[CIG-SHORT] Fixing the Coarse level….

[Romain Jolivet]

Hello, 

While running my code in parallel, on a 24 core machine (not a cluster), with more than 16 threads, I get the following messages in between each iteration of the Non linear solver.

 -- Integrating residual term in operator.
 >> /home/jolivetr/MYBIN/pylith/pylith-1.7.1-linux-x86_64/lib/python2.7/site-packages/pylith/problems/Implicit.py:215:step
 -- implicit(info)
 -- Solving equations.
  0 SNES Function norm 1.784837919545e-03 
[II] fixing the coarse-level matrix dead dofs
  1 SNES Function norm 1.239041380174e-04 
[II] fixing the coarse-level matrix dead dofs
  2 SNES Function norm 1.763935552911e-05 
[II] fixing the coarse-level matrix dead dofs
  3 SNES Function norm 2.599718269752e-06 
[II] fixing the coarse-level matrix dead dofs
  4 SNES Function norm 1.164158628292e-05 
[II] fixing the coarse-level matrix dead dofs
  5 SNES Function norm 2.377784148584e-08 
[II] fixing the coarse-level matrix dead dofs

What does "fixing the coarse-level matrix dead dofs" means? 
It does not show up when I run this problem with less threads. Does it have to do something with splitting the problem over too much threads that my problem really needs?

Thanks,
Romain

Romain Jolivet
Postdoctoral Scholar
Geological and Planetary Sciences
California Institute of Technology, Pasadena, CA 
rjolivet at caltech.edu
+1 (626) 560 6356