PTP · Precision Time Protocol
IEEE-1588 time distribution using hardware timestamping in NIC and switch silicon; treat its offset bound under saturated load as a measured acceptance gate, not a configuration step.
Current numbers
sub-microsecondfleet PTP precision on commodity servers via hardware timestamping; SPTP published 2024
sub-µsfleet PTP offset-from-master target the time-sync gate must demonstrate, under load and across every node
~10 nsPTP accuracy held across an NVIDIA Spectrum switch (one-step, across speeds/FEC)