Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934009AbZD3RwV (ORCPT ); Thu, 30 Apr 2009 13:52:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932815AbZD3R15 (ORCPT ); Thu, 30 Apr 2009 13:27:57 -0400 Received: from mail-fx0-f158.google.com ([209.85.220.158]:33534 "EHLO mail-fx0-f158.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1765464AbZD3R1z (ORCPT ); Thu, 30 Apr 2009 13:27:55 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:content-type :content-transfer-encoding; b=BPViVAXlyTpd1niyFl3cxxJN+fIVSlTFUPqOZOOf1au0zJyCoXWaeotiTdrA9jgl/s 4jMJ3BZAfAwdeTaVEWmVOPX+xE/EIKQ0YtiQ8xgWTV8l+GqULNvs8+uIrStDwn2LIZ1v E83E/6lYVYxM58WOkm6KHQ7RHuB+VhBs48OIw= Message-ID: <49F9DF96.7090108@gmail.com> Date: Thu, 30 Apr 2009 19:27:50 +0200 From: Artur Skawina User-Agent: Thunderbird 2.0.0.22pre (X11/20090422) MIME-Version: 1.0 To: Alan Cox CC: akataria@vmware.com, Thomas Gleixner , Ingo Molnar , the arch/x86 maintainers , LKML Subject: Re: Default HZ value for X86 References: <1240873630.14713.25.camel@alok-dev1> <20090428003454.08d1660c@lxorguk.ukuu.org.uk> In-Reply-To: <20090428003454.08d1660c@lxorguk.ukuu.org.uk> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1000 Lines: 26 Alan Cox wrote: > On Mon, 27 Apr 2009 16:07:10 -0700 > Alok Kataria wrote: >> >> I was wondering why do we still have the default HZ value as 1000 for >> the x86 kernels. >> >> arch/x86/configs/i386_defconfig:CONFIG_HZ=1000 >> arch/x86/configs/x86_64_defconfig:CONFIG_HZ=1000 >> >> With the highres timer implementation it was planned to move away from >> relying on high timer interrupt frequency for applications requiring >> precise high resolution timers. > > With the tickless kernel does this really matter any more ? We might as It didn't matter much, until the kernel stopped actually being tickless. These days, w/ ints on when nonidle, it probably does again... > well keep a logical 1000 for convenience and accuracy. -- 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/