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([2a01:e34:ed2f:f020:79c2:dbff:63d2:c1f9]) by smtp.googlemail.com with ESMTPSA id u21sm4264042wmu.27.2019.11.06.10.27.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 06 Nov 2019 10:27:48 -0800 (PST) Subject: Re: [PATCH V6 1/3] cpuidle: play_idle: Make play_idle more flexible From: Daniel Lezcano To: rjw@rjwysocki.net Cc: mathieu.poirier@linaro.org, mingo@redhat.com, peterz@infradead.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org References: <20191030075141.1039-1-daniel.lezcano@linaro.org> Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; prefer-encrypt=mutual; keydata= mQINBFv/yykBEADDdW8RZu7iZILSf3zxq5y8YdaeyZjI/MaqgnvG/c3WjFaunoTMspeusiFE sXvtg3ehTOoyD0oFjKkHaia1Zpa1m/gnNdT/WvTveLfGA1gH+yGes2Sr53Ht8hWYZFYMZc8V 2pbSKh8wepq4g8r5YI1XUy9YbcTdj5mVrTklyGWA49NOeJz2QbfytMT3DJmk40LqwK6CCSU0 9Ed8n0a+vevmQoRZJEd3Y1qXn2XHys0F6OHCC+VLENqNNZXdZE9E+b3FFW0lk49oLTzLRNIq 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6zzkvSnnsyohHW6AOchOVNjTHhFhFYn36TuV53laydaXK/zgo3NsOpATFObyK3N5lhb1G9tN Lrev/4WVxNr0LPXl9bdCbQGzIQK+kAPcg8u9f2MMhHQiQX8FAjhP3wtACRhfUz9RaQykxiwv y0s5uI05ZSXhqFs9iLlh3zNU1i6J1cdzA8BReoa3cKz4UiGKEffT857iMvT/ZmgSdYY57EgV UWm57SN2ok2Ii8AXlanH5SJPkbwJZhiB7kO0cjebmoA/1SA+5yTc3zEKKFuxcpfiXxt0d/OJ om6jCJ5/uKB5Cz9bJj0WdlvS2Xb11Jrs90MoVa74H5me4jOw7m9Yyg3qExOFOXUPFL6N Message-ID: Date: Wed, 6 Nov 2019 19:27:47 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20191030075141.1039-1-daniel.lezcano@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rafael, On 30/10/2019 08:51, Daniel Lezcano wrote: > The play_idle function has two users, the intel powerclamp and the > idle_injection. > > The idle injection cooling device uses the function via the > idle_injection powercap's APIs. Unfortunately, play_idle is currently > limited by the idle state depth: by default the deepest idle state is > selected. On the ARM[64] platforms, most of the time it is the cluster > idle state, the exit latency and the residency can be very high. That > reduces the scope of the idle injection usage because the impact on > the performances can be very significant. > > If the idle injection cycles can be done with a shallow state like a > retention state, the cooling effect would eventually give similar > results than the cpufreq cooling device. > > In order to prepare the function to receive an idle state parameter, > let's replace the 'use_deepest_state' boolean field with 'use_state' > and use this value to enter the specific idle state. > > The current code keeps the default behavior which is go to the deepest > idle state. > > Signed-off-by: Daniel Lezcano > Acked-by: Mathieu Poirier > Reviewed-by: Ulf Hansson Is it possible to merge this series so I can make some progress on upstreaming the idle cooling device which depends on these three patches? Thanks -- Daniel -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog