ocl: updated tuned parameters, improved tuner, adjusted kernel #1417

Job	Run time
pre-commit	1m 11s
build-on-opencl (OPENMP=ON, SMM=libxsmm)	14m 35s
build-on-cuda (OPENMP=ON)	8m 12s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, openmpi)	2m 19s
build-on-rocm (OPENMP=ON)	8m 43s
build-and-test (MPI=ON, OPENMP=ON, SMM=blas, mpich)	3m 59s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, openmpi)	2m 19s
build-and-test (MPI=ON, OPENMP=ON, SMM=libxsmm, mpich)	2m 16s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, openmpi)	2m 22s
build-and-test (MPI=ON, OPENMP=OFF, SMM=blas, mpich)	2m 20s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, openmpi)	2m 21s
build-and-test (MPI=ON, OPENMP=OFF, SMM=libxsmm, mpich)	2m 20s
build-and-test (MPI=OFF, OPENMP=ON, SMM=blas, openmpi)	2m 22s
build-and-test (MPI=OFF, OPENMP=ON, SMM=libxsmm, openmpi)	2m 19s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=blas, openmpi)	2m 22s
build-and-test (MPI=OFF, OPENMP=OFF, SMM=libxsmm, openmpi)	2m 22s
Combine & check coverage.	0s
	1h 2m 22s

Provide feedback