As far as PCIe, I am looking into:
1. Dolphin's implementation of IPoPCIe 2. SDP protocol and how it can be
utilized, mapping TCP to RDMA
Not sure if the only answer for this is a custom stack, API/kernel module.
Do you have any input on the above mentioned things?
On Tuesday, March 1, 2016 6:42 AM, Jeff Squyres (jsquyres)
<jsquy...@cisco.com> wrote:
On Feb 29, 2016, at 6:48 PM, Matthew Larkin <lar...@yahoo.com> wrote:
>
> 1. I know OpenMPI supports ethernet, but where does it clearly state that?
> - I see on the FAQ on the web page there is a whole list of network
> interconnect, but how do I relate that to Ethernet network etc.?
Open MPI actually supports multiple Ethernet-based interconnects: Cisco usNIC,
iWARP, Mellanox RoCE, and TCP sockets.
I suspect the one you are asking about is TCP sockets (which technically
doesn't need to run over Ethernet, but TCP-over-Ethernet is probably its most
common use case).
> 2. Does OpenMPI work with PCIe and PCIe switch?
> - Is there any specific configuration to get it to work?
Do you have a specific vendor device / networking stack in mind? In general,
Open MPI will use:
- some kind of local IPC mechanism (e.g., some flavor of shared memory) for
intra-node communication
- some kind of networking API for inter-node communication
Extending PCIe between servers blurs this line a bit -- peer MPI processes on a
remote server can make it look like they are actually local. So it depends on
your network stack: do you have some kind of API that effects messaging
transport over PCIe?
--
Jeff Squyres
jsquy...@cisco.com
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