From mboxrd@z Thu Jan 1 00:00:00 1970 From: Werther Pirani Subject: Re: Documentation for libiverbs? Date: Thu, 14 Jan 2010 09:59:24 +0000 Message-ID: <4B4EEAFC.5040409@eso.org> References: <4B4D9B1E.1020604@eso.org> <4B4DB219.2020406@mellanox.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4B4DB219.2020406-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org Tziporet Koren wrote: > You can look at the ping-pong examples that come with libibverbs. http://www.openfabrics.org/downloads/libibverbs/ > Also you can look at the performance tests (ib_write_lat, ib_write_bw, etc). http://www.openfabrics.org/downloads/perftest/ Thank you for the prompt reply! Not quite what I'm looking for (a proper programmer's guide) but better than nothing and probably enough to get started. However, I have a question: our application needs multicast which, if I understand things correctly, means the only option is Unreliable Datagrams. I'm experimenting with ud_pingpong.c and it works, but as soon as a try to exchange messages bigger than 2048 bytes I have the following error: Failed status local length error (1) for wr_id 2 A table in Mellanox' "RDMA Aware Networks Programming" shows that for UDs the max messages size is limited by the MTU. That really being the case, how can I check/change the it? Many thanks in advance, Werther Pirani -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html