I am learning ftrace, I read from the following link that I can enable function profiling using the 'function_profile_enabled' file.
mount -t tracefs nodev /sys/kernel/tracing
cd /sys/kernel/tracing
echo 1 > function_profile_enabled
echo "function" > current_tracer
https://www.kernel.org/doc/html/v4.18/trace/ftrace.html
The above link tells that the information is present in trace_stats/function (function0, function1..)
$ ls trace_stat/function*
trace_stat/function0 trace_stat/function15 trace_stat/function21 trace_stat/function28 trace_stat/function6
trace_stat/function1 trace_stat/function16 trace_stat/function22 trace_stat/function29 trace_stat/function7
trace_stat/function10 trace_stat/function17 trace_stat/function23 trace_stat/function3 trace_stat/function8
trace_stat/function11 trace_stat/function18 trace_stat/function24 trace_stat/function30 trace_stat/function9
trace_stat/function12 trace_stat/function19 trace_stat/function25 trace_stat/function31
trace_stat/function13 trace_stat/function2 trace_stat/function26 trace_stat/function4
trace_stat/function14 trace_stat/function20 trace_stat/function27 trace_stat/function5
root tracing
I only have 4 cores on my Ubuntu VM
$ grep -c ^processor /proc/cpuinfo
4
Can anyone explain me the actual significance of this file function<> in trace_stat folder functions folder in trace_stat folder
