Page History

...

Make sure you have a version of git and python 2.7 installed and have a github account. Also install please pandoc from https://pandoc.org/installing.html (or via your operating system's package manager if such a one exists).

Download

First obtain a copy of the current Einstein Toolkit website and tool to transfer trac tickets to github:

mkdir spin_exercise
cd spin_exercise
git clone git@bitbuckethttps://bitbucket.org:/einsteintoolkit/www.git einsteinwebsitegit clone

mpute the array of energies and store the results in energy[index]. Add code to WaveMoL_Energy that

Exercise

...

website

which downloads a copy of the Einstein Toolkit's website.

Exercise

The exercise is to re-create the front-page of the Einstein Toolkit website as a github pages page in a repository of your own on github and to transfer some tickets from trac to github's issue system.

1. First create a new github repository et_spin2018 in your account,
2. clone it to your laptop and
3. copy and commit the files required to render the Einstein Toolkit front page http://www.einsteintoolkit.org into a branch gh-pages.

4. Push your gh-pages branch to github using

   Code Block
   language cpp

...

for (k=0; k<cctk_lsh[2]; k++)
{
  for (j=0; j<cctk_lsh[1]; j++)
  {
    for (i=0; i<cctk_lsh[0]; i++)
    {
      index = CCTK_GFINDEX3D(cctkGH,i,j,k);
      energy[index] = phit[index]*phit[index] +
        phix[index]*phix[index] +
        phiy[index]*phiy[index] +
        phiz[index]*phiz[index];
    }
  }
}

1. git push --set-upstream origin gh-pages

2. Create a wiki for your github repo and clone the wiki repo to your laptop

   Code Block
   language cpp
   git clone https://github.com/YOUR_USERNAME/et_spin2018.wiki.git

3. use pandoc to convert the ET wiki starting page https://docs.einsteintoolkit.org to github flavored markdown and commit and push it as a page index.md to the wiki repo. To do so, first copy and paste the (updated: 2018-06-27T13:17CDT) wiki (end updated: 2018-06-27T13:17CDT) source code of the wiki page into a file index.wiki then run that file through pandoc.
   

Once done, please send me the URL of your repository on github using my rhaas@ncsa.illinois.edu email address.

Hint

pandoc can tell you what you need to do using its --help option.

You can preview the ET website that you cloned, as well as your proposed one for gh-pages, by opening the file index.html as a local file in your web-browser.

compute the array of energies and store the results in energy[index]. Add code to WaveMoL_Energy that

1. computes the maximum value of energy[index]
2. writes this value as a function of time to a file energy_maximum.xg using the same format as phi_maximum.xg . Time is accessible as the variable cctk_time .

Please compile the code once more, run it and send me the modified source file as well as energy_maximum.xg to me before the interview.

./simfactory/bin/sim build --mdbkey make 'make -j2' 
exe/cactus_sim arrangements/CactusExamples/WaveMoL/par/gaussian.par

Hint

You can access the value of phi as phi[index] and check that your code produces the same results as found in phi_maximum.xg.

If you prefer to use C++ instead of plain C you can rename the file WaveMoL.c to WaveMoL.cc, update the file arrangements/CactusExamples/WaveMoL/src/make.code.defn to list WaveMoL.cc and recompile.

This fragment outputs time:

...

...

Solution

If you get stumped with the exercise, here's a worked out solutionwhat my repository looks like. Obviously you cannot send me this one before the interview .

...