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From: George Bosilca (bosilca_at_[hidden])
Date: 2007-10-17 12:24:53


The CM PML only support networks that do matching in hardware. In
Open MPI temrs, the CM PML require one of the MTL (instead of the BTL
for all others PML). For a full list of supported networks, one can
list the content of the ompi/mca/mtl directory (right now: Myrinet,
Portals and QSLogic).

If your environment do not dispose of any of these networks, then CM
cannot be used. Moreover, as you force the PML to CM on the command
line, as CM fails to load, Open MPI give up claiming that no PML were
found.

   Thanks,
     george.

On Oct 17, 2007, at 12:02 PM, Sajjad Tabib wrote:

>
> Hi,
>
> I am trying to use the cm component from pml, but when I execute
> the command: "mpirun -np 2 --mca pml cm ompi_test", I get the error
> message that "No available pml components were found". I did a
> ompi_info to see if the cm component exist, and it does. The output
> of ">ompi_info | grep cm" was "MCA pml: cm (MCA v1.0, API v1.0,
> Component v1.3)". I have also set my LD_LIBRARY_PATH as instructed
> by the FAQs. I have even reconfigured and rebuilt open-mpi, but
> that didn't fix the problem either. I am wondering whether a
> process on my system could interfere with opening the cm component.
> I don't know the answer to this, but thought that I should throw it
> out there.
> Anyways, I am not sure what to do next to troubleshoot this problem
> and was hoping that somebody could give me pointers on what might
> be wrong or what I could check/do next.
>
> Thank You,
>
> Sajjad Tabib
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