Concurrent I/O system for the hypercube multiprocessor
C3P Proceedings of the third conference on Hypercube concurrent computers and applications - Volume 2
HARTOS: a distributed real-time operating system
ACM SIGOPS Operating Systems Review
Addressing, Routing, and Broadcasting in Hexagonal Mesh Multiprocessors
IEEE Transactions on Computers
Performance Analysis of Virtual Cut-Through Switching in HARTS: A Hexagonal Mesh Multicomputer
IEEE Transactions on Computers
HARTS: A Distributed Real-Time Architecture
Computer - Special issue on real-time systems
A first approach to king topologies for on-chip networks
Euro-Par'10 Proceedings of the 16th international Euro-Par conference on Parallel processing: Part II
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The issue of I/O device access in HARTS — a distributed real-time computer system under construction at the Real-Time Computing Laboratory (RTCL), The University of Michigan — is explicitly addressed. Several candidate solutions are introduced, explored, and evaluated according to cost and complexity, reliability, and performance: (1) “node-direct” distribution with the intra-node bus and a local I/O bus, (2) use of dedicated I/O nodes which are placed in the hexagonal mesh as regular applications nodes but which provide I/O services rather than computing services, and (3) use of a separate I/O network which has led to the proposal of an “interlaced” I/O network. The interlaced I/O network is intended to provide both high performance without burdening node processors with I/O overhead as well as a high degree of reliability. Both static and dynamic multi-ownership protocols are developed for managing I/O device access in this I/O network. The relative merits of the two protocols are explored and the performance and accessibility which each provide are simulated.