Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751323AbWESJhy (ORCPT ); Fri, 19 May 2006 05:37:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751325AbWESJhy (ORCPT ); Fri, 19 May 2006 05:37:54 -0400 Received: from nf-out-0910.google.com ([64.233.182.184]:24512 "EHLO nf-out-0910.google.com") by vger.kernel.org with ESMTP id S1751323AbWESJhy convert rfc822-to-8bit (ORCPT ); Fri, 19 May 2006 05:37:54 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=TLKWxazpv2xb8J+X4Utpbr0KW6AGOJPk9ODmL1fz5F5L5eU4MOcYu9k4TShQA5o1PJEH7Fe7qxCyZnSzt4tp0r+KyVOTOT3epBTDtHFSHUrs2PrqlSR1cAPuUXzFMfz7hESBnMjS0+Lw/992bighlCLTZalwY/H7E2bNG5ViNbU= Message-ID: Date: Fri, 19 May 2006 11:37:52 +0200 From: "Yitzchak Eidus" To: linux-kernel@vger.kernel.org Subject: how stable are the BogoMIPS and the udelay functions on "dynamic clock speed change cpus" MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 740 Lines: 13 because udelay work on the principle that it know "how much work the cpu can do in a time" and it work by just doing a loop of nothing, how stable is it when the cpu clock rate is keep changing all the time? does it update its loops_per_jiffy varible each time the cpu clock is change? or does it have another solution to this problem? or since before the cpu enter to this udelay function it must do some work like entering the systemcall and so on , the cpu clock rate is jump to the original? - 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/