Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754630Ab0DNIw3 (ORCPT ); Wed, 14 Apr 2010 04:52:29 -0400 Received: from pmx3.lnl.infn.it ([192.135.30.243]:58919 "EHLO pmx3.lnl.infn.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754126Ab0DNIwZ (ORCPT ); Wed, 14 Apr 2010 04:52:25 -0400 Message-ID: <7037536.1271235105513.SLOX.WebMail.wwwrun@imap.lnl.infn.it> Date: Wed, 14 Apr 2010 10:51:45 +0200 (CEST) From: Andrea Gozzelino To: "Tung, Chien Tin" , Steve Wise Subject: RE: Socket Direct Protocol: help (2) Cc: Andrea Gozzelino , "linux-kernel@vger.kernel.org" , "linux-rdma@vger.kernel.org" , "rolandd@cisco.com" , "peterz@infradead.org" , "pavel@ucw.cz" , "mingo@elte.hu" , Eric B Munson In-Reply-To: <2EFBCAEF10980645BBCFB605689E08E9047C7405E9@azsmsx506.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Priority: 3 (normal) X-Mailer: SuSE Linux Openexchange Server 4 - WebMail (Build 2.4160) X-Operating-System: Linux 2.4.21-314-smp i386 (JVM 1.3.1_20) Organization: INFN - Laboratori Nazionali Legnaro References: <13381_1271060138_o3C8FUH8013968_2977669.1271060085255.SLOX.WebMail.wwwrun@imap.lnl.infn.it> <1246722.1271082830120.SLOX.WebMail.wwwrun@imap.lnl.infn.it> <2EFBCAEF10980645BBCFB605689E08E9047C7402DA@azsmsx506.amr.corp.intel.com> <4BC49E2B.3000804@opengridcomputing.com> <2EFBCAEF10980645BBCFB605689E08E9047C7405A0@azsmsx506.amr.corp.intel.com> <4BC4D22A.6020700@opengridcomputing.com> <2EFBCAEF10980645BBCFB605689E08E9047C7405E9@azsmsx506.amr.corp.intel.com> X-PMX-Version: 5.5.9.395186, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.4.14.83915 (i) X-Spam-Flag: NO Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1801 Lines: 57 On Apr 13, 2010 10:22 PM, "Tung, Chien Tin" wrote: > >>> Chien, does the NE020 support FMRs? I looked at the nes ofed-1.5 > >>> code > >>> and it appears to do nothing in the map_phys_fmr functions. > >>> > >> > >> We never implemented map_phys_fmr. Is it relevant to the # of SGEs? > >> > >No, but SDP uses FMRs. I don't think it will run without FMR support. > > > > > Good to know. Thanks. > > Chien > > Hi Steve and Chien, I understand that NE020 cards have problem with SDP connected with map_phy_fmr (FMR stands for Fast Memory Region). Is it possible to solve/fix this point? If yes, have you an idea about the time that is necessary to code development/build? If no, can you suggest me a card that supports SDP protocol? I work on NE020 cards from February 2010 for an INFN experimental proposal, called REDIGO (Read out at 10 Gbits/s), about the data acquisition and movement systems. The covergence of storage protocols around 10 Gigabits/s Ethernet protocols shows that one way could be the Remote Direct Memory Access (RDMA). The goals are the investigations of latency time, the throughput, the buffer size schemes and finally the global event building bandwidth. Do you know if NE020 cards have problems with librdma (RDMA procedures, in general) and / or with MPI versions? Thank you very much, Andrea Andrea Gozzelino INFN - Laboratori Nazionali di Legnaro (LNL) Viale dell'Universita' 2 I-35020 - Legnaro (PD)- ITALIA Tel: +39 049 8068346 Fax: +39 049 641925 Mail: andrea.gozzelino@lnl.infn.it -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/