From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stratos Karafotis Subject: Re: [PATCH v3 linux-next] cpufreq: ondemand: Calculate gradient of CPU load to early increase frequency Date: Tue, 02 Apr 2013 18:49:14 +0300 Message-ID: <515AFDFA.8090108@semaphore.gr> References: <51253715.7080600@semaphore.gr> <51561556.7020904@semaphore.gr> <1544183.cq3KaqH8x3@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from sema.semaphore.gr ([78.46.194.137]:56108 "EHLO sema.semaphore.gr" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1760123Ab3DBPtT (ORCPT ); Tue, 2 Apr 2013 11:49:19 -0400 In-Reply-To: <1544183.cq3KaqH8x3@vostro.rjw.lan> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: "Rafael J. Wysocki" Cc: Viresh Kumar , cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org On 04/02/2013 04:50 PM, Rafael J. Wysocki wrote: > Do you have any numbers indicating that this actually makes things better? > > Rafael No, I don't. The expected behaviour after this patch is to "force" max frequency few sampling periods earlier. The idea was to increase system responsiveness especially on 'small' embedded systems (phones for example). Actually, I thought to provide some numbers but I had no idea how to measure this. Would it be enough to provide the number of times that the CPU increases frequency because of early_demand versus the total number of increments? Thanks, Stratos