[Users] EinsteinToolkit on the Janus supercomputer

[Erik Schnetter]

Bruno

Congratulations! Feel free to add the Janus option lists etc. to Simfactory.

I've use a TOV star in the past for benchmarks. I attach a Perl script that
creates parameter files.

There are a few lines in the beginning where you choose some parameter
ranges. You probably want to set hydro to 1, mincores to the number of
cores per node, and adjust maxcores as you see fit. You should also define
the number of threads that should be used; this list may contain only a
single number if you want. Start by setting run_list to (0).

This will create parameter files that use approximately the amount of
memory requested (500 MB per core), and will run approximately for the
amount of time requested (300 s).

The script will create a number of parameter files. You would submit them
all, running each once. You would look at carpet::timing..asc of each
simulation, and look at column 22 there ("total_grid_points_per_second").
This is the benchmark results, and excludes startup and initialisation time.

-erik

On Thu, Sep 20, 2012 at 6:55 PM, Bruno Giacomazzo <
bruno.giacomazzo at jila.colorado.edu> wrote:

> Hi,
> I have installed the EinsteinToolkit (Lovelace) on the Janus supercomputer
> here at the University of Colorado Boulder (
> https://www.rc.colorado.edu/resources/janus). Most of the testsuites pass
> (see also summary.log attached). The ones that give more problems are those
> from QuasiLocalMeasures which all fail because of segfault and I will try
> to understand why.
>
> I'd like to know if there is a "standard" benchmark parameter file that I
> can use to test the performance of GRHydro on Janus. Ideally it would be
> something simple (e.g., a TOV, so that I could use a very similar parfile
> to compare also GRHydro vs Whisky) and that you have used on other
> machines. I'm in particular interested in testing its weak scaling and
> possibly also its strong scaling.
>
> Thanks,
> Bruno
>
> Dr. Bruno Giacomazzo
> JILA - University of Colorado
> 440 UCB
> Boulder, CO 80309
> USA
>
> Tel.  : +1 303-492-5170
> Fax  : +1 303-492-5235
> email : bruno.giacomazzo at jila.colorado.edu
> web: http://www.brunogiacomazzo.org
>
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> ----------------------------------------------------------------------
>
>
>
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-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
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