.. title: PAR Class 2, Thu 2022-01-13
.. slug: class02
.. date: 2021-01-12
.. tags: class
.. category: 
.. link: 
.. description: 
.. type: text


.. sectnum::
.. contents:: Table of contents
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Note the files button in the top bar
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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



LLNL parallel tutorial
----------------------

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


Material
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#. Think about these questions.

   a. Why have machine cycle speeds stopped increasing?
   #. What architectures do the top 3 machines on the Top 500 list use?
   #. Which one of the following 4 choices are most GPUs: SISD, SIMD, MISD, MIMD.
   #. Which one of the following 4 choices are most current multicore CPUs: SISD, SIMD, MISD, MIMD.
   #. 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? 


Recently obsoleted parallel tech
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#. Intel Xeon Phi
#. IBM BlueGene



My research
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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.