Quality-of-service-based fabric power management

Abstract

Techniques are disclosed relating to selective rate limiting and reducing clock frequency of fabric circuitry in response to certain power management events. Disclosed techniques may advantageously allow power management circuitry to reduce or avoid negative impacts of power events by reducing the clock frequency of a communication fabric while using rate limiting of relatively lower-priority traffic to reduce impacts of the frequency reduction on high-priority traffic. For example, rate limiting of lower-quality-of-service virtual channels may continue after recovery of the clock frequency until higher-quality-of-service virtual channels have recovered from the frequency reduction.