[Verse 1] Beneath the surface where the kernel dwells Hardware counters hold their secret tales Cycles burning through the silicon maze While cache lines scatter in performance haze Boot up perf and pierce the mystery veil CPU profiling leaves a blazing trail [Chorus] Perf record, perf report, perf stat reveals Cache misses dancing on the spinning wheels Branch prediction stumbles, pipeline stalls Perf annotate shows where performance falls Sample the kernel, trace each function call Hardware events tell the story of it all [Verse 2] Launch with sudo, kernel space awaits Event filters capture execution states L1 data misses plague your memory lane While TLB thrashing drives you near insane Instructions retired versus cycles spent Flamegraphs expose where time truly went [Chorus] Perf record, perf report, perf stat reveals Cache misses dancing on the spinning wheels Branch prediction stumbles, pipeline stalls Perf annotate shows where performance falls Sample the kernel, trace each function call Hardware events tell the story of it all [Bridge] PMU counters tick like clockwork gears Frequency scaling shifts throughout the years Thermal throttling chokes the silicon throat While context switches interrupt each note Dwarf symbols map the assembly maze Statistical sampling cuts through the haze [Verse 3] Top command shows the surface layer thin But perf probe digs where bottlenecks begin Tracepoints scattered through the kernel core Ring buffer captures what you're searching for From scheduler latency to IRQ storms Perf transforms raw data into readable forms [Chorus] Perf record, perf report, perf stat reveals Cache misses dancing on the spinning wheels Branch prediction stumbles, pipeline stalls Perf annotate shows where performance falls Sample the kernel, trace each function call Hardware events tell the story of it all [Outro] When systems crawl and users start to frown Perf lifts the hood and hunts performance down In kernel space where silicon meets code Let hardware counters guide you down the road
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