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Simulation CPU cores usage

AllenD

Hi Friends,

Can I please ask a question concerning simulation CPU cores usage. 

When I was using ADS on a Windows PC for simulation, the software will automatically use all the cores and the CPU usage is close to 95%. 

However, now I am using CADENCE IC 617 and MMSIM151 on a Linux machine with 10 cores CPU (20 threads). The simulation setup is like this:

ADE L --> Setup --> High-Performance Simulation Options. Then I click APS. choose Error Preset: DO not override; Use ++aps; Multi_Threading Manual #Threads: 20  (0-19)

But when I try to simulate, the CPU usage is about 40%. Though this is way better when I chose Spectre instead of APS to simulate(that's 5% CPU usage, due to only one thread is working.) 

Can anyone help me? How can I setup the software to use all the CPU power to speed up the simulation?

Thanks

Allen.

Parents
  • Hi Andrew,
    Thanks for your reply. Here is the Circuit Inventory log
    Circuit inventory:
    nodes 2165
    bsim4 277
    bsource_6c11d4 2
    capacitor 886
    diode 1108
    inductor 2
    isource 12
    relay 68
    resistor 1677
    vsource 74

    The circuit I am simulating now is just a part of my entire system. I would expect the number of the transistor will double in the future sim.

    I am running a transient simulation for a certain period of time. It often cost quite a long time for each run. That's why I was wondering if I can utilize all the calculation power from the CPU to speed it up. Do you have any recommendations? Anything can be helpful!

    Thanks
    Allen
Reply
  • Hi Andrew,
    Thanks for your reply. Here is the Circuit Inventory log
    Circuit inventory:
    nodes 2165
    bsim4 277
    bsource_6c11d4 2
    capacitor 886
    diode 1108
    inductor 2
    isource 12
    relay 68
    resistor 1677
    vsource 74

    The circuit I am simulating now is just a part of my entire system. I would expect the number of the transistor will double in the future sim.

    I am running a transient simulation for a certain period of time. It often cost quite a long time for each run. That's why I was wondering if I can utilize all the calculation power from the CPU to speed it up. Do you have any recommendations? Anything can be helpful!

    Thanks
    Allen
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