From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261521AbULNP0W (ORCPT ); Tue, 14 Dec 2004 10:26:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261529AbULNP0W (ORCPT ); Tue, 14 Dec 2004 10:26:22 -0500 Received: from mail-relay-4.tiscali.it ([213.205.33.44]:30689 "EHLO mail-relay-4.tiscali.it") by vger.kernel.org with ESMTP id S261521AbULNP0P (ORCPT ); Tue, 14 Dec 2004 10:26:15 -0500 Date: Tue, 14 Dec 2004 16:25:58 +0100 From: Andrea Arcangeli To: Pavel Machek Cc: Zwane Mwaikambo , Con Kolivas , linux-kernel@vger.kernel.org Subject: Re: dynamic-hz Message-ID: <20041214152558.GB16322@dualathlon.random> References: <20041212234331.GO16322@dualathlon.random> <20041213002751.GP16322@dualathlon.random> <20041213112853.GS16322@dualathlon.random> <20041213124313.GB29426@atrey.karlin.mff.cuni.cz> <20041213125844.GY16322@dualathlon.random> <20041213191249.GB1052@elf.ucw.cz> <20041214023651.GT16322@dualathlon.random> <20041214095939.GC1063@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041214095939.GC1063@elf.ucw.cz> X-GPG-Key: 1024D/68B9CB43 13D9 8355 295F 4823 7C49 C012 DFA1 686E 68B9 CB43 X-PGP-Key: 1024R/CB4660B9 CC A0 71 81 F4 A0 63 AC C0 4B 81 1D 8C 15 C8 E5 User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 14, 2004 at 10:59:39AM +0100, Pavel Machek wrote: > Are you using CONFIG_HPET_TIMER by chance? It seems to be missing some > strategic -1, TSC (etc) get it right. I'm not using hpet because it's an old hardware, this is with timer_tsc. It must be reproducible in any machine out there, especially with machines with usb it should be reproducible even without any userspace testcase doing iopl/cli/sti. Time will go silenty in the future at every usb irq (they often last 3/4msec).