4 ms·

Anyone know if this is better in Alpine Linux with musl libc and smaller stacks?

• dozzie 9y ago
  It's not really up to a distribution to lessen this cost. Large part of it is what task descriptor in the kernel takes. Also, if nothing else, you'll run out of PID numbers, as they're usually still 16 bits, even today, though there was a kernel compilation option to change that, from what I remember.
  • bluetech 9y ago
    It can be changed at runtime. From proc(5), system wide limits: /proc/sys/kernel/pid_max > PID_MAX_LIMIT, approximately 4 million /proc/sys/kernel/threads-max > FUTEX_TID_MASK (0x3fffffff), [approximately 1 billion] For per-process limit, increase RLIMIT_NPROC.
  • pcwalton 9y ago
    > Large part of it is what task descriptor in the kernel takes. 4K for kernel stacks, only 2K with future work. That's really not much space at all if you're doing anything interesting with those threads. > Also, if nothing else, you'll run out of PID numbers, as they're usually still 16 bits, even today Not for a very long time.