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Regarding Save/Restore Settings for Transient Simulation

Kiel76

Hello,

I am running a transient simulation on my circuit and usually my simulation time took me more than a day (The circuit is quite big). I am usually saving specific nodes to decrease the simulation time. My problem is, since it usually took me one day to finish I need to save my trans simulation just in case something bad happens. I am aware that the transient simulation have the options for save/restore. But, when I tried to use it I have some problem. Whenever I restore the save file, it starts where it ends before (expected function) but my data is incomplete. It doesn't save the previous data. Its kind of my data is incomplete. What I did is set the saveperiod and savefile. I hope someone can help me. Thank you!


Regards,

Kiel

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  • Dear Kiel,

    In my experience, the save/restore function will save the state of the simulation at a particular time or event in a simulation in order that the simulation can be restarted fromY that time or event. It will not “restore” simulation data prior to that time or event. Presumably, if you are restarting a simulation due to some crash or error, you may have access to the prior simulation data.

    Shawn 

  • in reply to ShawnLogan

    Oh! Thank you for that clarification. I just want to check if my understanding is right, does it mean that the save/restore function does not save the data but instead the specific time only?
    Also, what do you mean by "access to the prior simulation data"?

    Thank you for your immediate response and I would like to apologize for many questions. It is my first time using cadence.

    Kiel.

  • in reply to Kiel76

    Dear Keil76,

    Kiel76 said:
    I just want to check if my understanding is right, does it mean that the save/restore function does not save the data but instead the specific time only?

    Spectre saves the circuit state at the time or event you specify in the "Reuse" tab of the simulation. It will not save all the simulation data prior to that time or event.

    Kiel76 said:
    Also, what do you mean by "access to the prior simulation data"?

    Presumably, you are trying to start from the restart file due to something that caused your simulation to prematurely exit. Hence, you should have access to the data from the simulation when spectre exited prematurely (i.e. the "prior simulation data").

    Shawn

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  • in reply to Kiel76

    Dear Keil76,

    Kiel76 said:
    I just want to check if my understanding is right, does it mean that the save/restore function does not save the data but instead the specific time only?

    Spectre saves the circuit state at the time or event you specify in the "Reuse" tab of the simulation. It will not save all the simulation data prior to that time or event.

    Kiel76 said:
    Also, what do you mean by "access to the prior simulation data"?

    Presumably, you are trying to start from the restart file due to something that caused your simulation to prematurely exit. Hence, you should have access to the data from the simulation when spectre exited prematurely (i.e. the "prior simulation data").

    Shawn

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