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#!/usr/bin/stap
/*
* func_time_stats.stp
* usage: func_time_stats.stp function_probe
*/
global start, intervals
probe $1 { start[tid()] = gettimeofday_us() }
probe $1.return
{
t = gettimeofday_us()
old_t = start[tid()]
if (old_t) intervals <<< t - old_t
delete start[tid()]
}
probe end
{
printf("intervals min:%dus avg:%dus max:%dus count:%d variance:%d\n",
@min(intervals), @avg(intervals), @max(intervals),
@count(intervals), @variance(intervals, 3))
print(@hist_log(intervals));
}