Re: [EnergyPlus_Support] E+ performance on Windows 7 64 bit much worse than in XP 32 bit

On Wed, Aug 29, 2012 at 1:35 PM, Linda Lawrie <linda@xxxxxxxxxxxxxx> wrote:

As all things in .eio files, there is a header that explains the data lines:

! <Program Control Information:Threads/Parallel Sims>, Threading Supported,Maximum Number of Threads, Env Set Threads (OMP_NUM_THREADS), EP Env Set Threads (EP_OMP_NUM_THREADS). IDF Set Threads, Number of Threads Used (Interior Radiant Exchange), Number NominalSurface, Number Parallel Sims

At 02:32 PM 8/29/2012, hnoboam wrote:

I am running batches of 13 simulations and I noticed a serious degradation of EnergyPlus performance under Windows 7. The two machines used are:
Machine 1: Intel Core Duo T9600 2.8GHz, 4.00 GB ram, Windows 7 64 bit

Machine 2: Intel Core i5-250M   2.5GHz, 2.98 GB ram, Windows XP 32 bit

Ran the same batch of 13 simulations. From the eio files:
Machine 1:
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 2, 158, 1
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,2, 1, 1, 1, 1, 158, 2
Elapsed time: 152 minutes

Machine 2: From the eio files:
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 4, 158, 1
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Program Control:Threads/Parallel Sims, Yes,4, 1, 1, 1, 1, 158, 2
Elapsed time: 73 minutes.

What is the meaning of the fours versus the twos in the first column?
Anything I could do to improve EnergyPlus performance under Win7?

Thanks,
Homero.

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