From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: [PATCH v2 14/15] IB/srp: Make transport layer retry count configurable Date: Mon, 01 Jul 2013 13:44:23 +0200 Message-ID: <51D16B97.904@acm.org> References: <51CD856A.3010102@acm.org> <51CD8876.9020307@acm.org> <1372628891.12468.52.camel@haswell.thedillows.org> <51D13B52.5060803@acm.org> <1372677965.12468.57.camel@haswell.thedillows.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1372677965.12468.57.camel-a7a0dvSY7KqLUyTwlgNVppKKF0rrzTr+@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: David Dillow Cc: Jason Gunthorpe , Roland Dreier , Vu Pham , Sebastian Riemer , linux-rdma List-Id: linux-rdma@vger.kernel.org On 07/01/13 13:26, David Dillow wrote: > On Mon, 2013-07-01 at 10:18 +0200, Bart Van Assche wrote: >> The InfiniBand specification mentions the following about differential >> receiver inputs (C6-11.2.1): "A BER of 10^-12 shall be achieved when >> connected to the worst case transmitter through any compliant channel". > > There are a _lot_ of networks out there with non-compliant channels, > then. The spec says one thing, but the reality matters. Also, perhaps my > math is wrong, but that seems to be one error every 18 seconds or so at > FDR speeds? If data is transferred at line rate on an FDR network, I agree that about one error is expected about every 18 seconds. Sorry but it's not clear to me what makes you think that there are a lot of IB networks with non-compliant channels ? Bart. -- 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