PTP, TSC, and the lies your p99 tells you
Clock synchronization for trading: TSC drift, PTP/IEEE 1588 with Solarflare, MiFID II RTS-25 compliance, and coordinated omission - the measurement artifact that hides your real tail latency.
You cannot optimize what you cannot measure correctly. Coordinated omission routinely makes systems look 40x faster than they are. MiFID II mandates ±1µs clock accuracy. These five posts build the measurement discipline needed before any latency optimization work.
A practitioner's guide to clock sources in trading systems: TSC drift, CLOCK_MONOTONIC overhead, HPET calibration, and why TAI beats CLOCK_REALTIME for audit logs.
How I implemented PTP hardware timestamping on Solarflare SFN8522 at Gemini to achieve ±30ns clock sync and sub-100µs MiFID II RTS-25 compliance.
MiFID II RTS-25 timestamp requirements explained for practitioners, with the full implementation pipeline I built at Upside and what it means for UAE/DIFC crypto firms.
Gil Tene's coordinated omission problem explained with real numbers: how a naive benchmark showed 50µs P99 when the actual P99 was 2ms, and how to fix it with HDRHistogram.
Sub-100µs P99.9 for 24/7 trading: CPU isolation, GC elimination, request hedging, thermal throttling. Each technique and its measured latency impact, including Nitro Enclave signing numbers.