To followup for the web archives -- we discussed this more off-list.
AFAIK, compiling Open MPI -- including its memory registration cache
-- works fine in 32 bit mode, even on 64 bit platforms (there was some
confusion between virtual and physical memory addresses and who uses
what [OMPI *only* sees virtual memory addresses because it's user-
space code]).
On Jan 13, 2009, at 2:48 PM, Jeff Squyres wrote:
On Jan 13, 2009, at 7:37 AM, Alex A. Granovsky wrote:
Am I correct assuming that OpenMPI memory registration/cache module
is completely broken by design on any 32-bit system allowing
physical address space larger than 4 GB, and especially when
compiled for 32-bit under 64-bit OS (e.g., Linux)?
I'm not sure what you mean -- OMPI 32 bit builds on a 64 bit system
should be ok...? Have you found a problem?
--
Jeff Squyres
Cisco Systems
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Jeff Squyres
Cisco Systems
