Linux 4.9's Efficient BPF-based ProfilerBPF-optimized profiling arrived in Linux 4.9-rc1 (patchset), allowing the kernel to profile via timed sampling and summarize stack traces. Here's how I explained it recently in a talk alongside other prior perf methods for CPU flame graph generation: Linux 4.9 skips needing the perf.data file entirely, and its associated overheads. I wrote about this as a missing BPF feature in March. It is now do
