From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Dake Subject: Re: Is multicast only available with UD Transport mode? Date: Tue, 16 Nov 2010 11:03:06 -0700 Message-ID: <4CE2C75A.3000006@redhat.com> References: <20101112101223.44mbsbnygwcw0008@peddycoart.com> <20101116100940.uxjift8pwwg40osc@celticblues.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20101116100940.uxjift8pwwg40osc-x2spCj9RiN0z5UmgcLIfJQ@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: ib-x2spCj9RiN0z5UmgcLIfJQ@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On 11/16/2010 10:09 AM, ib-x2spCj9RiN0z5UmgcLIfJQ@public.gmane.org wrote: > According to a document I have, "RDMA Aware Networks Programming User > Manual" from Mellanox, the max message size for UD is the MTU. Is the > MTU tweakable? What are the limits of tweakability? > > E > Some systems have a network MTU of 2048 other cards/switches are 4096. Don't forget you will need the header in the message which consumes some of the MTU room available. Regards -steve > > Quoting "Hefty, Sean" : > >>> Is multicast only available with UD Transport mode? >> >> yes >> > > > > -- > 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 -- 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