it varies with the receive_queues specification *and* with the number of
mpi processes: memory_consumed = nb_mpi_process * nb_buffers *
(buffer_size + low_buffer_count_watermark + credit_window_size )
On 04/22/2011 12:26 AM, Jeff Squyres wrote:
> Does it vary exactly according to your receive_queues specification?
> On Apr 19, 2011, at 9:03 AM, Eloi Gaudry wrote:
>> 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,
>> Eloi Gaudry
>> Senior Product Development Engineer
>> Free Field Technologies
>> Company Website: http://www.fft.be
>> Direct Phone Number: +32 10 495 147
>> users mailing list
Senior Product Development Engineer
Free Field Technologies
Company Website: http://www.fft.be
Direct Phone Number: +32 10 495 147