MN
Mario,
The calculations would be performed on the graphics card processor unit (which is a multiprocessor) rather then the CPU, several calculations could be performed at the same time. Calculations which do not depend on each other could be distributed by the processors. There are reported cases where simulations were speed up by 50x to 100x times. This simulation types benefit more from the number of cores rather than the speed.
I'm envisioning some of the time-step calculations could be done in parallel, I think this would be an easy answer from the E+ developers.
Fabio Coelho
--- In EnergyPlus_Support@ yahoogroups. com, M�¡rio Neves <m_neves32@. ..> wrote:
>
> Fabio
> The computer Iâ??m using has a NVIDIA, with CUDA, and EP workÃrkÃ?´s normally, what kind of
difference should there be?
> MN
>
>
>
>
> ____________ _________ _________ __
> From: FCoelho <fabio.coelho@ ...>
> To: EnergyPlus_Support@ yahoogroups. com
> Sent: Mon, December 7, 2009 11:04:52 AM
> Subject: [EnergyPlus_ Support] Re: Multiple instances of EnergyPlus Running at the same time.
>
> Ã?
>
>
> Would Energy+ be eligible to run under CUDA, or any other parallel architecture?
> Stating Wikipedia, "CUDA (an acronym for Compute Unified Device Architecture) is a parallel computing architecture developed by NVIDIA. CUDA is the computing engine in NVIDIA graphics processing units or GPUs that is accessible to software developers through industry standard programming languages."
> I read
about numerous projects, especially CFD calcs which seems to gain much from this on processing time. Also, some libraries "Fortran like" exist, so that Fortran users can easily migrate their code.
>
> FCoelho
>
> --- In EnergyPlus_Support@ yahoogroups. com, "Phylroy" <phylroy.lopez@ ...> wrote:
> >
> >
> > Ah I see....
> >
> > To run E+ from another folder and avoid simulation conflicts, you just need to run it from in a separate folder.
> >
> > 1. The .ini file pointing to the root installation folder. like [program]
> > dir=C:\ENERGY~ 1\)
> > 2. A idf file named "In.idf"
> > 3. A EPW file names "In.epw"
> > Then while in the separate folder, run.
> > C:\EnergyPlusV4- 0-0\energyplus. exe
> >
> >
> >
> > The RunEplus makes sure old files are gone, changes the name of the
weather and idf files to the above.
> >
> >
> > I'm writing a small threaded ruby script to divide an annual simulation into the number of cpus-cores to speed up the runtime and then eventually add up the energy, find the peaks, and underheated hours, using the eso or the sql output. I have an 8-core computer and want to take advantage of it. I'll post the first part of it if anybody is interested.
> >
> > Phylroy
> >
> >
> >
> >
> >
> >
> > --- In EnergyPlus_Support@ yahoogroups. com, Linda Lawrie <linda@> wrote:
> > >
> > > you can have the Energy+.ini point to the root folder but you will need to
> > > have the others running in "separate" folders.
> > >
> > > Folder a
> > > Energy+.ini points to the root
> > > runeplus.bat is set to copy
in.idf, etc into the folder and then run
> > > the program from the root folder
> > >
> > > Folder b
> > > same set up.
> > >
> > > On Sun, 06 Dec 2009 01:23:39 -0000, "Phylroy" <phylroy.lopez@ >
> > > wrote:
> > > > Hey There,
> > > >
> > > >
> > > > I'm trying to run multiple instances of E+ via a script using the bat
> > > > files.
> > > >
> > > > I can't use a GUI solution like jeplus. I need it to run from another
> > > > program. I can run a single instance fine. But if I do more than one I
> > > get
> > > > a crash.
> > > >
> > > > Now this is due to the intermediate files that E+ creates in its root
> > > > folder. The second simulation tries to open a file the
first simulation
> > > has
> > > > already created and has locked, killing the second simulation.
> > > >
> > > > Is there a method to tell e+ to place its intermediate files in antother
> > > > location? I've tried changing %output_path% variable with no success.
> > > >
> > > >
> > > >
> > > >
> > > > Thanks!
> > > >
> > > > Phylroy
> > > >
> > > >
> > > >
> > > > ------------ --------- --------- ------
> > > >
> > > > The primary EnergyPlus web site is found at:
> > > > http://www.energypl us.gov
> > > >
> > > > The group web site is:
> > > > http://groups. yahoo.com/ group/EnergyPlus _Support/
> > > >
> > > > Attachments are currently allowed but be mindful that not everyone has a
> > > > high speed connection. Limit attachments to small files.
> > > >
> > > > EnergyPlus Documentation is searchable. Open EPlusMainMenu. pdf under the
> > > > Documentation link and press the "search" button.
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> >
>