From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1QCdh3-0005kD-6P for garchives@archives.gentoo.org; Wed, 20 Apr 2011 20:08:09 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0A51C1C0D0; Wed, 20 Apr 2011 20:06:40 +0000 (UTC) Received: from mail-ww0-f53.google.com (mail-ww0-f53.google.com [74.125.82.53]) by pigeon.gentoo.org (Postfix) with ESMTP id AD3EF1C0D0 for ; Wed, 20 Apr 2011 20:06:40 +0000 (UTC) Received: by wwj40 with SMTP id 40so1210314wwj.10 for ; Wed, 20 Apr 2011 13:06:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:from:to:subject:date:user-agent:references :in-reply-to:mime-version:content-type:content-transfer-encoding :message-id; bh=Mx5u2M/dzfOkU+4EGSIizSM6FazaBJ9/4oued5mzq6g=; b=d5AfcLKBLUfvDp2Xcgvv72GHOKMws1VerGgC40iSMBV+xbGN1vIZauoi9aq8OWJ6M1 Je+ZprsY7Rn15+Q4RsLjaG/nXrjuUsR6zezeLz3sv/ghNhZVYyEYCjWY2pfgv5Ij/zkS /fqnkM9kJlfvtxI+Paia0I57xt/AUBoBCRKeI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:references:in-reply-to:mime-version :content-type:content-transfer-encoding:message-id; b=durSaqdmnjPlrQv1Qana5Uy3LoxFLIjW95iTdqxo0yEDen38mlH83XdEIVuHVd17IJ m/85k8xtitVQ+A8Tp2wgELHDP6NfYRCJDaLpkYiaeLI7XRM2QJYkNYzAU+XzReutEHlB kU1d/74HO1xMyZ4Jw6Rly1SGJ2m1Uo5hiXFyQ= Received: by 10.216.235.158 with SMTP id u30mr790251weq.104.1303329999810; Wed, 20 Apr 2011 13:06:39 -0700 (PDT) Received: from nazgul.localnet (196-215-19-231.dynamic.isadsl.co.za [196.215.19.231]) by mx.google.com with ESMTPS id f30sm633235wef.31.2011.04.20.13.06.36 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 20 Apr 2011 13:06:38 -0700 (PDT) From: Alan McKinnon To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Howzat! Date: Wed, 20 Apr 2011 22:06:09 +0200 User-Agent: KMail/1.13.6 (Linux/2.6.38-ck; KDE/4.6.2; x86_64; ; ) References: <201104180228.59487.peter@humphrey.ukfsn.org> <201104201516.40996.alan.mckinnon@gmail.com> <20110420134214.BA40026C3@data.antarean.org> In-Reply-To: <20110420134214.BA40026C3@data.antarean.org> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201104202206.09302.alan.mckinnon@gmail.com> X-Archives-Salt: X-Archives-Hash: 46f3b11a68bc2054b9f65d4827d0ac14 Apparently, though unproven, at 15:41 on Wednesday 20 April 2011, Joost Roeleveld did opine thusly: > Alan, > > I would love to do a better test then this. > Reason I took Openoffice is because it's known to be a large build > (requires a lot of diskspace) and takes a long time. > > If you know which other ebuilds might make for a better test, I will be > happy to redo the test with those. Completely off the top of my head, I can't think of anything that extensively uses disk space while compiling. There is the configure step, and that hits the disk pretty hard, mostly reads. Building all of KDE would fit the bill for disk IO methinks. However, you will also hit that infernal disk cache issue and render the test useless (it's all in RAM anyway after the first read!). So you would have to disable that. I don't know how to disable disk caching :-( Maybe you can't, the kernel is clearly designed to use the feature if it can at all. Maybe there's a knob in /proc you can twiddle. Any kernel knob experts around? -- alan dot mckinnon at gmail dot com