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CPU & Simulation time

Experimenter
Experimenter

Hello.

Maybe a little offtopic, sorry I couldn´t find a better forum to ask.
I´m interested to know how simulation time correlates with the used CPU.

I see in the system requirements for Version 12 that a Core i5-4430 or i7-4470 is recommended

Lets say I have experiments that run about 30 minutes on a 5 year old Core M580 CPU (distributed simulation).
What is the best benchmark to look at if I want to know how much faster a newer CPU would be?
Benchmarks rarely attribute to much but is there any indicator that would tell me the likely benefit?

Thanks in advance

8 REPLIES

Re: CPU & Simulation time

Siemens Phenom Siemens Phenom
Siemens Phenom

Hello Satras,

 

a good indicator is the time for a simulation run in our small parts production example model.

 

If you right click in the console window and turn on debug output it will show you the CPU time after a simulation run.

 

Just run the simulation in the Assembly1 frame until it stops in fast-forward mode (i.e. without animation). The you can compare the CPU time which is printed to the console window.

 

Regards,

Ralf

Regards,

Ralf
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Re: CPU & Simulation time

Experimenter
Experimenter

Thank you for your fast response.
Since I´m in the market for a new laptop I´m trying to check if the additional costs of a Core i7-4810MQ compared to an i5-4200M are justifiable. I don´t expect someone has these two or similar cpus laying around, so I would like to know which benchmark is best comparable to the scenario you described. Benchmarks are widely available, real plant simulation usage data not so much.

Re: CPU & Simulation time

Siemens Phenom Siemens Phenom
Siemens Phenom

If you are interested in single simulation run performance you should look for a CPU benchmark which runs in a single thread, doesn't have mostly floating point calculations and deals with large memory so that the CPU cache cannot cache the whole program.

Regards,

Ralf
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Re: CPU & Simulation time

Experimenter
Experimenter

Okay thanks again!

 

Just for reference:

 

Small Parts Production on Plant Simulation v12.0.0 with Intel Core i5 M 580

  • .Models.Assembly1.EventController: Events processed = 79615,  Real-time factor = 40860.4, CPU Time = 2.01s, Events/CPU second = 39561.96  (without animation)

 

  • .Models.Assembly1.EventController: Events processed = 490810,  Real-time factor = 12180.2, CPU Time = 7.04s, Events/CPU second = 69760.48 (with animation)

 

I will edit this post with the new results in the coming days/weeks.

 

Re: CPU & Simulation time

Siemens Phenom Siemens Phenom
Siemens Phenom

Just to add some comparison numbers:

 

 

Intel Xeon E3-1270:

 

CPU Time (without animation): 0.83s

CPU Time (with animation):      2.36s

Regards,

Ralf
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Re: CPU & Simulation time

Valued Contributor
Valued Contributor

Hello,

I am wondering where I can find the document describing the recommended system requirements for Plant Simulation v12? I am on the lookout for a new computer that can run the simulations as fast as possible without regards to the computer cost.

Does anyone have any recommendations if you regard these criteria:

1. Disregard any monetary cost involved.
2. Assume the model is fully optimized for performance

What would your absolutely optimal and most powerful computer configuration look like?

I have heard from a source that the limiting factor of simulations is the graphis card, however I am very skeptical of this statement as the processor seems to be the number one factor for performance since Plant Simulation V12 doesn't use CUDA, along with the requirement for a large amount of memory if running large models. There seems to be no graphics intensive calculations unless you use the 3D models, which I am not.

Thank you!

Re: CPU & Simulation time

Siemens Phenom Siemens Phenom
Siemens Phenom

Hello ET_Boys,

 

the most relevant component here is indeed the CPU. (Assuming that you have enough RAM to fit your model size.)

 

I would recommend the current Core i7 with the highest available clock rate.

 

If you don't use 3D the graphics card doesn't matter.

 

Regards,

Ralf

Regards,

Ralf
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Re: CPU & Simulation time

Experimenter
Experimenter

Hello,

 

I finally got my new notebook:

 

Small Parts Production on Plant Simulation v12.0.2 with Intel Core i7-4810MQ
.Models.Assembly1.EventController: Events processed = 79675,  Real-time factor = 137748.1, CPU Time = 0.61s, Events/CPU second = 130957.41 (without animation)
 
.Models.Assembly1.EventController: Events processed = 490911,  Real-time factor = 46609.4, CPU Time = 1.86s, Events/CPU second = 264440.77 (with animation)

 

Our big models are also a lot faster.