OpenCL SMM auto-tuning has moved out of DBCSR. The benchmark driver, tune_multiply.py workflow, tuned-parameter CSV files, and related OpenTuner setup are maintained with the SMM sample in LIBXSTREAM.
DBCSR consumes this functionality through its OpenCL backend when built with -DUSE_ACCEL=opencl and linked with LIBXS and LIBXSTREAM. Use the LIBXSTREAM documentation for current tuning commands and parameter-management details.