[Verse 1] When your kernel's running slow and you need to know why CPU cycles disappearing, performance hitting sky high There's a tool that peers inside the hardware's core Perf will show you what your system's really working for Sample by sample, it captures every call Memory access patterns, branch predictions and all [Chorus] Perf record, perf report, dive into the data flow Cache miss counting, branch predicting, watch your metrics grow Hardware counters telling stories that you need to know Perf stat, perf top, let the profiling show Where your kernel's bottlenecks really want to go [Verse 2] Start with perf stat to get the overview clear Instructions per cycle, cache behavior crystal clear L1, L2, L3 misses lighting up the screen Branch mispredictions showing where performance gets lean TLB misses stalling memory translation Page faults revealing allocation frustration [Chorus] Perf record, perf report, dive into the data flow Cache miss counting, branch predicting, watch your metrics grow Hardware counters telling stories that you need to know Perf stat, perf top, let the profiling show Where your kernel's bottlenecks really want to go [Bridge] Flame graphs burning bright with call stack visualization Hot spots glowing red need optimization Kernel space and user space divided clean PMU events painting performance scene Sample frequency tuning signal over noise Profile guided optimization, make the smart choice [Verse 3] Perf record dash g captures call graph traces Function attribution shows you all the places Where your CPU time vanishes into thin air System calls and interrupts beyond compare Annotate the assembly, see instruction cost Find the cycles where performance gets lost [Chorus] Perf record, perf report, dive into the data flow Cache miss counting, branch predicting, watch your metrics grow Hardware counters telling stories that you need to know Perf stat, perf top, let the profiling show Where your kernel's bottlenecks really want to go [Outro] From sampling to tracing, perf shows the way Hardware performance counters guide you every day Kernel space profiling with precision and might Perf tools illuminate performance insight
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