Apologies for not saying what latency is with Open MPI. I've noted it below.
I don't know why turning off the sm feature would help launching 1ppn. I just
tried turning it off and it didn't make a difference.
On Wed, 6 Jun 2007, George Bosilca wrote:
> Which one is the latency with Open MPI ? Which version of Open MPI ?
> You might want to use OMPI_MCA_btl=mx,self to see if it makes any
> On Jun 6, 2007, at 12:26 PM, Maestas, Christopher Daniel wrote:
>> With 2 nodes using 1.1.7 with the patch we measured (using mpich-mx
Open MPI 1.2.2
>> With mx 1.2.1-rc18 we measure:
>> 3.69 us
>> And with mpich-mx 1.2.7..4 we see:
>> Our Open MPI settings:
>> # env | grep OMPI
>> Does anyone know why the latency would be slightly higher using
>> Open MPI
>> versus MPICH-MX?
>> users mailing list