From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id A45AC1381F3 for ; Thu, 13 Dec 2012 13:03:32 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id C5E8121C086; Thu, 13 Dec 2012 13:03:17 +0000 (UTC) Received: from mail-oa0-f53.google.com (mail-oa0-f53.google.com [209.85.219.53]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 25FBF21C042 for ; Thu, 13 Dec 2012 13:01:56 +0000 (UTC) Received: by mail-oa0-f53.google.com with SMTP id j6so2053481oag.40 for ; Thu, 13 Dec 2012 05:01:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=iW7SkwBry5OizbTuZ5wVQlZcDdehg8hPJXroyGWr6zE=; b=D0+Z1qzTXngngPNOlJrNyslrP97tk3ocaMNe+PhBortwOnYPVXOXwJiexVRFPBrwLz rgModPnndF6Oyba/pp7jzXDqKn9bDwZRNqDEhQ1EhE4yFeo2yTQJb0mcS/3FnVCnBj3w bSNIZlC9rimANIYq+OHFWh8wKux7rYsFKC+H0Dl3vHk33lS8nvY4+ZqxrTKq1fuytVsX TcBXj65yKbbfkDrai8UIffweCWXJZX4Eacr5qhqsQH1uDJqDekal1Td5+dzcsLjqSyp0 AZTnQ7S8/bEJqsUHLHa7HY8Uwb6iR3VeEyKdgjNC59RPkhJ3IXJ+n+cyba/gopz/d/AQ h/kA== Received: by 10.182.152.4 with SMTP id uu4mr1312225obb.85.1355403716310; Thu, 13 Dec 2012 05:01:56 -0800 (PST) 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 Received: by 10.76.83.226 with HTTP; Thu, 13 Dec 2012 05:01:35 -0800 (PST) In-Reply-To: <79c93dd8-3144-4e0b-906b-e46f303641cd@email.android.com> References: <20121213082346.7b6bae37@khamul.example.com> <50C98588.9080409@binarywings.net> <79c93dd8-3144-4e0b-906b-e46f303641cd@email.android.com> From: Luis Gustavo Vilela de Oliveira Date: Thu, 13 Dec 2012 11:01:35 -0200 Message-ID: Subject: Re: [gentoo-user] Dual or Quad CPU complications? To: gentoo-user@lists.gentoo.org Content-Type: multipart/alternative; boundary=f46d0444ece509b7ac04d0bb854b X-Archives-Salt: ecfcf23c-de71-43ed-a1cc-4193c5339122 X-Archives-Hash: 37369583a3282bd6e08397fde069e488 --f46d0444ece509b7ac04d0bb854b Content-Type: text/plain; charset=ISO-8859-1 I believe NUMA is only used on multiprocessor machine and not on only multicore. http://en.wikipedia.org/wiki/Non-Uniform_Memory_Access 2012/12/13 J. Roeleveld > Florian Philipp wrote: >> >> Am 13.12.2012 07:23, schrieb Alan McKinnon: >> >>> >>> On Wed, 12 Dec 2012 22:12:18 -0800 >>> Grant wrote: >>> >>> >>>> I've only ever used systems with a single CPU. I'm looking for a new >>>> host for a dedicated server (suggestions?) and it looks like I'll >>>> probably choose a machine with two or four CPUs. What sort of >>>> complications does that add to set up and/or maintenance with Gentoo? >>> >>> >>> No complication. >>> >>> Configure CONFIG_SMP in the the kernel for multicore. >>> Everything else is transparent. >>> >>> Cores make threads work better, so you'd want to investigate if >>> USE="threads" is >>> useful for you. >> >> >> >> >> I think he's looking for advice on NUMA, not SMP. >> >> > NUMA is also an option in the kernel. Should also be fully transparent. > I got one machine with NUMA and only had to set an option for it. > > Does anyone know how to check it's working properly? > > -- > Joost > -- > Sent from my Android phone with K-9 Mail. Please excuse my brevity. > --f46d0444ece509b7ac04d0bb854b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I believe NUMA is only used on multiprocessor machine and not on only multi= core.



2012/12= /13 J. Roeleveld <joost@antarean.org>
Florian Philipp= <lists@binar= ywings.net> wrote:
Am 13.12.2012 07:23, schrieb Alan McKinnon:


On Wed, 12 Dec 2012 22:12:18 -0800
Grant <emailgrant@gmail.com> wrote:

<=
blockquote class=3D"gmail_quote" style=3D"margin:0pt 0pt 1ex 0.8ex;border-l=
eft:1px solid #ad7fa8;padding-left:1ex">

I've only ever used systems with a single CPU.  I'm looking for a n=
ew
host for a dedicated server (suggestions?) and it looks like I'll=

probably choose a machine with two or four CPUs.  What sort of

complications does that add to set up and/or maintenance with Gentoo?

No complication.

Configure CONFIG_SMP in the the kernel for mult=
icore.
Everything else is transparent.

Cores make threads work be=
tter, so you'd want to investigate if
USE=3D"threads" is
useful for you.



I think he's looking for advice= on NUMA, not SMP.


= NUMA is also an option in the kernel. Should also be fully transparen= t.
I got one machine with NUMA and only had to set an option for it.

Does anyone know how to check it's working properly?

--
Joost
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.<= /span>
--f46d0444ece509b7ac04d0bb854b--