linux-perf-profile

To identify CPU performance bottlenecks on ARM Graviton3, Linux perf profiling analyzes PMU counters, topdown decomposition, and cache behavior. It pinpoints microarchitectural issues by examining instruction retirement bottlenecks and annotated disassembly.

High cache miss rates and branch mispredictions are diagnosed by examining PMU counters and TLB metrics during Linux perf profiling. This deep hardware-level analysis reveals why specific functions execute slower than expected under standard benchmarks.

Yes, you can use Linux perf to perform topdown analysis on ARM Graviton3 systems. This process utilizes PMU counters to break down CPU execution stalls, helping pinpoint exactly where instruction retirement bottlenecks occur within your code.

To profile a performance regression and compare builds, Linux perf supports A/B comparisons of build regressions. It generates flamegraphs and annotated disassembly to visualize and drill down into performance-critical code sections.

Linux perf profiling works for analyzing annotated disassembly on Graviton3 by mapping hardware metrics directly to source lines. This per-line cost analysis reveals exact cache miss rates and branch mispredictions within performance-critical code sections.