[Equest-users] Multithreading

[Michael Mantai]

I¹m currently in an eQuest training class and the instructor said the next
version will not make use of multithreading.  He said eQuest is probably
about a year away from that capability.


On 5/19/11 2:05 PM, "Brian Tysoe" <BTysoe at mcw.com> wrote:

> Hello equest-users,
>  
> Does anyone out there know if the next release of eQuest (based on a new
> version of DOE 2 I believe) will be able to make use of processor
> multithreading?
>  
> We are running into problems modelling large buildings with eQuest 3.64. Files
> are taking upwards of 5 minutes to open and once they are open it takes about
> 8 seconds to modify any single field. If you want to change the flow rate of
> an AHU you enter your number and then wait for 8 seconds while the software
> thinks about it.
>  
> We have done some monitoring and found that the software is running on one
> processor core at 100% and that is the bottleneck.
>  
> Exhibit A: Loading the model
>  
> 
>  
> In this graph (taken while loading the model) you can see that eQUEST¹s CPU
> usage is constant. It is only using one of the available CPU cores and it is
> using that core to the max. Compare this to the Disk usage and you can see
> that the Disk usage spikes up several times but those spikes are relatively
> low.
>  
> Exhibit B: Changing values
>  
> 
>  
> In this graph you can see the CPU usage spike up when I made a change in
> eQUEST and then dip down several seconds after. The Disk usage is still
> sporadic and low.
>  
> We have concluded that adding RAM will not speed things up. The best solution
> is a faster processor.
>  
> Has anyone else done any similar benchmarking and want to share their
> findings?
>  
> Thanks,
>  
>  
> Brian Tysoe M.A.Sc., P.Eng., LEED AP
> Mechanical Engineer
>  
> MCW Consultants Ltd.  <http://www.mcw.com>
> 600-156 Front Street West
> Toronto, ON M5J 2L6
> Phone 416-598-2920
> Fax 416-598-5394 
>  
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>  
> 
> 
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