Debugging CUDA Applications

Learn techniques and tools for debugging CUDA applications.

Common Debug Techniques

  • Error checking with cudaGetLastError()
  • Printf debugging in kernels
  • Using CUDA-GDB for step-by-step debugging
  • Memory checking with cuda-memcheck
  • Nsight debugging tools

Debugging Example

Here's an example showing various debugging techniques:

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Common Issues and Solutions

Memory Access Violations

Always check array bounds and ensure proper memory allocation.

Race Conditions

Use proper synchronization and atomic operations.

Kernel Launch Failures

Verify launch parameters and resource usage.

Incorrect Results

Add verification steps and debug prints.