This FAQ is for Open MPI v4.x and earlier.
If you are looking for documentation for Open MPI v5.x and later, please visit docs.open-mpi.org.
Table of contents:
- What InfiniBand-based components does Open MPI have?
- How do I specify to use the InfiniBand network for MPI messages?
- But wait — I also have a TCP network. Do I need to explicitly
disable the TCP BTL?
- How do I know what MCA parameters are available for tuning MPI performance?
- I'm getting errors about "error registering openib memory";
what do I do?
- I'm still getting errors about "error registering openib memory"; what do I do?
- I'm getting "ibv_create_qp: returned 0 byte(s) for max inline
data" errors; what is this, and how do I fix it?
- My bandwidth seems [far] smaller than it should be; why? Can this be fixed?
- How do I tune small messages in Open MPI v1.1 and later versions?
- 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.
|
