Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264186AbTFKUGL (ORCPT ); Wed, 11 Jun 2003 16:06:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264060AbTFKUGL (ORCPT ); Wed, 11 Jun 2003 16:06:11 -0400 Received: from h2.prohosting.com.ua ([217.106.231.81]:39092 "EHLO h2.prohosting.com.ua") by vger.kernel.org with ESMTP id S263752AbTFKUGB (ORCPT ); Wed, 11 Jun 2003 16:06:01 -0400 From: Artemio To: Linux Kernel Mailing List Subject: Re: SMP question Date: Wed, 11 Jun 2003 23:13:30 +0300 User-Agent: KMail/1.5 References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200306112313.30903.artemio@artemio.net> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - h2.prohosting.com.ua X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [0 0] X-AntiAbuse: Sender Address Domain - artemio.net Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1034 Lines: 37 Hello! > > How much performance will I loose this way? Is SMP *THAT* critical? > > You will lose about half your CPU power. Hmmm... So, you mean uni-processor Linux kernel can't see two processors as one "big" processor? > > - Run all tasks in a usual way, no hard realtime, but with SMP support. > > > > What would you suggest? > > If you don't install a kernel with SMP support, you might as well remove > one processor. :-) > > Also, if I turn hyperthreading off, how will it influence the > > system with SMP > > support? Without SMP support? > > In a system with more than one physical CPU, hyperthreading is not that > big of a performance boost. Okay, I will try turning hyperthreding off and see if RTLinux keeps hanging the machine. Thanks for your reply! Artemio. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/