From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 4 Sep 2001 13:52:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 4 Sep 2001 13:52:46 -0400 Received: from h157s242a129n47.user.nortelnetworks.com ([47.129.242.157]:27320 "EHLO zcars0m9.ca.nortel.com") by vger.kernel.org with ESMTP id ; Tue, 4 Sep 2001 13:52:41 -0400 Message-ID: <3B95150B.BE5173B4@nortelnetworks.com> Date: Tue, 04 Sep 2001 13:53:15 -0400 X-Sybari-Space: 00000000 00000000 00000000 From: "Christopher Friesen" X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.3-custom i686) X-Accept-Language: en MIME-Version: 1.0 To: Mark Frazer Cc: linux-kernel@vger.kernel.org Subject: Re: Should I use Linux to develop driver for specialized ISA card? In-Reply-To: <01090410264000.14864@bits.linuxball> <3B950034.17909E5D@nortelnetworks.com> <20010904133227.B25240@somanetworks.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Orig: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mark Frazer wrote: > Christopher Friesen [01/09/04 12:29]: > > We have a realtime process that tries to run every 50ms. We're seeing actual > > worst-case scheduling latencies upwards of 300-400ms. > > With or without the low-latency patches? Without. It's PPC hardware, and the lowlatency stuff that I've found seems to be x86-centric. -- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com