====== Week 4 ======

~~NOTOC~~

===== Homework =====

  * Written HW: Ben-Ari p. 39: 
    * Exercises 2, 3, and 4
    * Due: Mon, Feb 11


===== UPC =====

  * Unified Parallel C
  * see resources in sidebar
  * tutorial introduction






==== ssh keys ====
  * you need to set up your accounts for ssh'ing between workstations without password prompts
  * follow these steps to establish a trust connection for your account among our workstations
    - ''$ ssh-keygen'' \\ //hit enter through all the prompts//
    - ''$ cd ~/.ssh''
    - then type this command: <code text>$ cat id_rsa.pub >> authorized_keys2</code>
  * for more information about ssh and public key authentication, see: [[wp>Secure_Shell]]





==== setup ====
  * create a bin directory if you don't already have one:
    * ''$ cd''
    * ''$ mkdir bin''
  * copy my setup script into your bin directory:
    * ''$ cp ~mlsmith/bin/set-upc-env ~/bin''
  * run your setup script:
    * ''$ source ~/bin/set-upc-env''

  * copy the tutorial programs to your account under your course directory:
    * ''$ cd ~/cs377''
    * ''$ cp -r ~mlsmith/cs377-examples/upc ./'' \\ //this will create a ''upc'' directory under your course directory//
  * now you're ready to compile and run! (see sidebar [[tech_ref|technical reference]])

===== Lecture Notes =====

  * Ben-Ari Ch's 1 and 2
    * Ben-Ari slides: {{slides.pdf|PDF}}
      * resume slide 34
    * Formula(number of possible interleavings):
      * # interleavings = (nk)! / (k!)^2
      * where n = # processes and k = # steps / process