Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263505AbTIHTJv (ORCPT ); Mon, 8 Sep 2003 15:09:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263514AbTIHTJv (ORCPT ); Mon, 8 Sep 2003 15:09:51 -0400 Received: from [192.107.131.136] ([192.107.131.136]:25567 "EHLO nelson.sedsystems.ca") by vger.kernel.org with ESMTP id S263505AbTIHTJt (ORCPT ); Mon, 8 Sep 2003 15:09:49 -0400 Message-ID: <3F5CD45A.2060207@sedsystems.ca> Date: Mon, 08 Sep 2003 13:11:22 -0600 From: Kendrick Hamilton User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5b) Gecko/20030727 Thunderbird/0.1 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Timer Interrupts, please CC hamilton@sedsystems.ca Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 943 Lines: 21 Hello, Please send/cc responses to hamilton@sedsystems.ca We are using a custom modulator card with the Linux 2.2.16 kernel running on an IBM e-server (dual 2.8GHz, a lot of RAM). The modulator card uses interrupts to send data (the card has a large FIFO and interrupts when almost empty). The interrupt service routine re-fills the fifo. While it is re-filling the FIFO interrupts are disabled. We are noticing horrible clock skew. Can you tell me the frequency of timer interrupts used by the linux 2.2.16 kernel on Intel x86 SMP platform. I want to know how long my interrupt service routine can leave the interrupt disabled. TIA Kendrick Hamilton hamilton@sedsystems.ca - 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/