By Mark A. Franklin, Patrick Crowley, Haldun Hadimioglu, Peter Z. Onufryk
The previous few years have visible major switch within the panorama of top-end community processing. based on the bold demanding situations dealing with this rising box, the editors of this sequence got down to survey the newest examine and practices within the layout, programming, and use of community processors.
Through chapters on undefined, software program, functionality and modeling, quantity three illustrates the possibility of new NP purposes, assisting to put a theoretical beginning for the structure, assessment, and programming of networking processors.
Like quantity 2 of the sequence, quantity three extra shifts the point of interest from reaching better degrees of packet processing functionality to addressing different serious components akin to ease of programming, program advancements, energy, and function prediction. furthermore, quantity three emphasizes forward-looking, modern examine within the parts of structure, instruments and strategies, and purposes comparable to high-speed intrusion detection and prevention procedure layout, and the implementation of recent interconnect criteria.
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Additional resources for Network Processor Design, Volume 3: Issues and Practices
Our approach attempts to maximize performance given constrained resources and an allowable error rate. 2 OUR APPROACH Network cache designs typically employ simple set-associative hash tables, ideas that are borrowed from their traditional memory management counterparts. The goal of the hash tables is to quickly determine the operation or forwarding interface that should be used, given the ﬂow identiﬁer. Hashing the ﬂow identiﬁer allows traditional network processors to determine what operation or forwarding interface should be used while examining only a couple of entries in the cache.
C. Hansen, “Proﬁle guided code positioning,” Proceedings of the ACM SIGPLAN ’90 Conference on Programming Language Design and Implementation (SIGPLAN ’90), pp. 16–27, June 1990.  R. Kumar and D. M. Tullsen, “Compiling for instruction cache performance on a multithreaded Architecture,” Proceedings of the 35th Annual ACM/IEEE International Symposium on Microarchitecture, pp. 419–429. IEEE Computer Society Press, 2002.  J. Engblom and A. Ermedahl, “Modeling complex ﬂows for worst-case execution time analysis,” Proceedings of 21st IEEE Real-Time Systems Symposium (RTSS ’00), 2000.
A is hashed again to H2 (A), and compared to all four elements of the cache line. There is no match. The result H2 (A) is the digest of the ﬂow identiﬁer that is stored. c. A is classiﬁed by a standard ﬂow classiﬁer, and is found to route to interface 3. d. The signature H2 (A), is placed in cache line H1 (A), along with its routing information (interface 3). e. The packet is forwarded through interface 3. 2. Packet 2 arrives from ﬂow A. a. The ﬂow identiﬁer of A is hashed to H1 (A) to determine the cache line to look up.