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Spectre: How to get rid of spectre.ic and spectre.fc?

dontpanic

Hi! I am running batch simulations over a large extracted design, so I need to trim down the size of the results directories to the bare minimum. The spectre.ic and spectre.fc occupy almost 50MB each, so I want to avoid generating them, but I haven't been able to figure out how...

-In my transient sim setup, tab "State file" I removed the text "spectre.ic"  and "spectre.fc" in the fields "write" and "writefinal", respectively, but the simulator seems to ignore this.

-In the "enviroment" options I have checked "Save state (ss)" and "Recover (rec)" to "n", but this also doesn't seem to have any effect.

Any ideas on how to achieve this? I'm using spectre version 15.1.0.679.isr14 64bit.

Thanks and regards,

Jorge.

P.S. I also noticed that even though I made sure to have no outputs selected for saving/plotting, and my "save all" setup is as in shown below, a "tran.tran.tran.dat" is still generated in the results directory. When I check its contents with the Results Browser tool, I see that one voltage node of my circuit is still being saved. Is this a bug, or spectre must by all means save at least one circuit node?

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  • Andrew Beckett

    Jorge,

    However, if you're doing sweeps and corners (which I assumed you were), turning off the Save Netlists checkbox means that rather than having a full netlist directory per sweep point and corner (i.e. under the 1, 2, 3 directories within the Interactive.XX), you only have one.

    Are you running lots of separate "Interactive" runs? If so, why?

    In general this netlist directory has to be partially kept because of the need for the mapping data in the directory - otherwise plotting wouldn't work. In this case you don't care about that, but that's why in general there's no mechanism to completely remove the netlist dir unless you're not keeping the simulation directory.

    I wonder whether a simpler solution might not be to get your veriloga to write the file to one level higher (i.e. add "../" to the beginning of the path) and then delete the simulation data and netlist? I've not tested this...

    Andrew.

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  • Andrew Beckett

    Jorge,

    However, if you're doing sweeps and corners (which I assumed you were), turning off the Save Netlists checkbox means that rather than having a full netlist directory per sweep point and corner (i.e. under the 1, 2, 3 directories within the Interactive.XX), you only have one.

    Are you running lots of separate "Interactive" runs? If so, why?

    In general this netlist directory has to be partially kept because of the need for the mapping data in the directory - otherwise plotting wouldn't work. In this case you don't care about that, but that's why in general there's no mechanism to completely remove the netlist dir unless you're not keeping the simulation directory.

    I wonder whether a simpler solution might not be to get your veriloga to write the file to one level higher (i.e. add "../" to the beginning of the path) and then delete the simulation data and netlist? I've not tested this...

    Andrew.

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