Linux perf

Purpose

Guide agents through perf for CPU profiling: sampling, hardware counter measurement, hotspot identification, and integration with flamegraph generation.

Triggers

• "Which function is consuming the most CPU?"
• "How do I measure cache misses / IPC?"
• "How do I use perf to find hotspots?"
• "How do I generate a flamegraph from perf data?"
• "perf shows [unknown] or [kernel] frames"

Workflow

1. Prerequisites