Is this something that Open MPI should be setting automatically? Tim
On Tuesday 10 July 2007 02:44:04 pm George Bosilca wrote: > I always use MX_RCACHE=2 for both MTL and BTL. So far I didn't had > any problems with it. > > george. > > On Jul 10, 2007, at 2:37 PM, Brian Barrett wrote: > > On Jul 10, 2007, at 11:40 AM, Scott Atchley wrote: > >> On Jul 10, 2007, at 1:14 PM, Christopher D. Maestas wrote: > >>> Has anyone seen the following message with Open MPI: > >>> --- > >>> warning:regcache incompatible with malloc > >>> --- > >>> > >>> <snip> > >>> > >>> --- > >>> > >>> We don't see this message with mpich-mx-1.2.7..4 > >> > >> MX has an internal registration cache that can be enabled with > >> MX_RCACHE=1 or disabled with MX_RCACHE=0 (the default before MX-1.2.1 > >> was off, and starting with 1.2.1 the default is on). If it is on, MX > >> checks to see if the application is trying to override malloc() and > >> other memory handling functions. If so, it prints the error that you > >> are seeing and fails to use the registration cache. > >> > >> Open MPI can use the regcache if you set MX_RCACHE=2. This tells MX > >> to skip the malloc() check and use the cache regardless. In the case > >> of Open MPI, this is believed to be safe. That will not be true for > >> all applications. > >> > >> MPICH-MX does not manage memory, so MX_RCACHE=1 is safe to use unless > >> the user's application manages memory. > > > > Scott - > > > > I'm having trouble getting the warning to go away with Open MPI. > > I've disabled our copy of ptmalloc2, so we're not providing a malloc > > anymore. I'm wondering if there's also something with the use of > > DSOs to load libmyriexpress? Is your belief that MX_RCACHE=2 is safe > > just for the BTL or for the MTL as well? > > > > Brian > > > > > > -- > > Brian W. Barrett > > Networking Team, CCS-1 > > Los Alamos National Laboratory > > > > > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
