Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 18 Dec 2002 07:53:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 18 Dec 2002 07:53:18 -0500 Received: from users.linvision.com ([62.58.92.114]:37775 "EHLO abraracourcix.bitwizard.nl") by vger.kernel.org with ESMTP id ; Wed, 18 Dec 2002 07:53:17 -0500 Date: Wed, 18 Dec 2002 14:00:59 +0100 From: Rogier Wolff To: Linus Torvalds Cc: "H. Peter Anvin" , Ulrich Drepper , Alan Cox , Matti Aarnio , Hugh Dickins , Dave Jones , Ingo Molnar , Linux Kernel Mailing List Subject: Re: Intel P6 vs P7 system call performance Message-ID: <20021218140059.B15645@bitwizard.nl> References: <3DFF7951.6020309@transmeta.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.22.1i Organization: BitWizard.nl Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1347 Lines: 27 On Tue, Dec 17, 2002 at 11:37:04AM -0800, Linus Torvalds wrote: > How much do you think gettimeofday() really matters on a desktop? Sure, X > apps do gettimeofday() calls, but they do a whole lot more of _other_ > calls, and gettimeofday() is really far far down in the noise for them. > The people who really call for gettimeofday() as a performance thing seem > to be database people who want it as a timestamp. But those are the same > people who also want NUMA machines which don't necessarily have > synchronized clocks. Once the kernel provides the right infrastructure, doing it may become so easy that it can be tried and implemented and benchmarked with so little effort that it would simply stick. Roger. -- ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 ** *-- BitWizard writes Linux device drivers for any device you may have! --* * The Worlds Ecosystem is a stable system. Stable systems may experience * * excursions from the stable situation. We are currently in such an * * excursion: The stable situation does not include humans. *************** - 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/