From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org, rafael@kernel.org,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
nicolas.pitre@linaro.org, vincent.guittot@linaro.org
Subject: Re: [RFC PATCH 2/2] sched: idle: IRQ based next prediction for idle period
Date: Tue, 12 Jan 2016 15:16:44 +0100 [thread overview]
Message-ID: <56950ACC.4090001@linaro.org> (raw)
In-Reply-To: <alpine.DEB.2.11.1601121441330.3575@nanos>
On 01/12/2016 02:42 PM, Thomas Gleixner wrote:
> On Tue, 12 Jan 2016, Daniel Lezcano wrote:
>> On 01/08/2016 04:43 PM, Thomas Gleixner wrote:
>>>> + /*
>>>> + * Register the setup/free irq callbacks, so new interrupt or
>>>> + * freed interrupt will update their tracking.
>>>> + */
>>>> + ret = register_irq_timings(&irqt_ops);
>>>> + if (ret) {
>>>> + pr_err("Failed to register timings ops\n");
>>>> + return ret;
>>>> + }
>>>
>>> So that stuff is installed unconditionally. Is it used unconditionally as
>>> well?
>>
>> Sorry, I am not sure to understand your question. If the kernel is compiled
>> with CONFIG_CPU_IDLE_GOV_SCHED=y, this code is enabled and use the irq
>> timings. The condition comes from the compilation option.
>
> The question is whether the option also activates that thing or is there still
> some /sys/whatever/idlegov magic where you can (de)select it.
Yes, in the next patches of the series I did not send, we can switch to
the cpuidle's governor framework or idle-sched. I will look at how to
disable it when switching to the cpuidle's governors.
Thanks
-- Daniel
--
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next prev parent reply other threads:[~2016-01-12 14:16 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-06 15:22 [RFC PATCH 0/2] IRQ based next prediction Daniel Lezcano
2016-01-06 15:22 ` [RFC PATCH 1/2] irq: Add a framework to measure interrupt timings Daniel Lezcano
2016-01-08 15:31 ` Thomas Gleixner
2016-01-12 11:42 ` Daniel Lezcano
2016-01-06 15:22 ` [RFC PATCH 2/2] sched: idle: IRQ based next prediction for idle period Daniel Lezcano
2016-01-06 17:40 ` Nicolas Pitre
2016-01-07 15:42 ` Daniel Lezcano
2016-01-12 19:27 ` Nicolas Pitre
2016-01-10 22:37 ` Daniel Lezcano
2016-01-10 22:46 ` Nicolas Pitre
2016-01-10 22:58 ` Daniel Lezcano
2016-01-10 23:13 ` Nicolas Pitre
2016-01-08 15:43 ` Thomas Gleixner
2016-01-12 12:41 ` Daniel Lezcano
2016-01-12 13:42 ` Thomas Gleixner
2016-01-12 14:16 ` Daniel Lezcano [this message]
2016-01-12 14:26 ` Thomas Gleixner
2016-01-12 14:52 ` Daniel Lezcano
2016-01-12 15:12 ` Thomas Gleixner
2016-01-12 16:04 ` Daniel Lezcano
2016-01-13 9:17 ` Thomas Gleixner
2016-01-18 13:21 ` Daniel Lezcano
2016-01-20 15:41 ` Thomas Gleixner
2016-01-20 16:00 ` [RFC V2 0/2] IRQ based next prediction Daniel Lezcano
2016-01-20 16:00 ` [RFC V2 1/2] irq: Add a framework to measure interrupt timings Daniel Lezcano
2016-01-20 17:55 ` Thomas Gleixner
2016-01-21 9:25 ` Daniel Lezcano
2016-01-21 10:27 ` Thomas Gleixner
2016-01-20 19:07 ` Peter Zijlstra
2016-01-20 19:57 ` Thomas Gleixner
2016-01-20 20:04 ` Nicolas Pitre
2016-01-20 20:20 ` Peter Zijlstra
2016-01-20 20:22 ` Thomas Gleixner
2016-01-21 9:50 ` Daniel Lezcano
2016-01-21 10:08 ` Peter Zijlstra
2016-01-21 12:38 ` Daniel Lezcano
2016-01-21 20:27 ` Thomas Gleixner
2016-01-21 13:52 ` Thomas Gleixner
2016-01-21 14:19 ` Daniel Lezcano
2016-01-21 18:56 ` Thomas Gleixner
2016-01-22 10:15 ` Peter Zijlstra
2016-01-21 9:26 ` Daniel Lezcano
2016-01-20 19:28 ` Peter Zijlstra
2016-01-21 9:53 ` Daniel Lezcano
2016-01-20 16:00 ` [RFC V2 2/2] sched: idle: IRQ based next prediction for idle period Daniel Lezcano
2016-01-20 17:46 ` Nicolas Pitre
2016-01-20 18:44 ` Peter Zijlstra
2016-01-21 10:03 ` Daniel Lezcano
2016-01-20 19:02 ` Peter Zijlstra
2016-01-20 19:17 ` Nicolas Pitre
2016-01-20 19:29 ` Peter Zijlstra
2016-01-20 19:34 ` Peter Zijlstra
2016-01-20 19:40 ` Peter Zijlstra
2016-01-20 19:57 ` Nicolas Pitre
2016-01-20 20:22 ` Peter Zijlstra
2016-01-20 19:49 ` Thomas Gleixner
2016-01-21 13:54 ` Daniel Lezcano
2016-01-21 14:12 ` Thomas Gleixner
2016-01-20 16:00 ` [RFC V2 0/2] IRQ based next prediction Daniel Lezcano
2016-01-20 16:00 ` [RFC V2 1/2] irq: Add a framework to measure interrupt timings Daniel Lezcano
2016-01-20 16:00 ` [RFC V2 2/2] sched: idle: IRQ based next prediction for idle period Daniel Lezcano
2016-01-20 20:14 ` Nicolas Pitre
2016-01-21 13:04 ` Daniel Lezcano
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