Install Perf
On newer kernels
If you are using container, making sure that you have kernel relative new, for example, 5.4. It is tested that installing on kernel 3.10 may not work.
apt-get install linux-tools-common linux-tools-generic linux-tools-`uname -r`
For older kernels
You can compile the perf binary directly from the linux kernel source code and it should be universally available on all Linux distros so long as the kernel version supports it.
git clone --depth=1 https://github.com/torvalds/linux.git cd linux/tools/perf apt-get install flex bison make cp perf /usr/bin/ perf -v # verify the installation
Flame Graph
1. Capture Stacks
The sleep 60 can be replaced by your own commands.
$ perf record -F 99 -a -g -- sleep 60 $ perf script > out.perf
2. Fold stacks
To fold the call stacks, we have to clone the brendangregg/FlameGraph in advance and use one of the tools in side it.
$ ./stackcollapse-perf.pl out.perf > out.folded
3. Render a svg with flamegraph.pl
$ ./flamegraph.pl out.folded > out.svg