Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965253Ab3DPSed (ORCPT ); Tue, 16 Apr 2013 14:34:33 -0400 Received: from sema.semaphore.gr ([78.46.194.137]:49307 "EHLO sema.semaphore.gr" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S964943Ab3DPSea (ORCPT ); Tue, 16 Apr 2013 14:34:30 -0400 Message-ID: <516D99AD.4070104@semaphore.gr> Date: Tue, 16 Apr 2013 21:34:21 +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: "Rafael J. Wysocki" CC: Viresh Kumar , 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: 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: 1835 Lines: 62 On 04/10/2013 06:22 AM, Viresh Kumar wrote: > On 9 April 2013 22:26, 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. > > Sorry, i forgot about this mail earlier.. > > Your performance numbers look improved but i am still not sure about > power consumption. But as this is not going to be the default settings, i > think we can take this patch. > > @Rafael:? > Hi Rafael, I'm sorry for bothering you again for this patch. Are these number adequate? Should I provide more benchmark results? Thanks for your time. 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/