Processor efficiency

JohnHeald · October 22, 2014, 06:40

Sometimes when I run Flow3D models I find that the CPU usage oscillates. I don’t think it’s writing to disc during the low CPU usage periods, and there’s plenty of memory available.

Does anyone know what might be causing the low %PE?

I've attached a Process Explorer screenshot to demonstrate my problem.

Regards,

John

MuxaB · October 28, 2014, 11:23

Not all models are parallelized. The solver may be switching between parallel and serial regions in the calculations.

The serial regions have been shrinking from release to release, but some remain. What version are you running?

JohnHeald · October 29, 2014, 09:39

I am using hydr3d version 11.0.1.03 win64 2014.

The model I am running makes use of nested conforming blocks. The processor usage seems to fluctuate less when using non-conforming blocks.

MuxaB · October 29, 2014, 23:48

Can you share the input files?

October 28, 2014, 11:23		#2
MuxaB Senior Member michael barkhudarov Join Date: Mar 2009 Location: Sante Fe, New Mexico, USA Posts: 337 Rep Power: 18	Not all models are parallelized. The solver may be switching between parallel and serial regions in the calculations. The serial regions have been shrinking from release to release, but some remain. What version are you running?

October 29, 2014, 09:39		#3
JohnHeald New Member John Heald Join Date: Oct 2014 Posts: 2 Rep Power: 0	I am using hydr3d version 11.0.1.03 win64 2014. The model I am running makes use of nested conforming blocks. The processor usage seems to fluctuate less when using non-conforming blocks.

October 29, 2014, 23:48		#4
MuxaB Senior Member michael barkhudarov Join Date: Mar 2009 Location: Sante Fe, New Mexico, USA Posts: 337 Rep Power: 18	Can you share the input files?