Actually, one solution for parallel processors that is
relatively easy to implement is to split the simulation period into number of
processors and do periods simultaneously. For example, for quad core machine,
do 1/1 to 3/31 on the 1st, 4/1 to 6/30 on the 2nd, 7/1 to
9/30 on the 3rd and 10/1/to 12/31 on the fourth processor.
We tested this option without any overlap (i.e., to increase
accuracy one can start few days earlier each period) and the results were functionally
identical with the run that was done in sequence on one processor. The running
time was 4 times shorter using parallel processors, though.
This is implementable on the level of user interface and can be
nicely scaled to the number of available processors, so we don’t necessarily need
E+ team to provide this option, but it would surely be nice thing ;-)
Charlie
DesignBuilder Software
From:
EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On
Behalf Of L Lawrie
Sent: Tuesday, December 29, 2009 8:13 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: 64 bit Windows 7
There are many factors in software utilizing more resources in computing. EnergyPlus
simulation processes may never be adapted to parallel processing -- the
simulation process don't necessarily lend itself to advantage of parallel
processors.
EnergyPlus must be taking as much memory as it needs. The memory it needs
depends on the number of zones, surfaces, etc.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx,
"Danny Bishop" <bish.dj@...> wrote:
>
> That�s a pity, I agonised over the potential s/ s/w incompatability issues
with 64 bit, then bit the bullet, no probs yet, but no benefit either! Any
chance of this being rectified in the near future as the E+ computation is
obviously crying out for more ram. Mine ticks along at 30% while the processor
is busting out at 100%
>
>
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