CSC/ECE 506 Spring 2012/8a cj: Difference between revisions
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[[Image:MESIFVMESI.jpg|thumb|upright|center|450px|<b>Figure 4:</b> Reduced Traffic with MESIF Protocol [http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4606981&tag=1]]] | [[Image:MESIFVMESI.jpg|thumb|upright|center|450px|<b>Figure 4:</b> Reduced Traffic with MESIF Protocol [http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4606981&tag=1]]] | ||
=Protocol Performance= | =Protocol Performance= | ||
Protocol performance is strongly linked to the program that is running on the parallel system. This complicates protocol performance evaluation and prevents the designer from definitively choosing the best protocol. This binding of program and protocol makes "Making design decisions in real systems ... part art and part science. The art is the past experience, | |||
intuition, and aesthetics of the designers, and the science is workload-driven evaluation." [http://books.google.com/books?id=MHfHC4Wf3K0C&pg=PA620&lpg=PA620&dq=Culler+and+Singh+1998&source=bl&ots=1KHO-a3JXQ&sig=ZEZ0Xjer6Y4IJJgm6GXjnerYnkI&hl=en&sa=X&ei=ko9oT4LfH4aPsQKItY2wCQ&ved=0CCsQ6AEwAQ#v=onepage&q=Culler%20and%20Singh%201998&f=false] | |||
[[Image:ProtocolTraffic.jpg|thumb|upright|center|450px|<b>Figure 5:</b> Traffic for various protocols [http://ams.ict.ac.cn/wp-content/uploads/2012/03/Parallel-computer-architecture.pdf]]] | [[Image:ProtocolTraffic.jpg|thumb|upright|center|450px|<b>Figure 5:</b> Traffic for various protocols [http://ams.ict.ac.cn/wp-content/uploads/2012/03/Parallel-computer-architecture.pdf]]] | ||
[[Image:TypeOfMiss.jpg|thumb|upright|center|800px|<b>Figure 6:</b> Type of Miss [http://ams.ict.ac.cn/wp-content/uploads/2012/03/Parallel-computer-architecture.pdf]]] | [[Image:TypeOfMiss.jpg|thumb|upright|center|800px|<b>Figure 6:</b> Type of Miss [http://ams.ict.ac.cn/wp-content/uploads/2012/03/Parallel-computer-architecture.pdf]]] | ||
Revision as of 14:26, 20 March 2012
MSI, MESI, MESIF, and MOESI protocols on real architectures
MSI Protocol
MESI Protocol
Five State Protocols
MOESI
MESIF
Protocol Performance
Protocol performance is strongly linked to the program that is running on the parallel system. This complicates protocol performance evaluation and prevents the designer from definitively choosing the best protocol. This binding of program and protocol makes "Making design decisions in real systems ... part art and part science. The art is the past experience, intuition, and aesthetics of the designers, and the science is workload-driven evaluation." [4]
