On-chip wireless manycore architectures

Recent computer architecture trends herald the arrival of massive multiprocessors with more than a hundred processor cores within a single package. In this setting, on-chip communication becomes increasingly important, as parallel programs increase the amount of data sharing and signaling between cores. Unfortunately, traditional on-chip networks have been proven to not scale well in terms of latency or energy consumption, slowing down the computation, and jeopardizing the scalability of hundred-core processors. On-chip wireless networks are a novel interconnect paradigm that holds considerable promise for overcoming the communication challenges left unmet by wired networks-on-chip, and for enabling such massive multicore chips. In this thesis, we propose several applications of on-chip wireless technology for manycore architectures, namely: Replica, a manycore that uses wireless communication for synchronization and communication-intensive data; WiDir, which uses on-chip wireless technology to augment a conventional invalidation-based directory cache coherence protocol; and WiChip, a chiplet-based architecture that uses a wireless network to attain scalable communication. Besides the aforementioned applications of on-chip wireless technology, in this thesis we also address some of the challenges that come with the technology. One of the main challenges of on-chip wireless technology is the design of methods that provide fast and efficient access to the wireless channel while adapting to the constant traffic changes within and across applications. Hence, we propose Fuzzy-Token, a simple medium access control protocol that leverages the unique properties of the on-chip scenario to deliver efficient and low-latency access irrespective of the application characteristics.U of I OnlyAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD syste

Fuzzy-token: An adaptive Mac protocol for wireless network-on-chip

Recent computer architecture trends herald the arrival of massive multiprocessors with more than a thousand processor cores within a single chip. In this context, as parallel programs continue to increase the amount of data sharing and signaling between cores, on-chip communication becomes a critical issue. Unfortunately, traditional on-chip networks have been proven to not scale well in terms of latency or energy consumption, slowing down the computation in thousand-core processors. The Wireless Network-on-Chip (WNoC) paradigm holds considerable promise for the implementation of on-chip networks that will enable such massive multicore chips. One of the main challenges, however, resides in the design of methods that provide fast and efficient access to the wireless channel while adapting to the constant traffic changes within and across applications. Existing approaches are either cumbersome or do not provide the required adaptivity. We propose Fuzzy-Token, a simple protocol that leverages the unique properties of the on-chip scenario to deliver efficient and low-latency access irrespective of the application characteristics. We substantiate our claim via simulations with a synthetic traffic suite and real application traces.U of I OnlyAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD syste

Fuzzy-token: An adaptive Mac protocol for wireless network-on-chip

Recent computer architecture trends herald the arrival of massive multiprocessors with more than a thousand processor cores within a single chip. In this context, as parallel programs continue to increase the amount of data sharing and signaling between cores, on-chip communication becomes a critical issue. Unfortunately, traditional on-chip networks have been proven to not scale well in terms of latency or energy consumption, slowing down the computation in thousand-core processors. The Wireless Network-on-Chip (WNoC) paradigm holds considerable promise for the implementation of on-chip networks that will enable such massive multicore chips. One of the main challenges, however, resides in the design of methods that provide fast and efficient access to the wireless channel while adapting to the constant traffic changes within and across applications. Existing approaches are either cumbersome or do not provide the required adaptivity. We propose Fuzzy-Token, a simple protocol that leverages the unique properties of the on-chip scenario to deliver efficient and low-latency access irrespective of the application characteristics. We substantiate our claim via simulations with a synthetic traffic suite and real application traces.U of I OnlyAuthor requested U of Illinois access only (OA after 2yrs) in Vireo ETD syste