On Jun 17, 2008, at 10:18 AM, Brad Benton wrote:
The main run-time parameters used are as follows:
- For scalable process launch
routed = binomial
Note that this is a new parameter for OMPI v1.3 -- it has to do with
how non-MPI communications are sent around (e.g., OMPI startup
coordination). More documentation will be coming along on the new
ORTE-level controls for v1.3.
- To reduce the overhead for IB connections:
btl_openib_receive_queues = P,128,64,32,32,32:S,2048,1024,128,32:S,
12288,1024,128,32:S,65536,1024,128,32
This is also a new parameter for v1.3 -- see the "sneak peak" v1.3
screencast in the videos section (in the OpenFabrics subsection) on
the OMPI web site for a description of what it is/does.
- Bind processes to computational cores:
opal_paffinity_alone = 1
- Leave buffers pinned and registered
mpi_leave_pinned = 1
These params exist in v1.2.
--
Jeff Squyres
Cisco Systems
