Re: [OMPI users] MPI_THREAD_MULTIPLE question

[Barrett, Brian via users]

Yes, this is the case for Open MPI 4.x and earlier, due to various bugs.  When 
Open MPI 5.0 ships, we will resolve this issue.

Brian

On 9/9/22, 9:58 PM, "users on behalf of mrlong336 via users" 
mailto:users-boun...@lists.open-mpi.org> on 
behalf of users@lists.open-mpi.org> wrote:


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mpirun reports the following error:
The OSC pt2pt component does not support MPI_THREAD_MULTIPLE in this release.
Workarounds are to run on a single node, or to use a system with an RDMA
capable network such as Infiniband.

Does this error mean that the network must support RDMA if it wants to run 
distributed? Will Gigabit/10 Gigabit Ethernet work?



Best regards,

Timesir

mrlong...@gmail.com

Re: [OMPI users] MPI_THREAD_MULTIPLE question

[Joseph Schuchart via users]

Timesir,

It sounds like you're using the 4.0.x or 4.1.x release. The one-sided 
components were cleaned up in the upcoming 5.0.x release and the 
component in question (osc/pt2pt) was removed. You could also try to 
compile Open MPI 4.0.x/4.1.x against UCX and use osc/ucx (by passing 
`--mca osc ucx` to mpirun). In either case (using UCX or switching to 
5.0.x) you should be able to run MPI RMA codes without requiring an 
RDMA-capable network.


HTH
Joseph

On 9/10/22 06:55, mrlong336 via users wrote:

*mpirun reports the following error:
*The OSC pt2pt component does not support MPI_THREAD_MULTIPLE in this 
release.

Workarounds are to run on a single node, or to use a system with an RDMA
capable network such as Infiniband.

*Does this error mean that the network must support RDMA if it wants 
to run distributed? Will Gigabit/10 Gigabit Ethernet work?

*



Best regards,

*Timesir*
*mrlong...@gmail.com

*

[OMPI users] MPI_THREAD_MULTIPLE question

[mrlong336 via users]

mpirun reports the following error:The OSC pt2pt component does not support MPI_THREAD_MULTIPLE in this release.Workarounds are to run on a single node, or to use a system with an RDMAcapable network such as Infiniband.Does this error mean that the network must support RDMA if it wants to run distributed? Will Gigabit/10 Gigabit Ethernet work? 







  









Best regards,Timesirmrlong...@gmail.com