From owner-freebsd-amd64@FreeBSD.ORG Tue Jan 24 17:54:05 2006 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A8B1216A420 for ; Tue, 24 Jan 2006 17:54:05 +0000 (GMT) (envelope-from kgunders@teamcool.net) Received: from koyukuk.teamcool.net (koyukuk.teamcool.net [209.161.34.19]) by mx1.FreeBSD.org (Postfix) with ESMTP id 56D2943D45 for ; Tue, 24 Jan 2006 17:54:05 +0000 (GMT) (envelope-from kgunders@teamcool.net) Received: from koyukuk.teamcool.net (localhost [127.0.0.1]) by koyukuk.teamcool.net (TeamCool Rocks) with ESMTP id 22C55F80F for ; Tue, 24 Jan 2006 10:54:02 -0700 (MST) Received: from cochise.teamcool.net (unknown [192.168.1.57]) by koyukuk.teamcool.net (TeamCool Rocks) with ESMTP id CA01FF805 for ; Tue, 24 Jan 2006 10:54:01 -0700 (MST) Date: Tue, 24 Jan 2006 11:03:34 -0700 From: Ken Gunderson To: freebsd-amd64@freebsd.org Message-Id: <20060124110334.40e81208.kgunders@teamcool.net> Organization: Teamcool Networks X-Mailer: Sylpheed version 1.9.12 (GTK+ 2.6.7; i386-portbld-freebsd5.4) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP Subject: dual vs single core opteron 100's X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Jan 2006 17:54:05 -0000 Greets Everyone: I was getting into a discussion the other day about this and decided to see what the FBSD amd64 gurus had to say about it. Given approximately equal cost of, for example, a single core Opteron150 (2.4GHz) and a dual core Opteron165 (1.8GHz) under what kind of situations would one be preferred over the other? fwiw- my friend asserts it will ALWAYS be the faster single core because of context switches and dual cores are optimized for highly multi- threaded OS's (e.g. WInblows). But 1) I think the scheduler has been improved in 6.0, and 2) he's a linuxer. And yes, I know what AMD has to say on this but am interested in the FBSD community's perspective on this w.r.t. FBSD. TIA -- Best regards, Ken Gunderson Q: Because it reverses the logical flow of conversation. A: Why is putting a reply at the top of the message frowned upon?