perf – linux performance

Recently I came along Brendan D. Gregg’s Homepage who is doing really awesome stuff to find performance bottlenecks. As it does not make sense to repeat everything here from perf_events, probes to flamegraphs. I really recommend to take a look at his work.

Some Notes to myself:

For stack traces compile with -fno-omit-frame-pointer for optimized builds
debug builds with -g dwarf do not require it.

  • perf record -g
  • perf report -g "graph,0.5,caller"

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