Meta fleet PTP precision on commodity servers with hardware timestamping (Meta measurement, 2022); SPTP (2024) was comparable with less appliance load
sub-microsecondobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| As of | 2022-11 |
| Source | Engineering at Meta, 'Precision Time Protocol at Meta' (2022-11-21); secondary: NVIDIA Technical Blog (2023-03-06) and Engineering at Meta, 'Simple Precision Time Protocol (SPTP)' (2024-02-07) · Total observer end-to-end error measured with a Calnex Sentinel is about 92 ns; 92 ns x 4.745 = 436 ns window of uncertainty at 99.9999% confidence. SPTP article: over 40 percent CPU, 70 percent memory and 50 percent network utilization improvements on a time appliance. |
| Review | checking…review by 2027-04-16 · standard cadence |
| Recorded changes | last 2026-10-16 · 2 revisions tracked |
| Claim id | fleet-ptp-precision-on-commodity-servers-via |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.