From: Mark Lord Subject: Re: [GIT PULL] Ext3 latency fixes Date: Tue, 07 Apr 2009 09:31:37 -0400 Message-ID: <49DB55B9.7030108@rtr.ca> References: <1238742067-30814-1-git-send-email-tytso@mit.edu> <20090404135719.GA9812@mit.edu> <20090404151649.GE5178@kernel.dk> <20090404173412.GF5178@kernel.dk> <20090404201820.GA18067@elte.hu> <20090406215034.GD3797@csclub.uwaterloo.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Ingo Molnar , Jens Axboe , Linus Torvalds , Theodore Tso , Linux Kernel Developers List , Ext4 Developers List To: Lennart Sorensen Return-path: Received: from rtr.ca ([76.10.145.34]:59395 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752154AbZDGNbj (ORCPT ); Tue, 7 Apr 2009 09:31:39 -0400 In-Reply-To: <20090406215034.GD3797@csclub.uwaterloo.ca> Sender: linux-ext4-owner@vger.kernel.org List-ID: Lennart Sorensen wrote: > On Sat, Apr 04, 2009 at 10:18:20PM +0200, Ingo Molnar wrote: >> btw., just to insert some hard data: usability studies place the >> acceptance threshold for delays to around 300 milliseconds. >> >> If the computer does not 'respond' (in a real or a fake, visible or >> audible way) to their input within 0.3 seconds they get annoyed >> emotionally. > > You mean like hitting 'skip commercial' on the remote, and 2 minutes later > when the commercials are almost over, then it happens. Yeah users get a > bit peeved at that. Fortunately that particularly behaviour is somewhat > rare. 5 to 10 seconds is more common and sometimes it works fine. .. I generally don't see any delay at all when doing that, even when the Mythtv system is very busy on multiple recordings. But then, I also don't use the huge LIRC stack for the simple R/C either. cheers