CA 714CA - Homework #3

This homework covers Chapter 8.

• Assume the overhead to send a zero-length data packet on an Ethernet is 500 microseconds and an unloaded network can transmit at 90% of the peak rating.  Plot the delivered bandwidth as the data transfer size varies frome 32 bytes to 1500 for the following peak ratings.   Plot as separate line for each max bandwidth: 10 Mbit/sec, 100 Mbit/sec, 1000 Mbit/sec.  From the plot, briefly describe the affect of longer data transfer size to the delivered bandwith and the importance of zero-length data packet overhead in each band width case.

• Go to the TPC web site and look at which architecutres clusters vs some form of multiprocessors dominate each benchmark in performance and in cost performance.   Discuss why this vary between benchmarks.
• Do a similar study for Linpack benchmarks (List of Top 500 super computers).  See if there is older versions of the list so you can see how machine types and brand names change over time.