Hi,
Simple query:
I am running a LAM(7.1.1) application on Linux(RH7_IA32)/GM2 with
the memory manager off.
The LAM-"Installation Guide suggests configuring LAM with
"-with-memory-manager=external" and then defining your own "sbrk"-routine.
Alternatively, is it OK to configure LAM with "--with-memory-manager=none"
and then use the MPI_ALLOC_MEM/MPI_FREE_MEM routines to allocate/deallocate
any MPI-send/recieve buffers? I assume these routines automatically pin/upin
memory when runing in "gm-mode"(or ib)?
Have tried the above, seems to work. However, I also tried using non-MPI
allocate/deallocate routines for MPI-send/recieve buffers and still
works OK ->
was under the impression freeing buffers without explicitly unpinning
memory is
liable to fail? - worried this might have worked by luck.
Side-question: If I allocate an array BUFFER and then MPI-send/recieve
this BUFFER in sub-sections - is it sufficient to MPI_ALLOC_MEM/FREE BUFFER
and not have to MPI_ALLOC_MEM/FREE each subsection sent/recieved?
Thanks in advance.
Philip
--
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Phil Mason
Software Development Engineer
Ricardo Consulting Engineers Ltd
Email - Philip.Mason_at_[hidden]
Tel: 01273 794914
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