From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: sky2 still badly broken Date: Thu, 3 May 2012 14:25:17 -0700 Message-ID: <20120503142517.310ea84c@nehalam.linuxnetplumber.net> References: <4F9AFE4E.8010108@linuxsystems.it> <20120430122501.5fff4b1e@nehalam.linuxnetplumber.net> <4FA14EC6.6050207@linuxsystems.it> <20120502115618.04ab8ff9@s6510.linuxnetplumber.net> <4FA2527A.6020808@linuxsystems.it> <20120503082352.771acab3@nehalam.linuxnetplumber.net> <4FA2DE52.306@linuxsystems.it> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: =?ISO-8859-1?B?TmljY29s8g==?= Belli Return-path: Received: from mail.vyatta.com ([76.74.103.46]:43698 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756549Ab2ECVZa convert rfc822-to-8bit (ORCPT ); Thu, 3 May 2012 17:25:30 -0400 In-Reply-To: <4FA2DE52.306@linuxsystems.it> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 03 May 2012 21:36:50 +0200 Niccol=F2 Belli wrote: > Il 03/05/2012 17:23, Stephen Hemminger ha scritto: > > The receiver on some versions of the chip can't keep up with full s= peed > > of 1G bit/sec. The receive FIFO has hardware issues, and since I d= on't > > work for Marvell, working around the problem is guesswork. >=20 > Just one question: if that is true why don't I have any problem with = a=20 > point to point gigabit link? I did transfer 3GB from ram to ram (ramf= s)=20 > at 100+MB/s without any issue in a point to point setup, as soon as I= =20 > attach it to the switch I have problems (very low transfer rate and t= ons=20 > of rx errors). I don't know but the PHY interaction is different with auto-crossover.