As PCIe moves toward 128 GT/s and beyond, multistream architecture transitions from an optimization to a requirement.
Scaling raw lane speed without rethinking controller microarchitecture leads to diminishing returns. It introduces multistream architecture, a controller‑level re‑architecture designed to sustain effective bandwidth under mixed and small‑packet workloads. This paper examines the architectural inflection point at PCIe 6.0, details transmit‑ and receive‑side changes required for multistream operation, and explains how the approach scales cleanly to PCIe 7.0 and future generations. Quantitative analysis highlights utilization gains across payload sizes, showing how multistream closes the efficiency gap for AI‑class systems.
What You’ll Learn:
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