From owner-freebsd-hackers Thu Jun 8 22:23:24 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from smtp10.atl.mindspring.net (smtp10.atl.mindspring.net [207.69.200.246]) by hub.freebsd.org (Postfix) with ESMTP id 2096837C1C9 for ; Thu, 8 Jun 2000 22:23:21 -0700 (PDT) (envelope-from jhix@mindspring.com) Received: from mindspring.com (user-33qtgqb.dialup.mindspring.com [199.174.195.75]) by smtp10.atl.mindspring.net (8.9.3/8.8.5) with ESMTP id BAA00405; Fri, 9 Jun 2000 01:23:17 -0400 (EDT) Message-ID: <39407F67.8B217731@mindspring.com> Date: Thu, 08 Jun 2000 22:23:51 -0700 From: W Gerald Hicks X-Mailer: Mozilla 4.7 [en] (X11; I; FreeBSD 4.0-STABLE i386) X-Accept-Language: en MIME-Version: 1.0 To: Dennis Cc: hackers@FreeBSD.ORG Subject: Re: if_dc in v4.0 - Forcing store and forward? References: <20000608000153.6AC291CE1@overcee.netplex.com.au> <200006081459.KAA24211@etinc.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Dennis wrote: > > At 10:48 PM 6/7/00 -0700, W Gerald Hicks wrote: > >Peter Wemm wrote: > > > >> I suspect a generic chipset fault, or some design quirk that we are not > >> working around. Note that the windoze drivers for these devices put them > >> permanently in store-and-forward mode. if_de has the exact same problem on > >> all of the systems above. > > Well we never saw these problems in v3.4...so what changed? > > DB The chips vary widely, we experienced great behavioral differences between steppings. The 21143 was particulary worrisome, as were some of the 21140 variants. I definitely experienced tx underruns on FreeBSD 3.4 with a 21140A. Never saw them with a good old 21040 though. After I was told by Intel that they're killing the device off, we decided to stop developing boards with them and eliminated at least *that* source of aggravation ;-) -- Jerry Hicks jhix@mindspring.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message