Hi, I'm using petsc 3.3p4 I'm trying to run a nonlinear SNES solver on GPU with gmres and jacobi PC using VECSEQCUSP and MATSEQAIJCUSP datatypes for the rhs and jacobian matrix respectively. When running top I still see significant CPU utilization (800-900 %CPU) during the solve ? possibly from some multithreaded operations ?
Is this expected ? I was thinking that since I input everything into the solver as a CUSP datatype, all linear algebra operations would be on the GPU device from there and wasn't expecting to see such CPU utilization during the solve ? Do I probably have an error in my code somewhere ? Thanks, David -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20121117/80af73f9/attachment-0001.html>
