How to get complete stack dump from profiler in every sample for use in flame graph?
arm, linux, profiling, stack-trace, valgrind
Solution
Try Linux perf_events (aka the "perf" command), which is part of the mainline Linux kernel, and usually installed via the linux-tools-common (or similar) package. I often use it to create flame graphs on Linux.
I wrote up some instructions for creating flame graphs with perf on: http://www.brendangregg.com/perf.html#FlameGraphs
Problem
I really like the idea of the Flame Graph for profiling since it will help in eliminating unneeded function calls. There is a catch however in that it requires the profiler to do a complete stack dump each time it collects a sample. This can be accomplished with DTrace or SystemTap quite easily, but I need to be able to do this on an ARM device running ubuntu (which eliminates DTrace). I would also like to do this without recompiling the kernel (which eliminates SystemTap). Is it possible to get Valgrind/Callgrind or OProfile (or some other profiling tool that can run on an ARM device in Ubuntu) to output something similar to: `dtrace -n 'profile-1001 /pid == 12345 && arg1/ { @[ustack()] = count(); }`