for the purpose of determining how much memory to pin for RDMA message transfers on InfiniBand and Myrinet GM. The value determined by
%export MPI_PHYSICAL_MEMORY=1048576
The above example specifies that the system has 1GB of physical memory.
8.9.5 MPI_PIN_PERCENTAGE
MPI_PIN_PERCENTAGE communicates the maximum percentage of physical memory (see MPI_PHYSICAL_MEMORY above) that can be pinned at any time. The default is 20%.
%export MPI_PIN_PERCENTAGE=30
The above example permits the
or Myrinet GM is in use.
8.9.6 MPI_PAGE_ALIGN_MEM
MPI_PAGE_ALIGN_MEM causes the
%export MPI_PAGE_ALIGN_MEM=1
For more information on when this setting should be used, refer to the
8.9.7 MPI_MAX_WINDOW
MPI_MAX_WINDOW is used for
%export MPI_MAX_WINDOW=10
8.9.8MPI_ELANLOCK
By default,
%export MPI_ELANLOCK=0
8.9.9MPI_USE_LIBELAN
By default when Elan is in use, the
Using