hello,
i would like to get your input on this:
when launching a parallel computation on 128 nodes using openib and
the "-mca btl_openib_receive_queues P,65536,256,192,128" option, i
observe a rather large resident memory consumption (2GB: 65336*256*128)
on the process with rank 0 (and only this process) just after a call to
MPI_Init.
i'd like to know why the other processes doesn't behave the same:
- other processes located on the same nodes don't use that amount of memory
- all others processes (i.e. located on any other nodes) neither
i'm using OpenMPI-1.4.2, built with gcc-4.3.4 and
'--enable-cxx-exceptions --with-pic --with-threads=posix' options.
thanks for your help,
éloi
--
Eloi Gaudry
Senior Product Development Engineer
Free Field Technologies
Company Website: http://www.fft.be
Direct Phone Number: +32 10 495 147
