[mpich-discuss] MPICH2 for ARM

[Dave Goodell]

One way to isolate whether mpirun itself is failing or whether your helloWorld program is failing when run under mpirun is to run a non-MPI program (such as "ls" or "hostname") under mpirun.  There will still be a small slice of mpirun functionality that is not exercised in this case (PMI interactions), so it's not a perfect test, but it's another useful data point.

Also, to rule out the unlikely possibility of bugs in your "helloWorld" program, you should try running the "cpi" program that you can find in the "examples" directory of your build tree.

-Dave

On Nov 10, 2011, at 9:12 AM CST, Jeff Hammond wrote:

> I think it will help if you post config.log.
> 
> Can you run the test that fails within GDB or Valgrind?  I do not
> think that mpirun itself is segfaulting, but rather that it activates
> the code path that does.  Maybe this much was clear to you already.
> 
> Jeff
> 
> On Thu, Nov 10, 2011 at 3:33 AM, Harald Schuster
> <schuster at technikum-wien.at> wrote:
>> Hi
>> 
>> I use MPICH2 on my normal Linux PC and it works fine. My next goal is to run
>> MPICH2 on a arm926 (am1707) which is simulated in SimSoc and where a normal
>> linux OS is running. The linux is compiled with the buildroot 2010.05 and I
>> use the arm-linux-gcc 4.3.4. I tried to make the the mpich2 with the
>> arm-linux-gcc and it works. I used the following configuration:
>> 
>> CFLAGS="-static" CC=arm-linux-gcc ./../configure
>> --prefix=/mnt/ti_am1707_root/usr/mpich2-install --with-pm=hydra
>> --disable-f77 --disable-fc --disable-cxx --disable-sharedlibs
>> --host=arm-linux --with-device=ch3:sock
>> 
>> Also the make install process works fine. Then I compiled a small helloWorld
>> example with the mpicc for arm and it also works. When I run the helloWorld
>> example on the simulated processor I always got an segmentation fault. For
>> starting the program I use the following command:
>> 
>> mpirun -np 1 helloWorld
>> 
>> When I start the helloWorld program without the mpirun command I got the
>> right output. So I think the segmentation fault is caused by the mpirun
>> command but I don't know where and what I can do to solve the problem.
>> 
>> Best regards
>> Harald
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> 
> 
> 
> -- 
> Jeff Hammond
> Argonne Leadership Computing Facility
> University of Chicago Computation Institute
> jhammond at alcf.anl.gov / (630) 252-5381
> http://www.linkedin.com/in/jeffhammond
> https://wiki.alcf.anl.gov/index.php/User:Jhammond
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