Using ARMCI directly

When to use it?

• Need 1-sided communication w/o the GA infrastructure

• programmer manages distributed data structures

Advantages

• Good performance

  • e.g., 5uS latency, 320MB/s bandwidth on the NERSC Cray T3E

• Simple programming model (unlike MPI-2 1-sided)

Limitations

• Requires a message passing library to run (MPI,PVM,TCGMSG)

• Only C interfaces exist

• Memory allocation via ARMCI_Malloc

Previous slide

Next slide

Back to first slide

View graphic version