From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Wise Subject: Re: perftest question Date: Tue, 17 May 2011 15:55:31 -0500 Message-ID: <4DD2E0C3.5070905@opengridcomputing.com> References: <20110517131910.3dw9cgbfj4ck04cw@celticblues.com> <4DD2CF58.5080806@dev.mellanox.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4DD2CF58.5080806-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Ido Shamai Cc: ib-x2spCj9RiN0z5UmgcLIfJQ@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On 05/17/2011 02:41 PM, Ido Shamai wrote: > Those are actually the same tests, from an IB point of view. > > the difference between them is that ib_write_bw passes the arguments that need to be known to other side ( LID or GID, > Qp num, PSN, RKey and the address of the writing buffer) before post_sending, > > through TCP connection (using sockets) and the rdma_bw uses the rdma_cm module , which sends those arguments through > the IB wire and the SM. > > rdma_cm is not updated with all the features ib_write_bw have. I will work on this test shortly > > Ido > In addition, rdma_bw and rdma_lat work over iWARP when used with the --cma option. The ib_* versions do not since they don't have a option to use the rdma_cm, which is required for setting up iWARP connections. Steve. > > On 5/17/2011 10:19 PM, ib-x2spCj9RiN0z5UmgcLIfJQ@public.gmane.org wrote: >> Just downloaded a snapshot of the perftests. In the README under "Test Descriptions" it says: >> >> rdma_bw.c streaming BW test with RDMA write transactions >> >> and >> >> write_bw.c BW test with RDMA write transactions >> >> What is the difference between rdma_bw and write_bw? I see that the rdma_bw description contains "streaming" where >> as write_bw description does not... but I am not sure I understand what that means? >> >> E >> >> -- >> 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 -- 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