Re: [OMPI users] Problem with C++ Binding

Mon, 16 Oct 2006 10:59:24 -0400 

Correction.  :-(
Upgrading the version of the Intel compiler worked on one platform that I tested on, but not others. So it looks like this is still an open issue. 


On Oct 11, 2006, at 1:46 AM, Jeff Squyres wrote:


Tobias / all --


I swear there were further mails about this topic, but perhaps they  
were

off-list.


The end result is that this has finally been confirmed as an Intel  
9.1 C++
compiler bug.  I don't know exactly what platforms it occurred on,  
but I was
eventually able to replicate Tobias' problem on an EM64T machine  
running

RHEL4U3.  The problem was that the compiler was not initializing some
private members of global C++ objects properly (e.g., the underlying
MPI_Comm in MPI::COMM_WORLD).


Intel released a new version of the 9.1 C++ compiler last week (Oct  
5, 2006,
build 44).  This new version of the compiler now seems to  
initialize data
members properly, and C++ applications (including the trivial  
"hello world"

that Tobias ran into problems with) seem to be working fine now.

So: please upgrade your version of the Intel compilers if you can.



On 9/1/06 8:33 AM, "Jeff Squyres" <jsquy...@cisco.com> wrote:


Tobias --

I am unfortunately unable to replicate your problem.  :-(


Can you confirm that you're getting the "right" mpi.h?  That's the  
most

obvious problem that I can think of.


If it seems to be right, can you compile your program with  
debugging enabled
and step through it with a debugger?  A trivial program like this  
does not
need to be started via mpirun -- you should be able to just launch  
it directly

in a debugger (e.g., put a breakpoint in main() and step into
MPI::COMM_WORLD.Get_rank()).


OMPI's C++ bindings are layered on top of the C bindings, so you  
should step
into an inlined C++ function that calls MPI_Comm_rank(), and see  
if the

communicator that it was invoked with is, indeed, MPI_COMM_WORLD.



On 8/31/06 2:26 AM, "Tobias Graf" <tg...@hydra.t.u-tokyo.ac.jp>  
wrote:



Dear List,


I was trying to use the C++ binding of OpenMPI, but unfortunately  
I ran
into a problem. I'm trying to use MPI::COMM_WORLD, but I always  
get the

following error message when I try to run it (compiling works fine):

*** An error occurred in MPI_Comm_rank
*** on communicator MPI_COMM_WORLD
*** MPI_ERR_COMM: invalid communicator
*** MPI_ERRORS_ARE_FATAL (goodbye)
[0,0,0]-[0,1,0] mca_oob_tcp_msg_recv: readv failed with errno=104
1 additional process aborted (not shown)

The code I'm trying to use is:
----------------------------------------------------
// testcpp.cpp
// mpic++ testcpp.cpp -o testcpp
// mpiexec -np 2 ./testcpp

#include "mpi.h"
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int process_id;   // rank of process
    int process_num;  // total number of processes

    MPI::Init ( argc, argv );
    process_id = MPI::COMM_WORLD.Get_rank ();
    process_num = MPI::COMM_WORLD.Get_size ();

    cout << process_id+1 << "/" << process_num << endl;
    MPI::Finalize();
}
----------------------------------------------------

A similar program using the normal C interface (also compiled with
mpic++) works fine (File: testc.cpp).

For this example I'm using the Intel C/C++ V9.1 compiler on Linux
(Ubuntu 5.10). I compiled openmpi by myself, so maybe something went

wrong there. I added config.log and also the output from  
ompi_info. If

necessary, I can also provide a capture of the configuration,
compilation and installation process.

Best Regards,
Tobias




                Open MPI: 1.1.1
   Open MPI SVN revision: r11473
                Open RTE: 1.1.1
   Open RTE SVN revision: r11473
                    OPAL: 1.1.1
       OPAL SVN revision: r11473
                  Prefix: /opt/libs/openmpi-1.1.1_intel9.1
 Configured architecture: i686-pc-linux-gnu
           Configured by: tgraf
           Configured on: Thu Aug 31 14:52:07 JST 2006
          Configure host: tobias
                Built by: tgraf
                Built on: Thu Aug 31 15:05:52 JST 2006
              Built host: tobias
              C bindings: yes
            C++ bindings: yes
      Fortran77 bindings: yes (all)
      Fortran90 bindings: yes
 Fortran90 bindings size: small
              C compiler: icc
     C compiler absolute: /opt/intel/cc/9.1.042/bin/icc
            C++ compiler: icpc
   C++ compiler absolute: /opt/intel/cc/9.1.042/bin/icpc
      Fortran77 compiler: ifort
  Fortran77 compiler abs: /opt/intel/fc/9.1.036/bin/ifort
      Fortran90 compiler: ifort
  Fortran90 compiler abs: /opt/intel/fc/9.1.036/bin/ifort
             C profiling: yes
           C++ profiling: yes
     Fortran77 profiling: yes
     Fortran90 profiling: yes
          C++ exceptions: no
          Thread support: posix (mpi: no, progress: no)
  Internal debug support: no
     MPI parameter check: runtime
Memory profiling support: no
Memory debugging support: no
         libltdl support: yes

              MCA memory: ptmalloc2 (MCA v1.0, API v1.0,  
Component v1.1.1)
           MCA paffinity: linux (MCA v1.0, API v1.0, Component  
v1.1.1)
           MCA maffinity: first_use (MCA v1.0, API v1.0,  
Component v1.1.1)
               MCA timer: linux (MCA v1.0, API v1.0, Component  
v1.1.1)

           MCA allocator: basic (MCA v1.0, API v1.0, Component v1.0)

           MCA allocator: bucket (MCA v1.0, API v1.0, Component  
v1.0)
                MCA coll: basic (MCA v1.0, API v1.0, Component  
v1.1.1)
                MCA coll: hierarch (MCA v1.0, API v1.0, Component  
v1.1.1)
                MCA coll: self (MCA v1.0, API v1.0, Component  
v1.1.1)

                MCA coll: sm (MCA v1.0, API v1.0, Component v1.1.1)

                MCA coll: tuned (MCA v1.0, API v1.0, Component  
v1.1.1)
                  MCA io: romio (MCA v1.0, API v1.0, Component  
v1.1.1)

               MCA mpool: sm (MCA v1.0, API v1.0, Component v1.1.1)
                 MCA pml: ob1 (MCA v1.0, API v1.0, Component v1.1.1)
                 MCA bml: r2 (MCA v1.0, API v1.0, Component v1.1.1)
              MCA rcache: rb (MCA v1.0, API v1.0, Component v1.1.1)

                 MCA btl: self (MCA v1.0, API v1.0, Component  
v1.1.1)

                 MCA btl: sm (MCA v1.0, API v1.0, Component v1.1.1)
                 MCA btl: tcp (MCA v1.0, API v1.0, Component v1.0)

                MCA topo: unity (MCA v1.0, API v1.0, Component  
v1.1.1)

                 MCA osc: pt2pt (MCA v1.0, API v1.0, Component v1.0)

                 MCA gpr: null (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA gpr: proxy (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA gpr: replica (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA iof: proxy (MCA v1.0, API v1.0, Component  
v1.1.1)

                 MCA iof: svc (MCA v1.0, API v1.0, Component v1.1.1)

                  MCA ns: proxy (MCA v1.0, API v1.0, Component  
v1.1.1)
                  MCA ns: replica (MCA v1.0, API v1.0, Component  
v1.1.1)

                 MCA oob: tcp (MCA v1.0, API v1.0, Component v1.0)

                 MCA ras: dash_host (MCA v1.0, API v1.0,  
Component v1.1.1)
                 MCA ras: hostfile (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA ras: localhost (MCA v1.0, API v1.0,  
Component v1.1.1)
                 MCA ras: slurm (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA rds: hostfile (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA rds: resfile (MCA v1.0, API v1.0, Component  
v1.1.1)
               MCA rmaps: round_robin (MCA v1.0, API v1.0,  
Component v1.1.1)
                MCA rmgr: proxy (MCA v1.0, API v1.0, Component  
v1.1.1)

                MCA rmgr: urm (MCA v1.0, API v1.0, Component v1.1.1)
                 MCA rml: oob (MCA v1.0, API v1.0, Component v1.1.1)

                 MCA pls: fork (MCA v1.0, API v1.0, Component  
v1.1.1)

                 MCA pls: rsh (MCA v1.0, API v1.0, Component v1.1.1)

                 MCA pls: slurm (MCA v1.0, API v1.0, Component  
v1.1.1)

                 MCA sds: env (MCA v1.0, API v1.0, Component v1.1.1)

                 MCA sds: seed (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA sds: singleton (MCA v1.0, API v1.0,  
Component v1.1.1)
                 MCA sds: pipe (MCA v1.0, API v1.0, Component  
v1.1.1)
                 MCA sds: slurm (MCA v1.0, API v1.0, Component  
v1.1.1)

// testc.cpp
// mpic++ testc.cpp -o testc
// mpiexec -np 2 ./testc

#include "mpi.h"
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int process_id;   // rank of process
    int process_num;  // total number of processes

    MPI_Init(&argc,&argv);
    MPI_Comm_size(MPI_COMM_WORLD,&process_num);
    MPI_Comm_rank(MPI_COMM_WORLD,&process_id);

    cout << process_id+1 << "/" << process_num << endl;
    MPI_Finalize();
}
// testcpp.cpp
// mpic++ testcpp.cpp -o testcpp
// mpiexec -np 2 ./testcpp

#include "mpi.h"
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int process_id;   // rank of process
    int process_num;  // total number of processes

    MPI::Init ( argc, argv );
    process_id = MPI::COMM_WORLD.Get_rank ();
    process_num = MPI::COMM_WORLD.Get_size ();

    cout << process_id+1 << "/" << process_num << endl;
    MPI::Finalize();
}
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--
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems




--
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems























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