From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 14 Jul 2005 15:40:38 +0100 (BST) Received: from smtp-out.hotpop.com ([IPv6:::ffff:38.113.3.61]:28845 "EHLO smtp-out.hotpop.com") by linux-mips.org with ESMTP id convert rfc822-to-8bit; Thu, 14 Jul 2005 15:40:19 +0100 Received: from hotpop.com (kubrick.hotpop.com [38.113.3.103]) by smtp-out.hotpop.com (Postfix) with SMTP id 2EE961416454 for ; Thu, 14 Jul 2005 14:41:17 +0000 (UTC) Received: from cavan (unknown [62.253.252.7]) by smtp-1.hotpop.com (Postfix) with ESMTP id DD8941A0234 for ; Thu, 14 Jul 2005 13:52:54 +0000 (UTC) Date: Thu, 14 Jul 2005 13:52:36 +0000 From: jaypee@hotpop.com Subject: Re: Au1550 ethernet throughput low To: linux-mips References: In-Reply-To: (from ajaysingh@ti.com on Thu Jul 14 06:02:22 2005) X-Mailer: Balsa 2.3.3 Message-Id: <1121349173l.5178l.0l@cavan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; DelSp=Yes; Format=Flowed Content-Disposition: inline Content-Transfer-Encoding: 8BIT X-HotPOP: ----------------------------------------------- Sent By HotPOP.com FREE Email Get your FREE POP email at www.HotPOP.com ----------------------------------------------- Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 8482 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: jaypee@hotpop.com Precedence: bulk X-list: linux-mips -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 14/07/05 06:02:22, Singh, Ajay wrote: > Is your driver on Linux 2.6 NAPI enabled ? And is CONFIG_PREEMPT=y? Turning preempt on made no difference, maybe a little worse. I put a scope on the TX enable line and it is high for ~100us and low ~50us. With the 2.4 kernel on au1000 it is high all the time. This to me suggest there is some thing wrong in the au1000_eth driver/ interrupt handling/ packet scheduling in 2.6 as it is not keeping the DMA buffers full. - -- mailto:jaypee@hotpop.com http://www.jaypee.org.uk -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFC1m41ZDxnKy3oOpYRAhooAJ9W7J8ZpXywqW0jPxc0b8hI3iS/DwCfZzWM 6lp6Z7cHYwW3WWW87SJrZPI= =1No0 -----END PGP SIGNATURE-----