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During the transition to packet-switched on-chip networks we lose the relative timing and ordering of requests, which are essential for shared memory coherency and the communication of spikes in hardware-based artificial neural networks. We present a bufferless network architecture that enforces a time-based sharing of multi-hop single-cycle paths, providing guaranteed services at low cost. We guarantee...
In the many-core era, the network on-chip (NoC) is playing a larger role in meeting performance, area and power goals, as router buffers contribute greatly to NoC area and power usage. Proposals have advocated bufferless NoCs, however a performance wall has been reached such that high throughput performance has not been extracted. We present SCEPTER, a high-performance bufferless mesh NoC that sets...
Router buffers are the main reason for the Network-on-Chip's (NoC) scalable bandwidth, but consumes significant area and power. The SCEPTER bufferless NoC sets up single-cycle virtual express paths dynamically, allowing packets to traverse non-minimal paths without latency penalty. Using prioritization, bypassing, and throttling mechanisms, we maximize opportunities to use these paths while pushing...
In the many-core era, scalable coherence and on-chip interconnects are crucial for shared memory processors. While snoopy coherence is common in small multicore systems, directory-based coherence is the de facto choice for scalability to many cores, as snoopy relies on ordered interconnects which do not scale. However, directory-based coherence does not scale beyond tens of cores due to excessive...
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