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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Izu, C. Miguel-Alonso, J. Gregorio, J.A. |
| Copyright Year | 2005 |
| Description | Author affiliation: Sch. of Comput. Sci., Adelaide Univ., SA, Australia (Izu, C.) |
| Abstract | Recent parallel systems use multiple injection ports and various injection policies, but little is known about their impact on network performance. This paper evaluates the influence that these injection interfaces have on maximum sustained throughput in adaptive cut-through torus networks by modeling the number of injection queues (1 or 4), and the allocation of new packets to those queues. Network evaluations for medium to large size 2D tori show that designs with multiple injection ports do not improve performance under uniform traffic. On the contrary, they result in more pressure from the injection interface to acquire the scarce network resources of an already clogged system. Interestingly, for small networks, a single injection FIFO queue, with the HOLE it entails, indirectly provides the much needed injection control. For networks with thousands of nodes and multiple injection channels, as those being implemented in current massively parallel processors, this implicit form of congestion control is not enough. In such systems, restrictive injection policies are required to prevent routers from being flooded with new packets for loads beyond saturation. |
| File Size | 264003 |
| File Format | |
| ISBN | 076952513X |
| ISSN | 10666192 |
| DOI | 10.1109/PDP.2006.32 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-02-15 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Throughput Routing Computer architecture Adaptive systems Traffic control Intelligent networks Computer science Communication system traffic control Communication system control Multiprocessor interconnection networks |
| Content Type | Text |
| Resource Type | Article |
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