Intel folks: can you comment on this? It appears that the libinfinipath signal handler is interfering with the java garbage collector.
> On Aug 25, 2015, at 8:01 AM, Gilles Gouaillardet > <gilles.gouaillar...@gmail.com> wrote: > > 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> 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 > > 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 > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > devel mailing list > de...@open-mpi.org > 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 > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/08/17841.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
