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 1RdlDR-0000dO-9G for garchives@archives.gentoo.org; Thu, 22 Dec 2011 16:09:57 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id A616021C13A; Thu, 22 Dec 2011 16:09:48 +0000 (UTC) Received: from mail-ey0-f181.google.com (mail-ey0-f181.google.com [209.85.215.181]) by pigeon.gentoo.org (Postfix) with ESMTP id 22D1F21C036 for ; Thu, 22 Dec 2011 16:09:16 +0000 (UTC) Received: by eaai1 with SMTP id i1so2761458eaa.40 for ; Thu, 22 Dec 2011 08:09:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=CWvS6VzZSvLY1Sl4nA7Ny1nXFBR/1DW+7EiCfcJrEHE=; b=rFJXvMlaFdwhkOn+CZ/RSjoAGt9AsG5I4x3cdxC1Kga+b0LwULNBzMqmIhs44dR+wF 6Y8796WYU7031n1XhGtCGjOSf4/3e5W55JlFzV5oKqTu54pJYANBSe23BXL2IUlJiy1b XhhQsgToKiIgyVhGDPfaM6iEhxJsqwd8UI/N8= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 Received: by 10.204.136.193 with SMTP id s1mr3343982bkt.111.1324570156239; Thu, 22 Dec 2011 08:09:16 -0800 (PST) Sender: freemanrich@gmail.com Received: by 10.204.19.1 with HTTP; Thu, 22 Dec 2011 08:09:16 -0800 (PST) In-Reply-To: <20111222165518.6cd251d9@pomiocik.lan> References: <20111222044323.GA18095@comet.roc.mn.charter.com> <20111222165518.6cd251d9@pomiocik.lan> Date: Thu, 22 Dec 2011 11:09:16 -0500 X-Google-Sender-Auth: VjZmWbvzBZLzYDTql2W2oAqvToc Message-ID: Subject: Re: [gentoo-dev] Six month major project on Gentoo From: Rich Freeman To: gentoo-dev@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: 729fbdca-af2a-473f-b640-023f9fda9205 X-Archives-Hash: 2370b967aaddab2585806db0fceac27a On Thu, Dec 22, 2011 at 10:55 AM, Micha=C5=82 G=C3=B3rny wrote: >> Just wanted to point out that (if there is enough memory) recent >> kernels manage much better parallelism, even excess of it, once >> reached the maximum load augmenting threads only bring minimal loss of >> "real" time. > > Does that include handling complete lack of memory and heavy swapping? > I think the key was the "if there is enough memory" - which I think is a pretty big issue. Running 25 invocations of java each wanting 100-200MB of RAM will cripple a system relatively quickly. And 25 really is just scratching the surface when most people think "cluster." I think the only way to really fix this would be to integrate distributed behavior into make itself. Rich