Network Processor Design, Volume 2: Issues and Practices, by Mark A. Franklin, Patrick Crowley, Haldun Hadimioglu, Peter

By Mark A. Franklin, Patrick Crowley, Haldun Hadimioglu, Peter Z. Onufryk

Responding to ever-escalating requisites for functionality, flexibility, and economic climate, the networking has opted to construct items round community processors. to assist meet the ambitious demanding situations of this rising box, the editors of this quantity created the 1st Workshop on community Processors, a discussion board for scientists and engineers to debate most recent examine within the structure, layout, programming, and use of those units. This sequence of volumes includes not just the result of the yearly workshops but in addition particularly commissioned fabric that highlights industry's most recent community processors. Like its predecessor quantity, community Processor layout: rules and Practices, quantity 2 defines and advances the sphere of community processor layout. quantity 2 comprises 20 chapters written via the field's top educational and commercial researchers, with themes starting from architectures to programming types, from safety to caliber of provider. ·Describes present examine at UNC Chapel Hill, college of Massachusetts, George Mason collage, UC Berkeley, UCLA, Washington college in St. Louis, Linköpings Universitet, IBM, Kayamba Inc., community affiliates, and college of Washington. ·Reports the most recent purposes of the know-how at Intel, IBM, Agere, Motorola, AMCC, IDT, Teja, and community Processing discussion board.

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Additional resources for Network Processor Design, Volume 2: Issues and Practices, Volume 2 (The Morgan Kaufmann Series in Computer Architecture and Design)

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15 μm. 2 39 ALU Power Model ALU power depends on the voltage, Vdd ; processor clock frequency, f ; the ALU utilization, aALU ; and capacitance: 2 · aALU · f . 35-μm technology (the process specification of an Alpha 21264 [7] simulated by Wattch) can be obtained as 310 pF. 5 volts. The value for aALU (that corresponds to the ALU utilization, ρALU ) used by Wattch is 1. As discussed later, this value is used to verify the analytic power model by comparing model results with the results obtained from Wattch.

However, this is not a concern, as processor utilization was not our primary design goal. Instead, we tried to achieve a matched throughput between pipeline stages by providing sufficient buffering and decoupling logic. Historically, computer architects and logic designers have assumed that computation is expensive and communication is cheap. But this is no longer valid when the figure of merit is performance in terms of MIPS per mm2 and processor design is limited by wire and not logic delay. 4).

2 Infiniband link Fibre Channel Gigabit Ethernet hardware assist Fibre Channel/ Gigabit Ethernet link Network processor architecture. 3 Layout of eight processor cores. FIGURE the packet-processing operations are partitioned into multiple pipeline stages assigned to separate processors. In our implementation, we chose the pipelined approach because of better utilization of hardware resources, such as i-caches. Examples of network operations that can be assigned to separate pipeline stages are header handling, packet validation, generation of an acknowledgment response, packet reordering and message assembly, and end-to-end control.

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