From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: schedule_timeout sleeps too long after dividing CPU frequency Date: Fri, 15 May 2015 10:37:31 +0530 Message-ID: <20150515050731.GH6348@linux> References: <555218C7.5050602@free.fr> <20150512155004.GP2067@n2100.arm.linux.org.uk> <555380F8.5050306@free.fr> <5554858A.9010207@free.fr> <20150514115456.GB23999@linux> <55549DEE.6010202@free.fr> <5554B5C1.2070402@free.fr> <20150515041632.GG6348@linux> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20150515041632.GG6348@linux> Sender: cpufreq-owner@vger.kernel.org To: Mason Cc: Russell King - ARM Linux , Daniel Lezcano , "Rafael J. Wysocki" , Mans Rullgard , Linux ARM , Linux PM , cpufreq List-Id: linux-pm@vger.kernel.org On 15-05-15, 09:46, Viresh Kumar wrote: > The logic is this: > - Oneshot mode is only useful if we are going to support NO_HZ mode. > i.e. we can disable the clkevt device during CPU idle .. Minor correction. The last line talks about NO_HZ_IDLE instead. NO_HZ is about disabling to tick when not required. -- viresh From mboxrd@z Thu Jan 1 00:00:00 1970 From: viresh.kumar@linaro.org (Viresh Kumar) Date: Fri, 15 May 2015 10:37:31 +0530 Subject: schedule_timeout sleeps too long after dividing CPU frequency In-Reply-To: <20150515041632.GG6348@linux> References: <555218C7.5050602@free.fr> <20150512155004.GP2067@n2100.arm.linux.org.uk> <555380F8.5050306@free.fr> <5554858A.9010207@free.fr> <20150514115456.GB23999@linux> <55549DEE.6010202@free.fr> <5554B5C1.2070402@free.fr> <20150515041632.GG6348@linux> Message-ID: <20150515050731.GH6348@linux> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 15-05-15, 09:46, Viresh Kumar wrote: > The logic is this: > - Oneshot mode is only useful if we are going to support NO_HZ mode. > i.e. we can disable the clkevt device during CPU idle .. Minor correction. The last line talks about NO_HZ_IDLE instead. NO_HZ is about disabling to tick when not required. -- viresh