Re: [OMPI users] glut display 'occasionally' opens

Hi, Am 08.12.2010 um 21:20 schrieb Ralph Castain: > Afraid I'm not an x-forwarding expert... :-( > > Hopefully someone more knowledgeable can chime in. > > > On Dec 8, 2010, at 12:54 PM, brad baker wrote: > >> Ya, I just tested -x as well, and it does indeed set the value of DISPLAY >> corre

Re: [OMPI users] glut display 'occasionally' opens

Afraid I'm not an x-forwarding expert... :-( Hopefully someone more knowledgeable can chime in. On Dec 8, 2010, at 12:54 PM, brad baker wrote: > Ya, I just tested -x as well, and it does indeed set the value of DISPLAY > correctly for every process, every time I run it. Unfortunately the disp

Re: [OMPI users] glut display 'occasionally' opens

Ya, I just tested -x as well, and it does indeed set the value of DISPLAY correctly for every process, every time I run it. Unfortunately the display is still not behaving as desired. Sometimes they open, and sometimes they don't. I'm currently using openmpi-1.4.1 over infiniband on a Rocks clust

Re: [OMPI users] glut display 'occasionally' opens

FWIW: I just tested the -x option on a multi-node system and had no problem getting the value of DISPLAY to propagate. I was able to define it on the cmd line, saw it set correctly on every process, etc. This was with our devel trunk - not sure what version you are using. On Dec 7, 2010, at 12

Re: [OMPI users] glut display 'occasionally' opens

Thanks for your responses! I'm at home today so I can't actually do any tests to 'see' if anything works. But I logged in remotely and I did as Ralph suggested and ran env as my app. No process returned a value for DISPLAY. Then I made a small program that calls getenv("DISPLAY") to run with mpi

Re: [OMPI users] glut display 'occasionally' opens

Are you using ssh to launch OMPI between your nodes? (i.e., is mpirun using ssh under the covers to launch on remote nodes) If so, you might want to just set OMPI to use "ssh -X", which sets up SSH tunneled X forwarding, and therefore it sets DISPLAY for you properly on all the remote nodes au

Re: [OMPI users] glut display 'occasionally' opens

BTW: you might check to see if the DISPLAY envar is being correctly set on all procs. Two ways to do it: 1. launch "env" as your app to print out the envars - can be messy on the output end, though you could use the mpirun options to tag and/or split the output from the procs 2. in your app, j

Re: [OMPI users] glut display 'occasionally' opens

Hmmm...yes, the code does seem to handle that '=' being in there. Forgot it was there. Depending on the version you are using, mpirun could just open the display for you. There is an mpirun option that tells us to please start each app in its own xterm. You shouldn't need forwarding if you are

Re: [OMPI users] glut display 'occasionally' opens

Without including the -x DISPLAY, glut doesn't know what display to open. For instance, without the -x DISPLAY parameter glut returns an error from each process stating that it could not find display "" (empty string). This strategy is briefly described in the openmpi FAQs

Re: [OMPI users] glut display 'occasionally' opens

Guess I'm not entirely sure I understand how this is supposed to work. All the -x does is tell us to pickup an envar of the given name and forward its value to the remote apps. You can't set the envar's value on the cmd line. So you told mpirun to pickup the value of an envar called "DISPLAY=:0.

[OMPI users] glut display 'occasionally' opens

Hello, I'm working on an mpi application that opens a glut display on each node of a small cluster for opengl rendering (each node has its own display). My current implementation scales great with mpich2, but I'd like to use openmpi infiniband, which is giving me trouble. I've had some success wi