Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755784Ab2JFNUL (ORCPT ); Sat, 6 Oct 2012 09:20:11 -0400 Received: from smtp.getmail.no ([84.208.15.66]:52025 "EHLO smtp.getmail.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750965Ab2JFNUH (ORCPT ); Sat, 6 Oct 2012 09:20:07 -0400 MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes To: david@lang.hm Subject: Re: Minimal jitter = good desktop. References: Date: Sat, 06 Oct 2012 15:19:58 +0200 Cc: linux-kernel@vger.kernel.org From: Uwaysi Bin Kareem Message-id: In-reply-to: User-Agent: Opera Mail/12.02 (Linux) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2172 Lines: 57 In the context of os-jitter, delay/latency is measured as jitter. Peace Be With You. On Sat, 06 Oct 2012 03:06:57 +0200, wrote: > less jitter != less latency > > you could (in theory) eliminate jitter by delaying every keypress > processed for exactly 1 second by having the code paths that process > keypresses faster insert delays before implementing the results. > > that would result in zero jitter, but horrific latency. > > latency is how long it takes to do something, jitter is how much the > latency varies. > > normally, if you optimize for one you make the other worse. > > If you optimize for latency, you try to finish everything as soon as you > can. Since some things take longer than others, jitter increases. > > David Lang > > On Sat, 6 Oct 2012, Uwaysi Bin Kareem wrote: > >> Reducing jitter seems central for many things. >> First of all keypresses seem faster. (less jitter = less latency). >> Doom 3 and similar jittersensitive OpenGL applications run smoothly, >> and better than windows. Doom 3 was also my main app to get running >> well, and measuring jitter in the signalpath of OpenGL improved the >> overall computing experience. >> >> Even youtube videos who are not synced to refresh, with a refresh of >> 60, and a videofps of 30, runs quite well. >> http://paradoxuncreated.com/Blog/wordpress/?p=3221 >> >> System is responsive, and I have only had one problem, and that is >> packing seems not to work at the moment. >> >> For a fast test in Ubuntu, try >> http://paradoxuncreated.com/Blog/wordpress/?p=2268 >> >> Definately a recommended config on the desktop. >> >> Peace Be With You. >> -- >> 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/ -- 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/