From mboxrd@z Thu Jan 1 00:00:00 1970 From: Reeted Subject: Re: IPoIB performance Date: Wed, 05 Sep 2012 19:52:43 +0200 Message-ID: <5047916B.4070706@shiftmail.org> References: <0000013997217ec3-f6e2593f-2ff8-408d-814e-0345582b31ca-000000@email.amazonses.com> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <0000013997217ec3-f6e2593f-2ff8-408d-814e-0345582b31ca-000000-p/GC64/jrecnJqMo6gzdpkEOCMrvLtNR@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Christoph Lameter Cc: "Atchley, Scott" , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-rdma@vger.kernel.org On 09/05/12 17:51, Christoph Lameter wrote: > PCI-E on PCI 2.0 should give you up to about 2.3 Gbytes/sec with these > nics. So there is like something that the network layer does to you that > limits the bandwidth. I think those are 8 lane PCI-e 2.0 so that would be 500MB/sec x 8 that's 4 GBytes/sec. Or you really mean there is almost 50% overhead? -- 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