RE: [EnergyPlus_Support] Runtime: Windows vs Linux

["Griffith, Brent" <brent_griffith@xxxxxxxx>]

I think it is compiler differences.  The release version for Linux uses
Lahey compiler, windows version uses Intel compiler.  I would suggest
getting source (collaborative developer license required) and compiling
it yourself on the machine you will use.  I do this with Intel Fortran
10.1 and have observed shorter runtimes on Linux nodes compared to
windows.  

 

________________________________

From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Taylor, Z Todd
Sent: Monday, April 28, 2008 10:53 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Cc: Taylor, Z Todd
Subject: [EnergyPlus_Support] Runtime: Windows vs Linux

 

In testing the recent version 2.2, it seems the runtime
discrepancy between the Windows version and the Linux version
remains. On the same hardware, I see the Windows version
running about 20% faster than Linux.

Any idea if this is a result of compiler differences?
Different compiler options? Math libraries? Any hope
of rectifying the Linux speed penalty?

We do runs by the thousands on a Linux cluster, so a 20%
improvement would make a huge difference.

--Todd
-- 
Z. Todd Taylor
Manager, Residential R&D
Building Energy Codes Program
Pacific Northwest National Laboratory
Why is it so hard to remember the spelling of "mnemonic"?

 



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