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FAQ:

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Table of contents:

  1. What InfiniBand-based components does Open MPI have?
  2. How do I specify to use the InfiniBand network for MPI messages?
  3. But wait -- I also have a TCP network. Do I need to explicitly disable the TCP BTL?
  4. How do I know what MCA parameters are available for tuning MPI performance?
  5. I'm getting errors about "error registering openib memory"; what do I do?
  6. I'm still getting errors about "error registering openib memory"; what do I do?
  7. I'm getting "ibv_create_qp: returned 0 byte(s) for max inline data" errors; what is this, and how do I fix it?
  8. My bandwidth seems [far] smaller than it should be; why? Can this be fixed?
  9. How do I tune small messages in Open MPI v1.1 and later versions?
  10. I get bizarre linker warnings / errors / run-time faults when I try to compile my OpenIB / OFED MPI application staticaly. How do I fix this?


1. What InfiniBand-based components does Open MPI have?

This FAQ entry has moved here.


2. How do I specify to use the InfiniBand network for MPI messages?

This FAQ entry has moved here.


3. But wait -- I also have a TCP network. Do I need to explicitly disable the TCP BTL?

This FAQ entry has moved here.


4. How do I know what MCA parameters are available for tuning MPI performance?

This FAQ entry has moved here.


5. I'm getting errors about "error registering openib memory"; what do I do?

This FAQ entry has moved here.


6. I'm still getting errors about "error registering openib memory"; what do I do?

This FAQ entry has moved here.


7. I'm getting "ibv_create_qp: returned 0 byte(s) for max inline data" errors; what is this, and how do I fix it?

This FAQ entry has moved here.


8. My bandwidth seems [far] smaller than it should be; why? Can this be fixed?

This FAQ entry has moved here.


9. How do I tune small messages in Open MPI v1.1 and later versions?

This FAQ entry has moved here.


10. I get bizarre linker warnings / errors / run-time faults when I try to compile my OpenIB / OFED MPI application staticaly. How do I fix this?

This FAQ entry has moved here.