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by themulticaster 1201 days ago
I'm not familiar with how it compares to ARM/Intel's profiling tools, but I found the Linux perf suite to be very capable (though limited to Linux obviously). And Hotspot [1] allows effortless profile visualization using flame graphs, including some very interesting features such as off-CPU time profiling [2]. "perf record" coupled with Hotspot forms a very smooth edit-compile-profile cycle.

[1] https://github.com/KDAB/hotspot

[2] https://github.com/KDAB/hotspot#off-cpu-profiling
1 comments
rerdavies 1201 days ago
Agreed. Linux perf tools are perfectly acceptable for all but the most ultra-extreme optimization tasks.

VTune allows you to determine where pipeline stalls are occurring at the instruction level (for that last 2 or 3% gain in performance). I haven't worked with ARM profilers (way out of my price range), but I assume, given the exorbitant price, they provide the same sort of in-depth analysis. Probably a handful of people on the planet that need that kind of in-depth analysis.

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