Tabuchi-san, thanks for the report.
this is indeed a bug i was able to reproduce on my linux laptop (for some unknown reasons, there is no crash on OS X ) ompi_datatype_pack_description_length malloc 88 bytes for the datatype description, but 96 bytes are required. this causes a memory corruption with undefined side effects (crash in MPI_Type_free, or in MPI_Win_unlock) iirc, we made some changes to ensure data is always aligned (Sparc processors require this), and we could have missed some stuff, and hence malloc less bytes than required. Cheers, Gilles On Sat, May 21, 2016 at 5:50 PM, Akihiro Tabuchi <tabu...@hpcs.cs.tsukuba.ac.jp> wrote: > Hi, > > At OpenMPI 1.10.2, MPI_Type_free crashes with a many nested derived type > after using MPI_Put/Get > with the datatype as target_datatype. > The test code is attached. > In the code, MPI_Type_free crashes if N_NEST >= 4. > > This problem occurs at OpenMPI 1.8.5 or later. > There is no problem at OpenMPI 1.8.4, MPICH 3.2, and MVAPICH 2.1. > > Does anyone know about the problem? > > Regards, > Akihiro > > -- > Akihiro Tabuchi > HPCS Lab, Univ. of Tsukuba > tabu...@hpcs.cs.tsukuba.ac.jp > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/05/29260.php
