[petsc-dev] valgrind errors in the SUPERLU*

[Jeff Hammond]

Sherry, Satish:

Building MPI from source on Cray machines is not trivial, because Cray MPI
is proprietary.

However building MPICH on Cray is actually possible now as of a month or
two ago thanks to libfabric, but there are approximately two people on
earth who have done it successfully.

If it is critical for debugging to have this at NERSC, I'll share the Cori
MPI build details once I've got everything in order.

Jeff

On Saturday, January 16, 2016, Satish Balay <balay at mcs.anl.gov> wrote:

> On Sat, 16 Jan 2016, Xiaoye S. Li wrote:
>
> > By the way, I have a question about valgrind.   Lately I have been
> chasing
> > a possible memory corruption on  Cori at NERSC.  Valgrind gave LOTS OF
> > internal system-related warnings, such as:
> >
> > ==39059== Conditional jump or move depends on uninitialised value(s)
> > ==39059==    at 0xD5E336: __register_atfork (register-atfork.c:119)
> > ==39059==    by 0xD5E418: __libc_pthread_init (libc_pthread_init.c:48)
> > ==39059==    by 0x6629E1: __pthread_initialize_minimal (nptl-init.c:462)
> > ==39059==    by 0xD14BDA: (below main) (libc-start.c:152)
> > ==39059==
> > ==39057==    by 0xD5E418: __libc_pthread_init (libc_pthread_init.c:48)
> > ==39057==    by 0x6629E1: __pthread_initialize_minimal (nptl-init.c:462)
> > ==39057==    by 0xD14BDA: (below main) (libc-start.c:152)
> >
> > ​This has nothing do do with my program.  Do you know a way to NOT to
> print
> > those?   I got a huge file filled with these, hard to find out the real
> > error.
>
> You can ask valgrind to create a supression file.
>
> [then edit this file - and format it to include only the stuff that you
> want to supress]
>
> And then - use this file for your next run - to catch the actual issues.
>
> https://wiki.wxwidgets.org/Valgrind_Suppression_File_Howto has some of
> this info..
>
>
> We normally recommend using valgrind on linux with mpich built with
> '--enable-g=meminit' [--download-mpich option with petsc configure
> defaults to this mode] - so that its valgrind clean - and not bother
> with supression files.
>
> Satish



-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20160116/e5872be1/attachment.html>