Counting number of processes in MINIX 3

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C

Hello

I am trying to count the number of processes running in MINIX3. I was using the below piece of code to do this, but realized this returns the value 64 everytime. I doubt this correct, so I would like to know if there is any other way?

struct kinfo kinfo;
int nr_tasks, nr_procs;
getsysinfo(PM_PROC_NR, SI_KINFO, &kinfo);
nr_procs = kinfo.nr_procs;
printf("Number of processes: %d", nr_procs);

Thanks.