SerDes & High-Speed I/O · All levels
SerDes Metrics Reference
Core metrics for latency quality, command efficiency, margin health, and field reliability.
Core metric families
QoS: p50/p95/p99 latency, jitter, and class fairness.
Efficiency: eye margin rate, ACT/PRE per request, bus turnaround overhead.
Capacity pressure: queue age distribution and blocked-cycle share.
Margin: eye width/height, Vref drift, retrain frequency, byte-lane outliers.
Reliability: CE/UE trends, scrub impact, rowhammer alert rates.
diagram
BEFORE / AFTER - SerDes Closure
BER ████████ ██
margin ███ ██████
retrain █████ █
metric: latency / bandwidth / reliability stability