From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932109AbWFXDom (ORCPT ); Fri, 23 Jun 2006 23:44:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932173AbWFXDol (ORCPT ); Fri, 23 Jun 2006 23:44:41 -0400 Received: from ug-out-1314.google.com ([66.249.92.169]:20321 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S932109AbWFXDol (ORCPT ); Fri, 23 Jun 2006 23:44:41 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=c2GL3y/J2UoddsvSfVjBwKuEUtcPXba+Ta32O0eAs0Z63+/lAFdMG+4Ks7K3mVN1TKedJfdWn3ElFA3AuFWMMENr2yzwvEpOquaF5jnW89byHLuDxZ3qwpmRfroQzY8AMSqoS46yJm7RwCPHfacu02GS/CkzcnT56Gg+90n2K2E= Message-ID: <1e1a7e1b0606232044x11136be5p332716b757ecd537@mail.gmail.com> Date: Sat, 24 Jun 2006 13:44:39 +1000 From: James To: "Jens Axboe" Subject: Re: [PATCH] fcache: a remapping boot cache Cc: linux-kernel@vger.kernel.org, ck@vds.kolivas.org In-Reply-To: <20060531061234.GC29535@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20060515091806.GA4110@suse.de> <20060515101019.GA4068@suse.de> <20060516074628.GA16317@suse.de> <4d8e3fd30605301438k457f6242x1df64df9bab7f8f1@mail.gmail.com> <20060531061234.GC29535@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Set this up on my laptop yesterday with some awesome results. I'm using 2.6.17-ck1 which has v2.1. Heres some bootcharts, before, after, and a prime run. http://archlinux.org/~james/normal.png http://archlinux.org/~james/fs-fcache.png http://archlinux.org/~james/fs-fcache-prime.png Repeated boots show about the same 6 second improvement, 32 down to 26 seconds. Looking at the slowdowns in the fs-fcache run, most are due to cpu load, waiting on network or, modprobe, and not disk access. X now starts nearly instantaneously. As an experiment, I primed my cache right through to logging into my desktop environment. It was so effective, that now when I login, the GNOME splash screen only flickers onto the screen briefly, and the panels appear almost instantly. This is a big improvment over without fcache, where you'd see each component of GNOME being loaded on the splash screen, nautilus, metacity, and the panels would take quite a bit of time to render and load all their applets. Impressive work, I hope to see it broadened to other filesystems, improved and merged to vanilla soon because it has clear improvements. James -- iphitus - Beyond Maintainer, Arch Trusted User, Arch Developer. Home:iphitus.loudas.com