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PAR Class 2, Thu 2022-01-13

1 Note the files button in the top bar

In that dir:

class??.mp4

has videos of the remote classes.

transcript??.txt

generated by Webex for those videos

handwritten??.txt

my handwritten notes during the class

misc other files

used in class

2 LLNL parallel tutorial

We'll do it. https://computing.llnl.gov/tutorials/parallel_comp/

3 Material

  1. Think about these questions.

    1. Why have machine cycle speeds stopped increasing?

    2. What architectures do the top 3 machines on the Top 500 list use?

    3. Which one of the following 4 choices are most GPUs: SISD, SIMD, MISD, MIMD.

    4. Which one of the following 4 choices are most current multicore CPUs: SISD, SIMD, MISD, MIMD.

    5. Per Amdahl's law, if a program is 10% sequential and 90% parallelizable, what is the max speed up that can be obtained with an infinite number of parallel processors?

4 Recently obsoleted parallel tech

  1. Intel Xeon Phi

  2. IBM BlueGene

5 My research

I do parallel geometry algorithms on large problems for CAD and GIS. See my home page. If this is interesting, talk to me. Maybe you can do something that leads to a jointly-authored paper.