We are seeing some large times spent in VecAssemblyBegin: VecAssemblyBegin 242 1.0 7.9796e+01 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 7.3e+02 12 0 0 0 5 76 0 0 0 10 0 VecAssemblyEnd 242 1.0 5.6624e-04 2.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0
This is with 64K cores on Edison. On 128K cores (weak speedup) we see: VecAssemblyBegin 248 1.0 2.3615e+02 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 7.4e+02 17 0 0 0 4 87 0 0 0 10 0 VecAssemblyEnd 248 1.0 6.8855e-04 2.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0 We are working on using older versions of PETSc to make sure this is a PETSc issue but does anyone have any thoughts on this? Mark
