CSC506

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Peer-reviewed Assignment 1

• Sections 1.1 and 1.1.2: Update performance trends in

multiprocessors.

• Section 1.1.1, first half: Scientific/engineering application

trends. What characterizes present-day applications? How much memory, processor time, etc.? How high is the speedup?

• Section 1.1.1, second half: Commercial application trends.

What characterizes present-day applications? How much memory, processor time, etc.? How high is the speedup?

• Section 1.1.3: Architectural trends. How have architectures

changed in the past 10 years? Update Figs. 1.8 and 1.9 with new points, for 2000, 2002, 2004, 2006, and 2007.

• Section 1.1.4: Supercomputers. Compare current supercomputers

with those of 10 yrs. ago. Update Figures 1.10 to 1.12 with new data points. For 1.12, consult top500.org.

• Sections 1.2.1 and 1.2.4: Communication architecture. Trends in

last 10 years. How has data parallelism found its way into shared- memory and message-passing machines? An early example would be MMX. Would you change the number of layers in Fig. 1.13?

• Section 1.2.2: Shared address space. Any changes in the

organization of address spaces in the last 10 years? Are the interconnection structures different in new computers now than they were 10 years ago? What is the size and capacity of current SMPs? How have supercomputers evolved since the Cray T3E?

• Section 1.2.3: Message passing. Update. Are blade servers an

extension of message passing? How have blade architectures evolved over the past 10 years?

• Section 1.2.5: Trends in vector processing and array

processing. New machines have recently been announced. Why will this be an important architectural dimension in the coming years?

• Section 1.2.6: New developments in dataflow and systolic

architectures, if any. Or if not, why are these styles not evolving with time?

• Sections 1.3.1 and 1.3.2: Communication and programming model.

How have reordering strategies evolved to accommodate larger multicomputers? Have new kinds of synchronization operations been developed? I doubt that other topics covered in these sections have changed much, but do check.

• Sections 1.3.3 and 1.3.4: Most changes here are probably related

to performance metrics. Cite other models for measuring artifacts such as data-transfer time, overhead, occupancy, and communication cost. Focus on the models that are most useful in practice.