[petsc-users] valgrind

[Matthew Knepley]

On Tue, Aug 2, 2011 at 5:06 PM, Kuhlemann, Verena <vkuhlem at emory.edu> wrote:

>  Hi,
>
>  I am trying to find an error in my program with valgrind.
> The first message that I get is the following:
>

No, MPICH is doing something that valgrind does not understand with memory.
You can usually
ignore anything that goes back into MPI.

   Matt


>  Syscall param write(buf) points to uninitialised byte(s)
> ==22395== Syscall param write(buf) points to uninitialised byte(s)
> ==22393==    at 0x73D92C0: __write_nocancel (in /lib64/libc-2.5.so)
> ==22393==    by 0x7A76283: ibv_cmd_modify_qp (in
> /usr/lib64/libibverbs.so.1.0.0)
> ==22393==    by 0x88B742A: ??? (in /usr/lib64/libmlx4-rdmav2.so)
> ==22393==    by 0x7A7A363: ibv_modify_qp (in
> /usr/lib64/libibverbs.so.1.0.0)
> ==22393==    by 0x67A3DDF: MPID_VIA_Init (viainit.c:1014)
> ==22393==    by 0x67826BB: MPID_Init (mpid_init.c:66)
> ==22393==    by 0x677438E: MPIR_Init (initutil.c:279)
> ==22393==    by 0x432732: PetscInitialize (pinit.c:561)
> ==22395==    at 0x73D92C0: __write_nocancel (in /lib64/libc-2.5.so)
> ==22395==    by 0x7A76283: ibv_cmd_modify_qp (in
> /usr/lib64/libibverbs.so.1.0.0)
> ==22395==    by 0x88B742A: ??? (in /usr/lib64/libmlx4-rdmav2.so)
> ==22395==    by 0x7A7A363: ibv_modify_qp (in
> /usr/lib64/libibverbs.so.1.0.0)
> ==22395==    by 0x67A3DDF: MPID_VIA_Init (viainit.c:1014)
> ==22395==    by 0x67826BB: MPID_Init (mpid_init.c:66)
> ==22395==    by 0x677438E: MPIR_Init (initutil.c:279)
> ==22395==    by 0x432732: PetscInitialize (pinit.c:561)
> ==22395==    by 0x4046FC: main (runtests.c:48)
> ==22395==  Address 0x7feffef78 is on thread 1's stack
>
>  I am not sure what this is suppose to tell me. Is the something wrong
> with my PetscInitialize?
>
>  Thanks for the help,
>
>  Verena
>
>
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-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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