Tutorial: Debugging with Intel® Distribution for GDB* on
Linux* OS Host
Debugging a Kernel on CPU and GPU: Major Differences
- All threads are vectorized and process several data elements simultaneously, if possible.
- An execution channel (SIMD lane) is referred to as a logical unit of execution for accessing data elements within an instruction. When kernels are compiled in debug mode, most SIMD instructions have 8 execution channels. This is referred as the SIMD width.
- Inferior calls (calling kernel functions from inside the debugger as part of expression evaluation) are not supported.