[Users] cactus performance

[Jose Fiestas Iquira]

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 at 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 at lbl.gov>
> *To:* Ian Hinder <ian.hinder at aei.mpg.de>; users at 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 at 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)
>
> iQIcBAEBCAAGBQJPaelqAAoJEOkzpip+I59kRocP/RZl0R9MEiM5r/HfB+JZkwXs
> cA3eXKJeqiHtzsmqqruH/AI7zcR8zpq+BsrWHmtJQecqp28JqoV1+G7V8Z7cB/os
> 4pI0KFQQ6npRmnWytBSLrextanvLooqFgEB62S78MsyucTgzJwVX1AOkDuYQpHPO
> 3V6LQO7Jmcj5m2OoVr74mI/IFDermdwE/84dyjbz5tRrKPTug7qjfjFrfKT9yysK
> unA6oKl9zEdm1KZvDKzPTPh6hCcI1NNC+uRoNMnBu3XQprgNvZ/N8iDomrodCjhO
> iqKy5DVBhZVJhh//dWYuTzRu/l0MPMv4WML0OJmeLgbYerW2m+17lwAgumtccqwk
> OOuGTUqVfF9VuHJQ17jZ4jVyAjl9pIHENJCDZjmwNBDONinUC3Igjza3YlSHOCzU
> 1QUU1eomrSvA1oKThfaTKj+vpd+IjncucmQAtVW5rsiMjKQoOMajyR13kMJ6e8Y6
> uooQr8wXJBJqiN48QBS3XvGTixvAeXmT+bQtBpocyr6vN4vEPBfwWymTn2sfd/XA
> vd/7Rps/IH9x3bbkk3eqCHiHrxvqPBfNdm/KbI20SZUT88XbFawuL7l1X3UgKCLv
> fjRNPFxtHQsz3CYk/z6YllKgf6xp34XYshtGnl6LE9lS2If8GOXIMR+MdgGJndre
> FXx7kXx6Oj4TLYsqOE0f
> =vnYk
> -----END PGP SIGNATURE-----
>
>
>
> _______________________________________________
> Users mailing list
> Users at einsteintoolkit.org
> http://lists.einsteintoolkit.org/mailman/listinfo/users
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.einsteintoolkit.org/pipermail/users/attachments/20120326/277c2ddc/attachment-0001.html