on x86_64 implemented with rdtscp or rdpid, generically with a syscall. Change-Id: I8f776848bf35575abec8a8c612c4a25d8550daea Reviewed-on: https://review.haiku-os.org/c/haiku/+/6866 Reviewed-by: waddlesplash <[email protected]> Tested-by: Commit checker robot <[email protected]>