Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755690Ab3DZOl0 (ORCPT ); Fri, 26 Apr 2013 10:41:26 -0400 Received: from sema.semaphore.gr ([78.46.194.137]:48409 "EHLO sema.semaphore.gr" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751991Ab3DZOlY (ORCPT ); Fri, 26 Apr 2013 10:41:24 -0400 Message-ID: <517A920E.3000705@semaphore.gr> Date: Fri, 26 Apr 2013 17:41:18 +0300 From: Stratos Karafotis User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130402 Thunderbird/17.0.5 MIME-Version: 1.0 To: Viresh Kumar , "Rafael J. Wysocki" CC: cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 linux-next] cpufreq: ondemand: Calculate gradient of CPU load to early increase frequency References: <3060957.HxB12olH3c@vostro.rjw.lan> <515CBB98.4020607@semaphore.gr> <515F2AF3.9050709@semaphore.gr> <51644855.1090300@semaphore.gr> In-Reply-To: <51644855.1090300@semaphore.gr> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1364 Lines: 50 On 04/09/2013 07:56 PM, Stratos Karafotis wrote: > On 04/05/2013 10:50 PM, Stratos Karafotis wrote: >> Hi Viresh, >> >> On 04/04/2013 07:54 AM, Viresh Kumar wrote: >>> Hi Stratos, >>> >>> Yes, your results show some improvements. BUT if performance is the >>> only thing >>> we were looking for, then we will never use ondemand governor but >>> performance >>> governor. >>> >>> I suspect this little increase in performance must have increased >>> power numbers >>> too (significantly). So, if you can get numbers in the form of >>> power/performance >>> with and without your patch, it will be great. >>> >>> -- >>> viresh >>> >> >> I run some more tests. I increased the number of iterations to 100 >> (from 20). >> I also test for counter 1,000,000 (~4200us), 5,000,000 (~10000us), >> 15,000,000 (~30000us). >> >> This time, I also extracted statistics from cpufreq_stats driver. I >> think this will be an >> indication for power consumption. Below the results and attached the >> program I used for to >> get these numbers. > > Any comments would be appreciated. > > Thanks, > Stratos > > Ping. Thanks, Stratos -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/