Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262325AbUCOIRh (ORCPT ); Mon, 15 Mar 2004 03:17:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262327AbUCOIRh (ORCPT ); Mon, 15 Mar 2004 03:17:37 -0500 Received: from mail.shareable.org ([81.29.64.88]:18060 "EHLO mail.shareable.org") by vger.kernel.org with ESMTP id S262325AbUCOIRg (ORCPT ); Mon, 15 Mar 2004 03:17:36 -0500 Date: Mon, 15 Mar 2004 08:17:13 +0000 From: Jamie Lokier To: Horst von Brand Cc: lkml Subject: Re: finding out the value of HZ from userspace Message-ID: <20040315081713.GB7188@mail.shareable.org> References: <20040311141703.GE3053@luna.mooo.com> <200403140245.i2E2jKSx005375@eeyore.valparaiso.cl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200403140245.i2E2jKSx005375@eeyore.valparaiso.cl> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 570 Lines: 14 Horst von Brand wrote: > What for? It should be invisible to userspace... It's not invisible. select/poll/epoll/setitimer round their time argument according to HZ, and programs which do smooth (i.e. low _jitter_) animation of the kind where the eye is sensitive to the jitter need to track it and correct for it. -- Jamie - 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/