Phi as OpenCL Device on HPC clusters

[Ming_L_]

I have a question on how to use Phi as OpenCL devices in HPC cluster. The HPC cluster I am using has 6 nodes, each node has one Intel CPU and two Phi's. Can I use MPI to fire up 6 processes, so that each process resides in a different node and use the Phi's in that node as OpenCL devices?

This is like a combination of MPI and OpenCL, so far, only process 0 can find its OpenCL platform, other processes cannot, I have tried several ways to fix the problem, like playing with mpirun, mpiexec, sbatch, srun, etc, they didn't work. Can anyone offer me some guidance? I am green in this area.   Thank you in advance 

[jimdempseyatthecove]

Can you ssh into each node (individually) and run an OpenCL non-MPI test application?

Jim Dempsey

[whitehat_t_Intel]

test

[Ming_L_]

I have tested ssh into individual nodes, it shows:

Access Denied: user mingli has no active jobs on this node.

Connection closed

Does the information means I cannot ssh into a specific node? 

[Ming_L_]

Must I have passwordless ssh access to each node in HPC cluster? Is this the necessary condition for nodes other than node 01 to find OpenCL platform?