Ptcp or MPI over NPmpi.
>
> Teng Ma
>
>
> On Thu, Jan 12, 2012 at 10:28 AM, Roberto Rey wrote:
>
>> Thanks for your reply!
>>
>> I'm using TCP BTL because I don't have any other option in Amazon with 10
>> Gbit Ethernet.
>>
>> I al
on't have an immediate explanation for that -- if you're
> using the TCP BTL, then OMPI should be using TCP sockets, just like netpipe
> and the others.
>
> You *might* want to check hyperthreading and process binding settings in
> all your tests.
>
>
> On Jan 12, 2
tperf over TCP -> 100us
Netpipe over TCP (NPtcp)-> 100us
HPCbench over TCP-> 100us
Netpipe over OpenMPI (NPmpi) -> 60us
HPCBench over OpenMPI -> 60us
Any clues?
Thanks a lot!
2012/1/10 Roberto Rey
> Hi,
>
> I'm runn
Hi,
I'm running some tests on EC2 cluster instances with 10 Gigabit Ethernet
hardware and I'm getting strange latency results with Netpipe and OpenMPI.
If I run Netpipe over OpenMPI (NPmpi) I get a network latency around 60
microseconds for small messages (less than 2kbytes). However, when I run
