4 ms·

Just use Instruments. Yes, I know it’s slow, but it’s miles ahead of anything on Linux. If you’re looking for an identical profiling experience on macOS as you

• ForLoveOfCats 1y ago
  XCode is painful but I always miss Instruments whenever I'm profiling something on my Linux systems
  • Cloudef 1y ago
    perf top
    • saagarjha 1y ago
      perf top is Instrument's "top functions" sampler. It doesn't get used all that often because there are much better ways to process this information.
• verte_zerg 1y ago
  What kind of extra functionality are you getting from Instruments that isn't covered by other tools?
  • dagmx 1y ago
    Other than just the niceness of the interface, a key one is that the M4 generation added profiling of CPU branching and afaik instruments is the only thing that supports it right now
    • verte_zerg 1y ago
      In the M4, Apple mostly added counters only for the SME engine. The full list of supported counters can be found in the official guide: https://developer.apple.com/documentation/apple-silicon/cpu-optimization-guide https://developer.apple.com/documentation/apple-silicon/cpu-... Regarding branch profiling, all arm64 (M1+) cpus support these counters: - BRANCH_CALL_INDIR_MISPRED_NONSPEC - BRANCH_COND_MISPRED_NONSPEC - BRANCH_INDIR_MISPRED_NONSPEC - BRANCH_MISPRED_NONSPEC - BRANCH_RET_INDIR_MISPRED_NONSPEC - INST_BRANCH - INST_BRANCH_CALL - INST_BRANCH_COND - INST_BRANCH_INDIR - INST_BRANCH_RET - INST_BRANCH_TAKEN afaik there is no limitation to implementing the fetching of all these counters based on ibireme’s research on kperf. btw, forked "poop" already can fetch BRANCH_MISPRED_NONSPEC.
  • saagarjha 1y ago
    An interface designed around finding real bottlenecks instead of "here is some data do you think it is good".