[MPICH] Confused about compiling/using mpich2

[Rajeev Thakur]

To see if your MPICH2 build works, you can run "make testing" in the
top-level mpich2 directory. That will run the entire test suite in test/mpi
(can take an hour or more). 
 
Rajeev


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From: Gaetano Bellanca [mailto:gaetano.bellanca at unife.it] 
Sent: Thursday, January 10, 2008 6:37 PM
To: Rajeev Thakur
Cc: mpich-discuss at mcs.anl.gov
Subject: RE: [MPICH] Confused about compiling/using mpich2


Hi,
sorry  for the delay in answering. I made some tests.

I'm using 'module' to set the environment. Therefore, I'm rather sure that
when I'm using mpich, everything of mpich2 is not used and vice-versa (I
have incompatibilities declared in the module loading procedures).

But it is true what you said! When I run the code compiled with mpich2 with
mpirun of mpich (mpirun -n 2 ), the code run but not with 2 processes. The
only way I have to run 2 processes without any error is compiling with
mpich1.2.7p1 and running it with mpirun of this version. In this case, I
have 2 processes running!

Both mpirun and mpiexec of mpich2 causes the code to die when trying to do a
simple MPI_SEND and MPI_RECV.
Then, I changed my way of using mpd. Before I used a ring started by root at
boot. Now, using mpd from my user, I don't have a crash of the code, but it
waits undefinitely during the MPI_SEND and MPI_RECV procedures.

Maybe I'm wrong in something relevant to the use of mpich2 on a single
machine with dual core. There is something that I have not understood.

Unfortunately, I don't have my cluster (10 single core single processors)
available at this moment. I'm running on a single machine with dual core
athlon (ubuntu linux 7.10). 
I cannot say anything about a simulation on a real cluster, for the moment.

Regards.

Gaetano



At 22.08 08/01/2008, you wrote:


If your code is compiled with MPICH2, it shouldn't run with MPICH-1's
mpirun. Make sure that all your code is compiled with the compile scripts
from MPICH2 and there are no mpif.h files from MPICH-1 in any of your source
directories.
 
Rajeev



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From: owner-mpich-discuss at mcs.anl.gov [
<mailto:owner-mpich-discuss at mcs.anl.gov>
mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Gaetano Bellanca


Sent: Monday, January 07, 2008 12:16 PM


To: mpich-discuss at mcs.anl.gov


Subject: Re: [MPICH] Confused about compiling/using mpich2



Dear Darius,



thank you for your answer. But I'm not sure this is the problem. In fact,
MPI_Finalize is far from the point where the code is stopped by this error,
and there are a lot of other routines before the end of the program.
Moreover my code works works with MPICH1.2.7p1 (without this problem) and
also with MPICH2 (if i run it with mpirun of the mpich1.2.7p1 instead of
mpiexec or mpirun of MPICH2).



I'm rather confused about that .... maybe I'm doing something wrong in using
mpiexec. 



Regards.



Gaetano



  _____  

Gaetano Bellanca - Department of Engineering - University of Ferrara  


Via Saragat, 1 - 44100 - Ferrara - ITALY             


Voice (VoIP):  +39 0532 974809     Fax:  +39 0532 974870


mailto:gaetano.bellanca at unife.it 


  _____  





  _____  

Gaetano Bellanca - Department of Engineering - University of Ferrara  
Via Saragat, 1 - 44100 - Ferrara - ITALY             
Voice (VoIP):  +39 0532 974809     Fax:  +39 0532 974870
mailto:gaetano.bellanca at unife.it 

  _____  


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