Subject: [OMPI users] Cannot create X11 window in Rank 0 node(master) ?
From: Ashika Umanga Umagiliya (aumanga_at_[hidden])
Date: 2009-06-30 05:53:01
Hi all,
I have written mandelbrot rendering using X11.I have two nodes with OpenMPI.
In my code, the rank 0 node(master) does the data collection from
salves, Window creation using X11 and render the graph.(using
XCreateSimpleWindow() ). Slave nodes calculate and send data to master.
But when I execute my application by :
#mpirun -np 4 -host biggserver ./mandel
its gives error :
"cannot connect to X server '(null)'"
Isn't the rank 0 given to the machine which we initially run the MPI
application?
If so,why the application says it cannot connect to X server?Since rank
0 is my workstation?
When I run this using a single node , it works well.
Any tips?
thanks in advance,
umanga