Hello,

I have CUDA aware MPI, and I have upgraded from PETSc 3.12 to PETSc 3.15.4 and petsc4py 3.15.4.

Now, when I call

PETSc.KSP().solve(..., ...)

The information of GPU is always printed to stdout by every MPI rank, like

CUDA version: v 11040
CUDA Devices:

0 : Quadro P4000 6 1
Global memory: 8105 mb
Shared memory: 48 kb
Constant memory: 64 kb
Block registers: 65536

CUDA version: v 11040
CUDA Devices:

0 : Quadro P4000 6 1
Global memory: 8105 mb
Shared memory: 48 kb
Constant memory: 64 kb
Block registers: 6553

...

I wonder if there is an option to turn that off?

I have tried including

-cuda_device NONE

in command options, but that did not work.

Best regards,

Yiyang