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Wysocki" , "Peter Zijlstra (Intel)" , Ramesh Thomas , Daniel Lezcano , Vincent Guittot , linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 0/2] Optimization CPU idle state impacted by tick Message-ID: <20180807143805.GB6785@leoy-ThinkPad-X240s> References: <1533652024-19078-1-git-send-email-leo.yan@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1533652024-19078-1-git-send-email-leo.yan@linaro.org> User-Agent: Mutt/1.10+31 (9cdd884) (2018-06-19) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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