[Users] EinsteinToolkit on the Janus supercomputer

[Erik Schnetter]

Bruno

If you can submit jobs from the compile node, then the login node would be
a "trampoline" in Simfactory's language. You would create a machine
description for it, but leave most entries empty.

If the compile node is only used for compiling, then you could add the
necessary ssh command to the make command, e.g. "make = ssh compile-node
make".

-erik

On Thu, Sep 20, 2012 at 8:27 PM, Bruno Giacomazzo <
bruno.giacomazzo at jila.colorado.edu> wrote:

> Hi Erik,
> thanks a lot for the script. I will let you know what I get.
>
> I will circulate the files necessary for simfactory as soon as I'm sure
> that everything is working properly. One "problem" I have now is that Janus
> requires users to compile codes on a compile node which is only accessible
> via the login node. I don't know if it is possible to configure simfactory
> in order to be able to access the compile node via the login node. If not,
> I can also ask the administrators if there is a way to access the compile
> node directly, without having to first login on the login node. At the
> moment I compiled the code directly on Janus instead of doing it remotely
> from my laptop.
>
> Cheers,
> Bruno
>
> On Sep 20, 2012, at 6:03 PM, Erik Schnetter wrote:
>
> 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
>>
>> ----------------------------------------------------------------------
>> There are only 10 types of people in the world:
>> Those who understand binary, and those who don't
>> ----------------------------------------------------------------------
>>
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at einsteintoolkit.org
>> http://lists.einsteintoolkit.org/mailman/listinfo/users
>>
>>
>
>
> --
> Erik Schnetter <schnetter at cct.lsu.edu>
> http://www.perimeterinstitute.ca/personal/eschnetter/
>  <bench-create>
>
>
> 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
>
> ----------------------------------------------------------------------
> There are only 10 types of people in the world:
> Those who understand binary, and those who don't
> ----------------------------------------------------------------------
>
>


-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
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