From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: [PATCH 1/4] opp: add dev_pm_opp_is_turbo() helper Date: Wed, 29 Jul 2015 16:26:22 +0530 Message-ID: <20150729105622.GA5100@linux> References: <20150728142713.GB17745@amd> <20150729102435.GB9584@linux> <20150729105347.GA23865@amd> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20150729105347.GA23865@amd> Sender: linux-kernel-owner@vger.kernel.org To: Pavel Machek Cc: Rafael Wysocki , linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, b.zolnierkie@samsung.com, nm@ti.com, sboyd@codeaurora.org, Tomasz Figa , Michael Turquette , Javier Martinez Canillas , Thomas Abraham , Greg Kroah-Hartman , Len Brown , open list List-Id: linux-pm@vger.kernel.org On 29-07-15, 12:53, Pavel Machek wrote: > So any combination of normal OPPs can be sustained for arbitrary time > within the temperature range? Maybe not. That's why we user thermal framework to sense such situations and react accordingly. > And as soon as any turbo OPP is enabled, we produce more heat than > TDP? But yeah, this will cross all limits. Shall generate more heat or may consume lots of power for very small benefit in performance. And so very short duration bursts of this are used by very few platforms. -- viresh