With many techniques to debug SYCL applications that are similar to the way this would be done in any C++ code, there are some things to keep in mind. Codeplay Developer Relations Engineer Georgi Mirazchiyski has posted an outline on how you might go about debugging on your target device. To find out about how to profile your SYCL application, check out the Optimizing Your SYCL Code Using Profiling guide also from Codeplay.