linux-kernel - Re: [PATCH v1 0/2] Optimization CPU idle state impacted by tick

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Message-ID: <20180807143805.GB6785@leoy-ThinkPad-X240s>
Date:   Tue, 7 Aug 2018 22:38:05 +0800
From:   leo.yan@...aro.org
To:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ramesh Thomas <ramesh.thomas@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 0/2] Optimization CPU idle state impacted by tick

On Tue, Aug 07, 2018 at 10:27:02PM +0800, Leo Yan wrote:
> After Rafael's patch series 'sched/cpuidle: Idle loop rework' has been
> merged in mainline kernel, it perfectly resolved the Powernightmares
> issue [1] with not stopping the tick during the idle loop; we verified
> this patch series on Arm platform (96boards Hikey620 with octa CA53
> CPUs) with the rt-app [2] program to generate workloads: a single task
> with below combinded configurations with period 5ms and duty cycle
> 1%/3%/5%/10%/20%/30%/40%.

Oops, I missed the two reference links, for complete info so list here:

[1] https://tu-dresden.de/zih/forschung/ressourcen/dateien/projekte/haec/powernightmares.pdf?lang=en
[2] https://git.linaro.org/power/rt-app.git

Thanks,
Leo Yan