From owner-freebsd-hackers@FreeBSD.ORG  Thu Jan  8 09:43:59 2009
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A69FC1065677
	for <freebsd-hackers@freebsd.org>; Thu,  8 Jan 2009 09:43:59 +0000 (UTC)
	(envelope-from aksoy.for.research@gmail.com)
Received: from fk-out-0910.google.com (fk-out-0910.google.com [209.85.128.189])
	by mx1.freebsd.org (Postfix) with ESMTP id 35D068FC56
	for <freebsd-hackers@freebsd.org>; Thu,  8 Jan 2009 09:43:59 +0000 (UTC)
	(envelope-from aksoy.for.research@gmail.com)
Received: by fk-out-0910.google.com with SMTP id k31so5857106fkk.11
	for <freebsd-hackers@freebsd.org>; Thu, 08 Jan 2009 01:43:58 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:received:received:message-id:date:from:to
	:subject:mime-version:content-type;
	bh=1UCvuoikmQdjrQuPv+jxj2yl1r9aJawkAL0ZJyq5qXk=;
	b=NkeHcM2sP8n+59ufOFQVyvhER2OUvub5F98Uv02zbhZ6uQd+cVOXWfAduRXY6qeUPg
	DVprhKEFRIXbPV7Hj3BoBrW9yjBUCV38KS7TeFJwomOj7azCP4Y7Er4au9HRer/cRo1p
	SoIuzVXa1E+MiFnMMbYySSIyGXz+hcV/96cug=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=message-id:date:from:to:subject:mime-version:content-type;
	b=mJZwAw9afkU1Xz4/mLTbXoXTXX30dy71JJYlrRtBbgcpD2ZzmtGuDM4N3hCsH6vehR
	n+Si1woB8Uh5neABM1pyx4aItI25OTD5pKwVZ+2CZBQQeRtYxrcTV6OOzUPoH1XvjUQ+
	vMLGVyDrwaRmBgH8FZCHnt3U8iOmgwBv5ufXg=
Received: by 10.181.220.19 with SMTP id x19mr9258772bkq.136.1231406588680;
	Thu, 08 Jan 2009 01:23:08 -0800 (PST)
Received: by 10.181.153.11 with HTTP; Thu, 8 Jan 2009 01:23:08 -0800 (PST)
Message-ID: <14ded62c0901080123u7268055epb3e17d84aa757051@mail.gmail.com>
Date: Thu, 8 Jan 2009 04:23:08 -0500
From: "=?ISO-8859-1?Q?Mehmet_Ali_Aksoy_T=DCYS=DCZ?="
	<aksoy.for.research@gmail.com>
To: freebsd-hackers@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Subject: Threads and SMP kernel scheduling
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 08 Jan 2009 09:44:00 -0000

Hi all,

After I had a bit googling I got confused.

My questions are simple and they are as follows :

1-) "Are pthreads (or threads in general) of one process scheduled to
different cores on multi-core systems running Linux or BSD?"

2-) What if there are multiple processes which have multiple threads? Does
it change the answer of (1)?

I found some answers but they are not sharp. Somebody says "can be
scheduled" but "can be" is not a precise answer (in my opinion.)

Thanks everybody in advance.

Mehmet