复: 答复: 答复: doubt on latency result with OpenMPI library
On Mar 27, 2014, at 11:45 PM, "Wang,Yanfei(SYS)" wrote:
> 1. In the RoCE, we cannot use OOB(via tcp socket) for RDMA connection.
More specifically, RoCE QPs can only be made using the RDMA connection manager.
> However,
oubt on latency result with OpenMPI library
On Mar 27, 2014, at 11:15 AM, "Wang,Yanfei(SYS)" wrote:
> Normally we use rdma-cm to build rdma connection ,then create Qpairs to do
> rdma data transmit ion, so what is the consideration for separating rdma-cm
> connection built and
to use RDMA for communication.
What it does is tell the openib BTL to use RDMA to establish the point-to-point
connection between the two processes. The actual messaging may or may not use
RDMA to move the bytes - that's a totally separate code path.
On Thu, Mar 27, 2014 at 6:2
e point-to-point
connection between the two processes. The actual messaging may or may not use
RDMA to move the bytes - that's a totally separate code path.
On Thu, Mar 27, 2014 at 6:21 AM, Wang,Yanfei(SYS)
mailto:wangyanfe...@baidu.com>> wrote:
it seem that all confusions have already been
off-node
> communication.
>
> Also, remember that you can "mpirun ... hostname" (i.e., the Linux "hostname"
> command) to verify what servers you are actually running on.
>
> I see that the ompi_info(1) man page is not super-detailed about the --level
>
btl_tcp_if_include.
[root@bb-nsi-ib04 pt2pt]#
Hope to have a deep understand on it~
Thanks
--Yanfei
发件人: devel [mailto:devel-boun...@open-mpi.org] 代表 Wang,Yanfei(SYS)
发送时间: 2014年3月27日 18:17
收件人: Open MPI Developers
主题: [OMPI devel] 答复: doubt on latency result with OpenMPI library
HI，
间: 2014年3月27日 18:05
收件人: Open MPI Developers
主题: Re: [OMPI devel] doubt on latency result with OpenMPI library
Try adding "--map-by node" to your command line to ensure the procs really are
running on separate nodes.
On Thu, Mar 27, 2014 at 1:40 AM, Wang,Yanfei(SYS)
mailto:wangyanfe...
Hi，
HW Test Topology：
Ip：192.168.72.4/24 �C192.168.72.4/24, enable vlan and RoCE
IB03 server 40G port-- - 40G Ethernet switch IB04 server 40G port：
configure it as RoCE link
IP: 192.168.71.3/24 ---192.168.71.4/24
IB03 server 10G port �C 10G Ethernet switch �C IB04 server 10G port： configure
.
Thanks
Ralph
On Tue, Mar 25, 2014 at 9:51 PM, Wang,Yanfei(SYS)
mailto:wangyanfe...@baidu.com>> wrote:
Hi,
Thanks jeff, and I have not figured out what happened yet with this FAQ.
1. Ssh remote login OK:
[root@bb-nsi-ib04 examples]# ssh ib03 hostname
bb-nsi-ib03.bb01.*.com
[root@bb-nsi-ib04 ex
pi.org/faq/?category=running#diagnose-multi-host-problems
On Mar 25, 2014, at 6:54 AM, "Wang,Yanfei(SYS)" wrote:
> Hi,
>
> I am a fresh learner of OpenMPI programmer, and have some troubles on
> building mpi programming, hope some helps..
>
> The example/helloc_c ca
Hi,
I am a fresh learner of OpenMPI programmer, and have some troubles on building
mpi programming, hope some helps..
The example/helloc_c can works successfully with 2 process on local machine,
however, do not work on two separate physical node.
Physical two nodes:
Eg:
[root@bb-nsi-ib04 examp
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