source: pypar/contrib/Dreed.reply @ 506

Hi Ole,

Yes, that appears to work - no more segmentation faults:

mpirun -np 2 python demo.py
MPI initialised OK with 2 processors
I am proc 0 of 2 on node fourier
I am proc 1 of 2 on node hopper
Processor 0 sending message "MSGP0" to processor 1
Processor 1 received message "MSGP0" from processor 0
Size of msg was 5 bytes
Processor 1 sending msg "MSGP0->P1" to 0
Processor 0 received message "MSGP0->P1" from processor 1
Size of msg was 9 bytes

Thanks!

Dave



> Date: Sat, 30 Aug 2003 19:47:39 +1000
> Reply-To: Ole.Nielsen@anu.edu.au
> Content-Type: text/plain; charset=us-ascii
> Content-Disposition: inline
> User-Agent: Mutt/1.5.4i
> From: ole@cuttlefish.anu.edu.au (Ole Moller Nielsen)
> Content-Length: 9270
> 
> 
> Hello Dave
> 
> Regarding your problem I may have the solution (thanks to input from Doug Orr).
> It seems that newer versions of LAM require the last commandline argument to be NULL
> so try to modify mpiext.c as follows around line 472 and let me know if it works for you.
> The symbol + means add the line and - means remove the line.
> 
> Cheers
> Ole
> 
> ----PATCH for mpiext.c
> 
> /* Reconstruct C-commandline */
> /*                           */
> argc = PyList_Size(input); //Number of commandline arguments
> - argv = (char**) malloc((argc)*sizeof(char*));
> + argv = (char**) malloc((argc+1)*sizeof(char*));
>      
> for (i=0; i<argc; i++)
>   argv[i] = PyString_AsString( PyList_GetItem(input, i) );
>          
> + argv[i] = NULL;
> 
> -------------------------------          
> 
> 
> 
>               
> On Tue, Aug 05, 2003 at 11:14:20AM -0400, Dave Reed wrote:
> > 
> > Hi,
> > 
> > I'm trying to install the lam-7.0 version of MPI and pypar on a
> > Solaris 9 system for one of my colleagues. I've got lam-7.0 working
> > fine (successfully ran one of its test cases). I then installed pypar
> > 1.6.4 using:
> > 
> > python setup.py build
> > python setup.py install
> > 
> > and that worked without any errors; however, I can't seem to get any
> > of the examples to work.
> > 
> > Details of the system are:
> > relevant details of the system are:
> > Solaris 9, gcc 3.2.3, python 2.3, Numeric-23.0
> > 
> > When I try:
> > 
> > mpirun -np 2 python demo.py 
> > -----------------------------------------------------------------------------
> > It seems that [at least] one of the processes that was started with
> > mpirun did not invoke MPI_INIT before quitting (it is possible that
> > more than one process did not invoke MPI_INIT -- mpirun was only
> > notified of the first one, which was on node n0).
> > 
> > mpirun can *only* be used with MPI programs (i.e., programs that
> > invoke MPI_INIT and MPI_FINALIZE).  You can use the "lamexec" program
> > to run non-MPI programs over the lambooted nodes.
> > -----------------------------------------------------------------------------
> > 
> > mpirun C python demo.py
> > 
> > produces the same results.
> > 
> > mpirun C hello
> > 
> > runs the hello demo that comes with lam-7.0 fine.
> > 
> > when I execute:
> > python
> > import pypar
> > 
> > I get a segmentation fault. Here's the backtrace
> > 
> > #0  0xfef33400 in strlen () from /usr/lib/libc.so.1
> > #1  0xfece5c40 in sfh_argv_dup ()
> >    from /usr/local/lib/python2.3/site-packages/pypar/mpiext.so
> > #2  0xfece67b0 in ao_parse ()
> >    from /usr/local/lib/python2.3/site-packages/pypar/mpiext.so
> > #3  0xfecb7be0 in lam_linit ()
> >    from /usr/local/lib/python2.3/site-packages/pypar/mpiext.so
> > #4  0xfecb82fc in lam_mpi_init ()
> >    from /usr/local/lib/python2.3/site-packages/pypar/mpiext.so
> > #5  0xfecb5a70 in MPI_Init ()
> >    from /usr/local/lib/python2.3/site-packages/pypar/mpiext.so
> > #6  0xfecb4a08 in init (self=0x1, args=0xffbfc7e0) at lib/pypar/mpiext.c:480
> > #7  0xff25b340 in PyCFunction_Call (func=0xc5620, arg=0xc6650, kw=0x0)
> >     at Objects/methodobject.c:93
> > #8  0xff29a39c in call_function (pp_stack=0xffbfc968, oparg=1)
> >     at Python/ceval.c:3439
> > #9  0xff297694 in eval_frame (f=0x9a8f0) at Python/ceval.c:2116
> > #10 0xff2987a8 in PyEval_EvalCodeEx (co=0xbf9a0, globals=0x1, locals=0x0, 
> >     args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, 
> >     closure=0x0) at Python/ceval.c:2663
> > #11 0xff294c34 in PyEval_EvalCode (co=0xbf9a0, globals=0x0, locals=0xbc5d0)
> >     at Python/ceval.c:537
> > #12 0xff2bd2fc in PyImport_ExecCodeModuleEx (name=0xffbfd558 "pypar.pypar", 
> >     co=0xbf9a0, 
> >     pathname=0xffbfcb70 "/usr/local/lib/python2.3/site-packages/pypar/pypar.pyc") at Python/import.c:621
> > #13 0xff2c016c in load_source_module (name=0xffbfd558 "pypar.pypar", 
> >     pathname=0xffbfcb70 "/usr/local/lib/python2.3/site-packages/pypar/pypar.pyc", fp=0x22e8) at Python/import.c:894
> > #14 0xff2bdf64 in load_module (name=0xffbfd558 "pypar.pypar", fp=0xfefc02b4, 
> >     buf=0xffbfd068 "/usr/local/lib/python2.3/site-packages/pypar/pypar.py", 
> >     type=1, loader=0x0) at Python/import.c:1699
> > #15 0xff2bf104 in import_submodule (mod=0xbb1b0, subname=0xffbfd55e "pypar", 
> >     fullname=0xffbfd558 "pypar.pypar") at Python/import.c:2290
> > #16 0xff2bebd4 in load_next (mod=0xbb1b0, altmod=0xff318028, 
> >     p_name=0xffbfd55e, buf=0xffbfd558 "pypar.pypar", p_buflen=0xffbfd554)
> >     at Python/import.c:2111
> > #17 0xff2c0890 in import_module_ex (name=0x0, globals=0xbb1b0, locals=0x48d20, 
> >     fromlist=0x45590) at Python/import.c:1957
> > #18 0xff2be7e8 in PyImport_ImportModuleEx (name=0xbb1f4 "pypar", 
> >     globals=0x48d20, locals=0x48d20, fromlist=0x45590) at Python/import.c:1998
> > #19 0xff28cda0 in builtin___import__ (self=0x0, args=0xbb1f4)
> >     at Python/bltinmodule.c:45
> > #20 0xff25b340 in PyCFunction_Call (func=0x29e68, arg=0xb3f60, kw=0x0)
> >     at Objects/methodobject.c:93
> > #21 0xff22e090 in PyObject_Call (func=0x29e68, arg=0xb3f60, kw=0x0)
> >     at Objects/abstract.c:1755
> > #22 0xff299f84 in PyEval_CallObjectWithKeywords (func=0x29e68, arg=0xb3f60, 
> >     kw=0x0) at Python/ceval.c:3346
> > #23 0xff29740c in eval_frame (f=0xf71d0) at Python/ceval.c:1996
> > #24 0xff2987a8 in PyEval_EvalCodeEx (co=0xacee0, globals=0x1, locals=0x0, 
> >     args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, 
> >     closure=0x0) at Python/ceval.c:2663
> > #25 0xff294c34 in PyEval_EvalCode (co=0xacee0, globals=0x0, locals=0x48d20)
> >     at Python/ceval.c:537
> > #26 0xff2bd2fc in PyImport_ExecCodeModuleEx (name=0xffbfed28 "pypar", 
> >     co=0xacee0, 
> >     pathname=0xffbfde48 "/usr/local/lib/python2.3/site-packages/pypar/__init__.pyc") at Python/import.c:621
> > #27 0xff2c016c in load_source_module (name=0xffbfed28 "pypar", 
> >     pathname=0xffbfde48 "/usr/local/lib/python2.3/site-packages/pypar/__init__.pyc", fp=0x22e8) at Python/import.c:894
> > #28 0xff2bdf64 in load_module (name=0xffbfed28 "pypar", fp=0xfefc02a4, 
> >     buf=0xffbfe340 "/usr/local/lib/python2.3/site-packages/pypar/__init__.py", 
> >     type=1, loader=0x0) at Python/import.c:1699
> > #29 0xff2c0624 in load_package (name=0xffbfed28 "pypar", pathname=0xb2338 "")
> >     at Python/import.c:951
> > #30 0xff2be11c in load_module (name=0xffbfed28 "pypar", fp=0x0, 
> >     buf=0xffbfe838 "/usr/local/lib/python2.3/site-packages/pypar", type=5, 
> >     loader=0x0) at Python/import.c:1722
> > #31 0xff2bf104 in import_submodule (mod=0xff318028, 
> >     subname=0xffbfed28 "pypar", fullname=0xffbfed28 "pypar")
> >     at Python/import.c:2290
> > #32 0xff2bebd4 in load_next (mod=0xff318028, altmod=0xff318028, 
> >     p_name=0xffbfed28, buf=0xffbfed28 "pypar", p_buflen=0xffbfed24)
> >     at Python/import.c:2111
> > #33 0xff2c0890 in import_module_ex (name=0x0, globals=0xff318028, 
> >     locals=0x3a9c0, fromlist=0xff318028) at Python/import.c:1957
> > #34 0xff2be7e8 in PyImport_ImportModuleEx (name=0xbb1f4 "pypar", 
> >     globals=0x3a9c0, locals=0x3a9c0, fromlist=0xff318028)
> >     at Python/import.c:1998
> > #35 0xff28cda0 in builtin___import__ (self=0x0, args=0xbb1f4)
> >     at Python/bltinmodule.c:45
> > #36 0xff25b340 in PyCFunction_Call (func=0x29e68, arg=0x39900, kw=0x0)
> >     at Objects/methodobject.c:93
> > #37 0xff22e090 in PyObject_Call (func=0x29e68, arg=0x39900, kw=0x0)
> >     at Objects/abstract.c:1755
> > #38 0xff299f84 in PyEval_CallObjectWithKeywords (func=0x29e68, arg=0x39900, 
> >     kw=0x0) at Python/ceval.c:3346
> > #39 0xff29740c in eval_frame (f=0xedb78) at Python/ceval.c:1996
> > #40 0xff2987a8 in PyEval_EvalCodeEx (co=0xb0ce0, globals=0x0, locals=0x0, 
> >     args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, 
> >     closure=0x0) at Python/ceval.c:2663
> > #41 0xff294c34 in PyEval_EvalCode (co=0xb0ce0, globals=0x0, locals=0x3a9c0)
> >     at Python/ceval.c:537
> > #42 0xff2caf3c in run_node (n=0x2a140, filename=0x3a9c0 "", globals=0x3a9c0, 
> >     locals=0x3a9c0, flags=0x3a9c0) at Python/pythonrun.c:1205
> > #43 0xff2ca000 in PyRun_InteractiveOneFlags (fp=0xffffffff, 
> >     filename=0xff2fed08 "<stdin>", flags=0xffbff79c) at Python/pythonrun.c:697
> > #44 0xff2c9d60 in PyRun_InteractiveLoopFlags (fp=0xfefc0274, 
> >     filename=0xff2fed08 "<stdin>", flags=0xffbff79c) at Python/pythonrun.c:630
> > #45 0xff2c9cac in PyRun_AnyFileExFlags (fp=0xfefc0274, 
> >     filename=0xff2fed08 "<stdin>", closeit=0, flags=0xffbff79c)
> >     at Python/pythonrun.c:593
> > #46 0xff2d2a08 in Py_Main (argc=5120, argv=0x16bc) at Modules/main.c:415
> > 
> > 
> > Any suggestions or ideas for getting this working?
> > 
> > Thanks,
> > Dave
> > 
> > -- 
> > David Reed, Ph.D.                   e-mail: dreed@capital.edu
> > Math/Computer Science Dept.         http://capital2.capital.edu/faculty/dreed
> > Capital University                  phone:  614-236-6133
> > 2199 E. Main St.                    fax:    614-236-6518
> > Columbus, OH 43209
> 
> -- 
> -------------------------------------------------------------------  
> Ole Nielsen                     | Email: Ole.Nielsen@anu.edu.au
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