[MPICH] Bug in rings test of the MPI Intel Test suite ?

[Sylvain Jeaugey]

I search for the latest version on this page:
http://www-unix.mcs.anl.gov/mpi/mpi-test/tsuite.html
and it seemed to me that this was the latest release :
ftp://ftp.mcs.anl.gov/pub/mpi/mpi-test/intel-anl-2003.tar.gz

It was not fixed in this version, so I posted the bug. I don't see 
references for a 64 bit fix in the page. Is there a way to have access to 
the latest fixes ?

Thanks in advance,
Sylvain

On Fri, 5 Oct 2007, William Gropp wrote:

> Thanks for the note.  This is fixed in our most current version; do you have 
> the latest version of the Intel suite (there have been many minor but 
> important fixes like this, particular for bugs that show up on 64 bit 
> platforms)?
>
> Bill
>
> On Oct 4, 2007, at 10:46 AM, Sylvain Jeaugey wrote:
>
>> Hi all,
>> 
>> I think I just found a bug in the "rings" test of the Intel Test Suite. I 
>> didn't find a dedicated mailing list, so I'm posting here.
>> 
>> At line 231 of node.c, we call :
>>   ierr = MPI_Bcast(&seed, 1, MPI_LONG, 0, MPI_COMM_WORLD);
>> 
>> However, seed is an "int". On itanium, sizeof(long) is 8 whereas 
>> sizeof(int) is 4. This causes the Bcast of seed as well as .... the lower 4 
>> bytes of the rings pointer. In my case, process 0 and process 1 don't have 
>> the same pointer for rings, hence causing quickly a segmentation fault.
>> 
>> I changed the type to MPI_INTEGER :
>>   ierr = MPI_Bcast(&seed, 1, MPI_INTEGER, 0, MPI_COMM_WORLD);
>> and everything works fine.
>> 
>> Sylvain
>> 
>> 
>> 
>