I directly edited the *.ini file so that ppn=4, max-num-threads=4,
num-threads=4. The run yielded correct results, however, it took the same
amount of time (about six hours), and apparently used only one thread. This,
despite the fact that the multiple cores are recognized (static_tov.out). This
leaves me wondering if there is anything else I can do to get the multiple
cores used to speed up the computation process.
On Thursday, May 4, 2017 12:52 AM, Ian Hinder <[email protected]> wrote:
On 3 May 2017, at 18:22, Robert Kopp <[email protected]> wrote:
> Do you suppose this could be the problem?
>
> # Source tree management
> sourcebasedir = /home/robert
> optionlist =
> /home/robert/Cactus/repos/simfactory2/mdb/optionlists/ubuntu.cfg
> submitscript = generic.sub
> runscript =
> /home/robert/Cactus/repos/simfactory2/mdb/runscripts/debian.sh
> make = make
> basedir = /home/robert/simulations
> ppn = 1
> max-num-threads = 1
> num-threads = 1
> nodes = 1
I think you need to change ppn to 4 and max-num-threads to 4. If you usually
want to run on 4 threads, you could also change num-threads to 4. You can edit
the file directly.
Erik, is "sim setup" supposed to set these automatically for the current
machine, or is the user supposed to edit the file?
>
> ~/Cactus/simfactory/mdb/machines/robert-desktop.ini
>
> If so, would I change this file directly, or try to override it some other
> way?
>
>
>
> On Wednesday, May 3, 2017 12:51 AM, Ian Hinder <[email protected]> wrote:
>
>
>
> On 3 May 2017, at 05:23, Robert Kopp <[email protected]> wrote:
>
> > The message I sent a little earlier with a file attachment may not reach
> > the list because of its size, 600K or more (includes all the data points in
> > the simulation). Perhaps this will be enough to determine the source of the
> > problem, though--at least, for someone with experience with this
> > application. Otherwise I'll try to reduce the size of the attachment to
> > <60K and find the relevant portions.
> >
> > INFO (Carpet): MPI is enabled
> > INFO (Carpet): Carpet is running on 1 processes
> > INFO (Carpet): This is process 0
> > INFO (Carpet): OpenMP is enabled
> > INFO (Carpet): This process contains 1 threads, this is thread 0
> > INFO (Carpet): There are 1 threads in total
> > INFO (Carpet): There are 1 threads per process
> > INFO (Carpet): This process runs on host robert-desktop, pid=17940
> > INFO (Carpet): This process runs on 8 cores: 0-7
> > INFO (Carpet): Thread 0 runs on 8 cores: 0-7
> > INFO (Carpet): This simulation is running in 3 dimensions
>
> > _______________________________________________
> > Users mailing list
> > [email protected]
> > http://cactuscode.org/mailman/listinfo/users
>
> Hi Robert,
>
> Can you post your machine definition file? This is the file that was created
> when you ran "sim setup". As Roland said, simfactory sets OMP_NUM_THREADS
> itself, so whatever you set in the shell in which you invoke simfactory will
> be ignored. Assuming you want a single process with 4 threads, you should use
>
> --procs 4 --num-threads 4
>
> to the submission command line. This means "run on 4 cores in total, and use
> 4 threads per process". Yes, the terminology is strange.
>
> The defaults for these are stored in your machine definition file. I don't
> think there is any attempt made to default to using all the threads, but I
> might be wrong.
>
> --
> Ian Hinder
> http://members.aei.mpg.de/ianhin
>
>
>
>
> _______________________________________________
> Users mailing list
> [email protected]
> http://cactuscode.org/mailman/listinfo/users
--
Ian Hinder
http://members.aei.mpg.de/ianhin
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