Why it matters

Trace analysis skill separates good from great perf engineers. Systematic reading finds wins.

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The architecture

Look for: gaps (CPU stall), long kernels (compute), memory stalls, comms overlap.

Prioritize widest bar.

LLM trace analysisLook forgaps, long kernelsAttributeCPU vs GPU causeFixwidest bar firstSystematic reading beats intuition; train the team on trace patterns
LLM trace analysis.
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How it works end to end

Read timeline top to bottom.

Identify widest gap.

Attribute and fix.