From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: To: 9fans@cse.psu.edu Subject: Re: [9fans] datakit From: Brantley Coile Date: Sat, 21 Aug 2004 10:22:35 -0400 In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="upas-ubvmprwjsjwajsfuvkqoaimtnx" Topicbox-Message-UUID: d8063e1c-eacd-11e9-9e20-41e7f4b1d025 This is a multi-part message in MIME format. --upas-ubvmprwjsjwajsfuvkqoaimtnx Content-Disposition: inline Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit This isn't the first time offloading things for tcp has been trie. I remember when TCP first made its appearance it was criticised for using to many cpu cycles. So, thought hardworking entrepreneurs, we can put TCP into a separate processor and off load the work. Summer USENIX of '85 saw a lot of these TCP Offload Engines. That didn't last long. Nice thing about being around for so long; you get to avoid stepping in the same pile twice. --upas-ubvmprwjsjwajsfuvkqoaimtnx Content-Type: message/rfc822 Content-Disposition: inline Received: from mail.cse.psu.edu ([130.203.4.6]) by coraid.com; Fri Aug 20 20:34:49 EDT 2004 Received: from psuvax1.cse.psu.edu (localhost [127.0.0.1]) by mail.cse.psu.edu (CSE Mail Server) with ESMTP id E9F8118C4C for ; Fri, 20 Aug 2004 20:34:16 -0400 (EDT) X-Original-To: 9fans@cse.psu.edu Delivered-To: 9fans@cse.psu.edu Received: from localhost (localhost [127.0.0.1]) by mail.cse.psu.edu (CSE Mail Server) with ESMTP id 45DF817FFA for <9fans@cse.psu.edu>; Fri, 20 Aug 2004 20:33:52 -0400 (EDT) Received: from mail.cse.psu.edu ([127.0.0.1]) by localhost (psuvax1 [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 03870-01-76 for <9fans@cse.psu.edu>; Fri, 20 Aug 2004 20:33:51 -0400 (EDT) Received: from mailwasher-b.lanl.gov (mailwasher.lanl.gov [192.65.95.54]) by mail.cse.psu.edu (CSE Mail Server) with ESMTP id EFDEC17FEB for <9fans@cse.psu.edu>; Fri, 20 Aug 2004 20:33:50 -0400 (EDT) Received: from mailrelay1.lanl.gov (localhost.localdomain [127.0.0.1]) by mailwasher-b.lanl.gov (8.12.10/8.12.10/(ccn-5)) with ESMTP id i7L0Xn6U004366 for <9fans@cse.psu.edu>; Fri, 20 Aug 2004 18:33:49 -0600 Received: from ccs-mail.lanl.gov (ccs-mail.lanl.gov [128.165.4.126]) by mailrelay1.lanl.gov (8.12.10/8.12.11/(ccn-5)) with ESMTP id i7L0Xm1p016039 for <9fans@cse.psu.edu>; Fri, 20 Aug 2004 18:33:48 -0600 Received: from maxroach.lanl.gov (maxroach.lanl.gov [128.165.250.187]) by ccs-mail.lanl.gov (8.12.10/8.12.10/(ccn-5)) with ESMTP id i7L0XmwO027467 for <9fans@cse.psu.edu>; Fri, 20 Aug 2004 18:33:48 -0600 Date: Fri, 20 Aug 2004 18:33:47 -0600 (MDT) From: ron minnich To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] datakit In-Reply-To: <53811f0a56be6321b1fe11d35ee21d21@collyer.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-PMX-Version: 4.6.0.99824 X-Scanned-By: MIMEDefang 2.35 X-Virus-Scanned: by amavisd-new at cse.psu.edu X-BeenThere: 9fans@cse.psu.edu X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> List-Id: Fans of the OS Plan 9 from Bell Labs <9fans.cse.psu.edu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: 9fans-bounces+bwc=borf.com@cse.psu.edu Errors-To: 9fans-bounces+bwc=borf.com@cse.psu.edu just for fun, I recently fixed a simple problem on my 256-node cluster by turning the checksum offload OFF. Of course, the problem was some weird driver wart that is as yet unfixed .... I guess offload is a great idea, I just keep seeing all the failure modes :-) ron --upas-ubvmprwjsjwajsfuvkqoaimtnx--