Re: [OMPI devel] v1.3: libnbc and sm2 coll components

2008-07-21 Thread Torsten Hoefler
Hi Jeff, > Should these 2 components be in v1.3? for LibNBC: no. This was a test to implement blocking colls on top of non-blocking when the tuned implementation was lacking some ops (e.g., Allgather). Tuned now efficiently implements most collectives which makes the blocking version of LibNBC

Re: [OMPI devel] RFC: make mpi_leave_pinned=1 the default

2008-07-03 Thread Torsten Hoefler
On Thu, Jul 03, 2008 at 05:56:52AM -0700, Jeff Squyres wrote: > - I know that leave_pinned is frequently meaningless to real apps > (although Torsten likes to argue otherwise -- and he's got at least > some real-world data points that show otherwise :-) ). I don't want to argue otherwise based

Re: [OMPI devel] [RFC] Non-blocking collectives (LibNBC) merge to trunk

2008-02-07 Thread Torsten Hoefler
Hi Ralph, > I don't have an opinion either way on this specific proposal. However, I do > have a growing concern over the number of packages being added to the > system, all of which want to "build by default". The build time is already > long and rapidly growing, and our code distribution is

Re: [OMPI devel] [RFC] Non-blocking collectives (LibNBC) merge to trunk

2008-02-07 Thread Torsten Hoefler
Hi Brian, > Let me start by reminding everyone that I have no vote, so this should > probably be sent to /dev/null. thanks for your comment and this will not go to /dev/null! > I think Ralph raised some good points. I'd like to raise another. yes [will reply to this in a separate thread] >

Re: [OMPI devel] Environment forwarding

2007-11-05 Thread Torsten Hoefler
On Mon, Nov 05, 2007 at 04:57:19PM -0500, Brian W. Barrett wrote: > This is extremely tricky to do. How do you know which environment > variables to forward (foo in this case) and which not to (hostname). > SLURM has a better chance, since it's linux only and generally only run on > tightly

Re: [OMPI devel] Problem with openib on demand connection bring up.

2007-06-13 Thread Torsten Hoefler
Hi Galen,Gleb, there is also something weird going on if I call the basic alltoall during the module_init() of a collective module (I need to wire up my own QPs in my coll component). It takes 7 seconds for 4 nodes and more than 30 minutes for 120 nodes. It seems to be an OpenIB wireup issue

Re: [OMPI devel] socket usage

2006-10-26 Thread Torsten Hoefler
Hi Joachim, > >> Is there a formula to calculate the number of socket connections per > >> node (S) that an OpenMPI application needs for running (via sockets) on > >> N nodes with P processes each? I guess something like > >> > >> S = P * (N-1)*P > > I would say that S=(N-1)*P (why do you

Re: [OMPI devel] socket usage

2006-10-26 Thread Torsten Hoefler
Hi Joachim, > Is there a formula to calculate the number of socket connections per > node (S) that an OpenMPI application needs for running (via sockets) on > N nodes with P processes each? I guess something like > > S = P * (N-1)*P I would say that S=(N-1)*P (why do you assume that S=O(P^2)?)

Re: [O-MPI devel] collectives discussion @LANL

2005-07-18 Thread Torsten Hoefler
Hi, > Wednesday, 27 Jul, 8-11am MT (I think that's 4-7pm DE time, right?) yes, it's ok for me - I'll ask the vcc and reply to this mail if they have any problems. Bye, Torsten -- "Elchwurst enthält kein Rindfleisch" Schild bei IKEA