Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261518AbVEJBsM (ORCPT ); Mon, 9 May 2005 21:48:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261533AbVEJBsM (ORCPT ); Mon, 9 May 2005 21:48:12 -0400 Received: from colin.muc.de ([193.149.48.1]:11537 "EHLO mail.muc.de") by vger.kernel.org with ESMTP id S261518AbVEJBsI (ORCPT ); Mon, 9 May 2005 21:48:08 -0400 Date: 10 May 2005 03:48:07 +0200 Date: Tue, 10 May 2005 03:48:07 +0200 From: Andi Kleen To: Parag Warudkar Cc: linux-kernel@vger.kernel.org Subject: Re: X86_64 Ctx switch times - 32bit vs 64bit Message-ID: <20050510014807.GA97046@muc.de> References: <200505052138.57821.kernel-stuff@comcast.net> <200505092131.36126.kernel-stuff@comcast.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200505092131.36126.kernel-stuff@comcast.net> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 578 Lines: 16 > samples % symbol name > 20820 11.5424 copy_user_generic_c > 12990 7.2015 ia32_syscall > 10131 5.6165 gs_change > 9053 5.0189 __dequeue_signal > 7494 4.1546 find_pid Context switch does not even appear. Probably the i386 glibc does something much slower than 64bit. I would compare straces. -Andi - 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/