From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161126AbWGNVCH (ORCPT ); Fri, 14 Jul 2006 17:02:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161301AbWGNVCG (ORCPT ); Fri, 14 Jul 2006 17:02:06 -0400 Received: from deeprooted.net ([216.254.16.51]:32693 "EHLO paris.internal.net") by vger.kernel.org with ESMTP id S1161126AbWGNVCF (ORCPT ); Fri, 14 Jul 2006 17:02:05 -0400 Subject: Re: [PATCH] 2.6.17-rt add clockevent to ixp4xx From: Kevin Hilman To: Milan Svoboda Cc: linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Organization: Deep Root Systems Date: Fri, 14 Jul 2006 16:02:04 -0500 Message-Id: <1152910924.16702.34.camel@vence.internal.net> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2006-07-14 at 12:36 +0200, Milan Svoboda wrote: > I did patch against -hrt-dyntick (see lkml, this thread) wich is almost > the same > as this one against -rt (for ixp4xx part only) and I found that when timer > is > loaded with IXP4XX_OST_ONE_SHOT the latency time suddenly drops to ~30usec instead > of ~2000usec! I'd like know what's the reason for this... You should implement the set_mode method as well and set the IXP4XX_OST_ONE_SHOT when the clockevent layer mode == CLOCK_EVT_ONESHOT. Kevin