Symphony detects step misalignments in ring collectives via lightweight in-network tracking and mitigates them by throttling outpacing flows with congestion signals, yielding up to 54% better communication times in Astra-Sim simulations and a Tofino2 prototype.
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AQM schemes produce high variance in speed test throughput and latency-under-load measurements relative to drop-tail baselines.
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Symphony: Taming Step Misalignments in the Network for Ring-based Collective Operations
Symphony detects step misalignments in ring collectives via lightweight in-network tracking and mitigates them by throttling outpacing flows with congestion signals, yielding up to 54% better communication times in Astra-Sim simulations and a Tofino2 prototype.
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Characterizing the Impact of Active Queue Management on Speed Test Measurements
AQM schemes produce high variance in speed test throughput and latency-under-load measurements relative to drop-tail baselines.