densemat traits: initialize compute_at field (may explain some erratic behavior with CUDA see https://bitbucket.org/essex/phist/issues/202/randomly-failing-arnoldi-tests-with-ghost
densemat traits: initialize compute_at field (may explain some erratic behavior with CUDA
see https://bitbucket.org/essex/phist/issues/202/randomly-failing-arnoldi-tests-with-ghost

RRZE-HPC/GHOST,RRZE-HPC/GHOST,RRZE-HPC/GHOST,RRZE-HPC/GHOST