Tutorial

  • 2021.1
  • 12/04/2020
  • Public Content

Tutorial: Debugging with Intel® Distribution for GDB* on
Linux*
OS Host

This tutorial describes basic scenarios of debugging Data Parallel C++ (DPC++) and OpenCL™ applications on a CPU
, GPU, and an FPGA emulator
using Intel® Distribution for GDB*.

Prerequisites

Check the and complete all setup steps depending on whether you aim at debugging on a CPU or a GPU.

Debugging a Kernel on CPU and GPU: Major Differences

In comparison to debugging on a CPU, debugging a kernel on a GPU has a few 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.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.