FIST: A Fast, Lightweight, FPGA-Friendly Packet Latency Estimator for NoC Modeling in Full-System Simulations

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Provided by: Association for Computing Machinery
Topic: Hardware
Format: PDF
FIST (Fast Interconnect Simulation Techniques) is a fast and simple packet latency estimator to replace time-consuming detailed Network-on-Chip (NoC) models in full-system performance simulators. FIST combines ideas from analytical network modeling and execution-driven simulation models. The main idea is to abstractly model each router as a load-delay curve and sum load-dependent delay at each visited router to obtain a packet's latency by tracking each router's load at runtime. The resulting latency estimator can accurately capture subtle load-dependent behaviors of a NoC but is much simpler than a full-blown execution-driven model.
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