Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964791AbVIMOUH (ORCPT ); Tue, 13 Sep 2005 10:20:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964792AbVIMOUH (ORCPT ); Tue, 13 Sep 2005 10:20:07 -0400 Received: from gockel.physik3.uni-rostock.de ([139.30.44.16]:43160 "EHLO gockel.physik3.uni-rostock.de") by vger.kernel.org with ESMTP id S964791AbVIMOUG (ORCPT ); Tue, 13 Sep 2005 10:20:06 -0400 Date: Tue, 13 Sep 2005 16:20:03 +0200 (CEST) From: Tim Schmielau To: Mark Hounschell cc: linux-kernel@vger.kernel.org Subject: Re: HZ question In-Reply-To: <4326DB8A.7040109@compro.net> Message-ID: References: <4326CAB3.6020109@compro.net> <4326DB8A.7040109@compro.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 751 Lines: 19 On Tue, 13 Sep 2005, Mark Hounschell wrote: > Most if not all userland delay calls rely on HZ value in some way or > another. The minimum reliable delay you can get is one (kernel)HZ. A > program that needs an acurrate delay for a time shorter that one > (kernel)HZ may have an alternative if it knows that HZ is greater the > the requested delay. Just assume that kernel HZ are USER_HZ and see anything else as an additional bonus that you cannot rely on. What does 'acurrate delay' mean, anyways? Tim - 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/