Hi,
Thanks Nysal for these details.
I also fixed my memory allocation issue using environment variable
OMPI_MCA_memory_ptmalloc2_disable which is much more easier (at least in my
case) than compiled new openmpi package and install that new package.
The point is that it is a bit complicated to
>What does it exactly imply to compile with this option ?
Open MPI's internal malloc library (ptmalloc) will not be built/used. If you
are using an RDMA capable interconnect such as Infiniband, you will not be
able to use the "mpi_leave_pinned" feature. mpi_leave_pinned might improve
performance
building openmpi with option "--without-memory-manager" fix my problem.
What does it exactly imply to compile with this option ?
I guess all malloc use functions from libc instead of openmpi one, but does
it have an effect on performance or something else ?
Nicolas
2010/8/8 Nysal Jan
What interconnect are you using? Infiniband? Use "--without-memory-manager"
option while building ompi in order to disable ptmalloc.
Regards
--Nysal
On Sun, Aug 8, 2010 at 7:49 PM, Nicolas Deladerriere <
nicolas.deladerri...@gmail.com> wrote:
> Yes, I'am using 24G machine on 64 bit Linux OS.
>
Yes, I'am using 24G machine on 64 bit Linux OS.
If I compile without wrapper, I did not get any problems.
It seems that when I am linking with openmpi, my program use a kind of
openmpi implemented malloc. Is it possible to switch it off in order ot only
use malloc from libc ?
Nicolas
2010/8/8
You're trying to do a 6GB allocate. Can your underlying system handle
that? IF you compile without the wrapper, does it work?
I see your executable is using the OMPI memory stuff. IIRC there are
switches to turn that off.
On Fri, 2010-08-06 at 15:05 +0200, Nicolas Deladerriere wrote:
>
