For the record, and to try to explain why all MTT tests may have missed
this "bug", configuring without --enable-debug makes the bug disappear.
Still trying to figure out why.
Sylvain
On Thu, 3 Dec 2009, Sylvain Jeaugey wrote:
Hi list,
I hope this time I won't be the only one to suffer this bug :)
It is very simple indeed, just perform an allreduce with MPI_REAL8 (fortran)
and you should get a crash in ompi/op/op.h:411. Tested with trunk and v1.5,
working fine on v1.3.
From what I understand, in the trunk, MPI_REAL8 has now a fixed id (in
ompi/datatype/ompi_datatype_internal.h), but operations do not have an index
going as far as 54 (0x36), leading to a crash when looking for
op->o_func.intrinsic.fns[ompi_op_ddt_map[ddt->id]] in ompi_op_is_valid() (or,
if I disable mpi_param_check, in ompi_op_reduce()).
Here is a reproducer, just in case :
program main
use mpi
integer ierr
real(8) myreal, realsum
call MPI_INIT(ierr)
call MPI_ALLREDUCE(myreal, realsum, 1, MPI_REAL8, MPI_SUM, MPI_COMM_WORLD,
ierr)
call MPI_FINALIZE(ierr)
stop
end
Has anyone an idea on how to fix this ? Or am I doing something wrong ?
Thanks for any help,
Sylvain
