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Will different save options cause different Spectre simulation time?

Cambridge Lv

Hi,

I’m using Spectre in ADE L to run simulation. When setting ‘selected’ in ‘Select signals to output(save)’, it elapsed about 135 seconds. Setting ‘allpub’, it elapsed about 172 seconds. Of course, the larger the circuit is, the more time difference between them. 

Does it make sense? In my opinion, no matter which setting I choose, the simulation should cover the whole circuit, or just result from disk I/O?

Thanks!

  • Saloni Chhabra

    Hi,

    Yes, this is expected. The simulation is always running over the whole circuit, but when you choose to save more signals, simulator needs to write additional waveform points to disk (PSF database) which will take more time.

    Regards,

    Saloni 

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