Collect system number of syscalls using STAP

syscalls_counter.stp

// Use MAXMAPENTRIES to set the maximum size of the array
// for example sudo stap  -D MAXMAPENTRIES=40000 ./src/driver/load_measurement.stp
global probe_frequency%
global processes%

probe begin
{
	printf("Ctrl-C to print the results\n");
}

probe kprocess.exec
{
	processes[pid()] = filename
}

probe syscall.read
{
	probe_frequency[pid(), name] <<< 1
}

probe end
{
	foreach ([pid, name] in probe_frequency)
		printf("process=%s, pid=%u, probe=%s, count=%u\n", 
		processes[pid], pid, name, 
		@count(probe_frequency[pid, name]))
}