Re: [Valgrind-users] valgrind and MPI wrappers

[R. C. <rkc...@lb...>]

Sean,

I have encountered the same problem. The problem lies in how command-line
arguments are parsed.

Have a look at the following webpage

https://csd.vpac.org/twiki/bin/view/Tech/ParallelDebugging#Using_valgrind_with_MPICH_to_che

which gives instructions on getting valgrind to work with mpich. The upshot
is that you will have to create a mpirun_dbg.valgrind shell script that
parses the command line arguments correctly. This may require a little
monkeying around with the script, like stripping of quotes and such.

Hope this helps,
Robert


Seán wrote:
> 
> 
> Seán wrote:
>> 
>> I seem to have the same problem. 
>> 
> 
> I have solved my initial problem. It was caused by interference of another
> valgrind version already installed. I did a "complete remove" using
> synaptic, instead of the "remove" I had previously tried. I now have
> libmpiwrap.so installed in the directory
> /usr/local/lib/valgrind/x86-linux/libmpiwrap.so.
> 
> I am trying to run an MPI HelloWorld program with valgrind. I am not
> getting the expected output
> "valgrind MPI wrappers 31901: Active for pid 31901" . 
> Instead I get:
> 
> sean@seanscomputer:~/CODE$
> LD_PRELOAD=/usr/local/lib/valgrind/x86-linux/libmpiwrap.so mpirun -np 2
> /usr/local/bin/valgrind ./main
> ==2869== Memcheck, a memory error detector.
> ==2869== Copyright (C) 2002-2008, and GNU GPL'd, by Julian Seward et al.
> ==2869== Using LibVEX rev 1884, a library for dynamic binary translation.
> ==2869== Copyright (C) 2004-2008, and GNU GPL'd, by OpenWorks LLP.
> ==2869== Using valgrind-3.4.1, a dynamic binary instrumentation framework.
> ==2869== Copyright (C) 2000-2008, and GNU GPL'd, by Julian Seward et al.
> ==2869== For more details, rerun with: -v
> ==2869== 
> valgrind: seanscomputer: command not found
> p0_2869:  p4_error: Child process exited while making connection to remote
> process on localhost: 0
> ==2869== Conditional jump or move depends on uninitialised value(s)
> ......
> 
> Does anyone know what that "valgrind: hostname: command not found" error
> is?
> 
> 


-----
--
Robert Crockett
Postdoctoral Fellow
Applied Numerical Algorithms Group
Lawrence Berkeley National Laboratory
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