From Kernel Scheduler to Python Source Line: Tracing a GPU Stall End to End

📰 Dev.to · Ingero Team

Learn to identify and debug GPU stalls in deep learning training steps, even when utilization is high

advanced Published 29 May 2026
Action Steps
  1. Run a GPU tracing tool to monitor kernel scheduler activity
  2. Configure the tracing tool to capture GPU stalls and their causes
  3. Analyze the tracing output to identify the source of the stall
  4. Apply optimizations to the code or system configuration to alleviate the stall
  5. Test the optimized system to verify improved performance
Who Needs to Know This

Machine learning engineers and data scientists can benefit from this knowledge to optimize their training workflows and improve overall system performance. It can help them identify bottlenecks in their GPU utilization, leading to faster training times and better resource allocation.

Key Insight

💡 High GPU utilization doesn't always mean optimal performance; tracing tools can help identify stalls and bottlenecks

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🚀 Debug GPU stalls in deep learning training, even with high utilization! 🤖

Key Takeaways

Learn to identify and debug GPU stalls in deep learning training steps, even when utilization is high

Full Article

TL;DR A GPU that reports 97% utilization can still be the slowest part of a training step,...
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