Homework P&H Ch. 6 and 7

Answer the following questions about Patterson and Hennessy, Chapters 6 and 7. You only need to turn in those that have a point count assigned.

  1. What is the most important difference between the north bridge and the south bridge in a modern computer's chip set?
  2. (1 point) What is the primary function of the transport layer?
  3. What is the primary function of the network layer?
  4. (1 point) What is DMA?
  5. (1 point) A program is optimized by running parts of it in parallel on a machine with 4 processors. Before optimization, the parallelized part of the program accounted for 80% of the run time of the program. What is the overall speedup ratio resulting from this optimization, disregarding communication overhead?
  6. (1 point) What do UMA and NUMA mean in the context of multiprocessor architectures. In addition to expanding the acronyms, you answer should indicate the significance in terms of memory organization.
  7. (1 point) What do the acronyms SISD, SIMD, MISD, and MIMD mean?
  8. (1 point) If multiple processors have private memory address spaces how can they communicate?