Cactus::terminate = "time"

Cactus::cctk_final_time = .1

usually this time was 100.

Am I missing something else in setting the time for a short simulation? I could not find it in the documentation.

Thanks,

Jose

On Mon, Mar 26, 2012 at 10:44 PM, Jose Fiestas Iquira <jafiestas@lbl.gov> wrote:

Dear Uschi,

Thanks. I am right now trying CrayPat. I learned about it some days ago and tried my own N-cody code with CrayPat. I am using now the McLachlan Cactus thorn for my applications.

I am just not sure about the way to compile the code before running CrayPat. I was using simfactory for compilation and now I am using gmake directly. Since compilation takes some time, I am waiting for it to finish. Let see if it works.

The reason I am interested in Flops is because I want to know if my Cactus application will scale together with my own N-body runs in large machines and reach Petascale.

Btw, did you try CrayPat with Cactus? You use gmake for compiling?

Best,
Jose

On Mon, Mar 26, 2012 at 10:20 PM, Ursula Gamma <uschigamma@yahoo.com> wrote:

Dear Jose,

I think the best is you use a performance checking tool coming with your computer. For example PAPI or
CrayPat (on your lbl machine: http://www.nersc.gov/users/software/debugging-and-profiling/craypat/). You need to access hardware counters for getting the flops; this is not a software feature. Counting flops is so last century, though, and nobody talks about this these days. I am usually just interested in getting the shortest possible walltime for a given problem I want to solve with my Uschi evolution code in the Cactus framework.

Uschi

----------------
Uschi T. Gamma
Assistant to the SC, TAPIR, Caltech

From: Jose Fiestas Iquira <jafiestas@lbl.gov>
To: Ian Hinder <ian.hinder@aei.mpg.de>; users@einsteintoolkit.org
Sent: Monday, March 26, 2012 8:58 PM

Subject: Re: [Users] cactus performance

Hello,

Thanks for the information. I had a look at the benchmarks and profiling links on the Cactus website, and would like to find out the way to calculate Flops performed by a Cactus application. Are they some numbers published? In one of the papers you sent to me I found timings of McLachlan (which is my application), but I could not find Flops per simulation.

It seems to me I could be able to run my application using .par-files prepared for benchmarking? Please correct me if I am wrong.

My goal is to have an idea of the Flops expected by McLachlan runs on larger machines (few thousands or cores).

Thanks,
Jose

2012/3/21 Frank Loeffler <knarf@cct.lsu.edu>

On Wed, Mar 21, 2012 at 01:15:05PM +0100, Ian Hinder wrote:
> Frank, do you know what the following links have changed into?
>
> http://www.cct.lsu.edu/xirel/
> http://www.cct.lsu.edu/CCT-TR/CCT-TR-2008-5

Good question, I made an inquiry.

Frank

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)
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=vnYk
-----END PGP SIGNATURE-----

_______________________________________________
Users mailing list
Users@einsteintoolkit.org
http://lists.einsteintoolkit.org/mailman/listinfo/users