrange select_task_rq_fair() to optimize it
Date: Tue, 24 Apr 2018 12:19:07 +0100	[thread overview]
Message-ID: <0985e709-0d71-2c08-20a9-7bfb618fb5f2@arm.com> (raw)
In-Reply-To: <20180424104304.GE4064@hirez.programming.kicks-ass.net>

On 24/04/18 11:43, Peter Zijlstra wrote:
> On Tue, Apr 24, 2018 at 11:02:26AM +0100, Valentin Schneider wrote:
>> I'd argue making things easier to read is a non-negligible part as well.
> 
> Right, so I don't object to either of these (I think); but it would be
> good to see this in combination with that proposed EAS change.
> 

True, I would've said the call to find_energy_efficient_cpu() ([1]) could
simply be added to the if (sd) {} case, but...

> I think you (valentin) wanted to side-step the entire domain loop in
> that case or something.
> 

...this would change more things. Admittedly I've been sort of out of the loop
(no pun intended) lately, but this doesn't ring a bell. That might have been
the other frenchie (Quentin) :)

> But yes, getting this code more readable is defninitely useful.
> 

[1]: See [RFC PATCH v2 5/6] sched/fair: Select an energy-efficient CPU on task wake-up
@ https://lkml.org/lkml/2018/4/6/856

  reply	other threads:[~2018-04-24 11:19 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-23 10:38 Viresh Kumar
2018-04-24 10:02 ` Valentin Schneider
2018-04-24 10:30   ` Viresh Kumar
2018-04-24 10:43   ` Peter Zijlstra
2018-04-24 11:19     ` Valentin Schneider [this message]
2018-04-24 12:35       ` Peter Zijlstra
2018-04-24 15:46         ` Joel Fernandes
2018-04-24 15:47           ` Joel Fernandes
2018-04-24 22:34             ` Rohit Jain
2018-04-25  2:51               ` Viresh Kumar
2018-04-25 16:48                 ` Rohit Jain
2018-04-25  5:15         ` Viresh Kumar
2018-04-25  8:13           ` Quentin Perret
2018-04-25  9:03             ` Viresh Kumar
2018-04-25  9:39               ` Quentin Perret
2018-04-25 10:13                 ` Viresh Kumar
2018-04-25 10:55                   ` Quentin Perret
2018-04-25  8:12         ` Quentin Perret

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