Thank you !
The patch fixes indeed my problem.
You saved me a lot of time.
Emmanuel
From: devel [mailto:devel-boun...@lists.open-mpi.org] On Behalf Of Gilles
Gouaillardet
Sent: Wednesday, March 29, 2017 7:24 AM
To: Open MPI Developers
Subject: Re: [OMPI devel] Segfault during a free in
Folks,
mpirun -np 3 --oversubscribe --mca coll basic,libnbc,self --mca pml ob1
--mca btl tcp,self valgrind ./osu_reduce_scatter -m 65536:65536 -i 1 -x 0
issues some warnings such as
==5698== Invalid write of size 2
==5698==at 0x4C2C0D3: memcpy@@GLIBC_2.14 (vg_replace_strmem.c:1018)
==56
Emmanuel,
I tried with both 2.x and master (they are only syntactically different
with regard to reduce_scatter) and I can't reproduce your issue. I run the
OSU test with the following command line:
mpirun -n 97 --mca coll basic,libnbc,self --mca pml ob1
./osu_reduce_scatter -m 524288: -i 1 -x 0
Hello Emmanuel,
Which version of Open MPI are you using?
Howard
2017-03-28 3:38 GMT-06:00 BRELLE, EMMANUEL :
> Hi,
>
> We are working on a portals4 components and we have found a bug (causing
> a segmentation fault ) which must be related to the coll/basic component.
> Due to a lack of time
