i do not know if this can be runtime detected ... note we should report this to intel folks and ask them to advise. ideally, they would provide a way to make sure libinfinipath.so does not conflict with the jvm signal handlers.
my idea is to dlopen libinfinipath only if java bindings are not used. On Tuesday, August 25, 2015, Jeff Squyres (jsquyres) <jsquy...@cisco.com> wrote: > Is it possible to run-time detect this situation? E.g., probe the signal > handler, or somesuch. > > Rationale: I'd rather have something run-time disabled than not built. > > Would dlopen'ing libinfinipath change actually change its signal handler > behavior? > > > > On Aug 25, 2015, at 4:27 AM, Gilles Gouaillardet <gil...@rist.or.jp > <javascript:;>> wrote: > > > > Folks, > > > > some time ago, some crashes were reported when using java bindings. > > one of them was caused was caused by mca_mtl_psm.so. > > the root cause is libinfinipath.so initializer sets its own signal > handler, which > > conflicts with the signal handler sets by the jvm. > > the only workaround is to disable the psm mtl > > (e.g. mpirun --mca mtl ^psm ...) > > since mpirun --mca mtl_psm_priority 0 ... does not work > > (libinfinipath.so is loaded, so the initializer is ran and the signal > handlers are set) > > so the psm mtl cannot be disabled by the Java MPI_Init() > > > > one option is to document this > > an other option is not to build the psm mtl if java bindings are built > > and an other option is to revamp mca_mtl_psm.so so it does not link with > libinfinipath.so > > (use an intermediate component, or dlopen libinfinipath) > > > > any thoughts ? > > > > Cheers, > > > > Gilles > > _______________________________________________ > > devel mailing list > > de...@open-mpi.org <javascript:;> > > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/08/17838.php > > > -- > Jeff Squyres > jsquy...@cisco.com <javascript:;> > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > devel mailing list > de...@open-mpi.org <javascript:;> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/08/17840.php >
