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Net Tracing - Skill

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Hello All ,

I have a script which I use to calculate a particular net's  Net Length, total net resistance, Capacitance (w.r.t ground).
But the drawback is that I have to select the entire Net before invoking the "NetLength" Function.

So I want a script which can trace the entire net and give a list of metals, vias, instances that
belong to this net. i.e I will select any one metal/instance/via  of a net and the code should trace the entire net and give me the desired o/p.

NOTE: Instances here refer to instances/mosaics of vias.

Thanks,
Sathya


Originally posted in cdnusers.org by rimser9
Parents

  • Derek,

    I have written a similar tracing function, but I find the "Mark Net" function to be dramatically faster. dbGetTrueOverlaps has to be one of the most powerful functions in SKILL, but at the same time, it has to be the slowest.

    I'm curious if you can share any tips or thoughts on the performance aspects of this problem.

    For me, "Mark Net" is too fast to compete with it in SKILL for displaying purposes (compare tracing VSS! in a real chip). But, if you want the list of shapes for post-processing, like in Sathya's case, I think you need a SKILL function, like the one you have written. Therefore, the problem cannot be entirely bypassed by using "Mark Net", unless you only need to display the shapes.

    Thanks!


    Originally posted in cdnusers.org by m27315
Reply

  • Derek,

    I have written a similar tracing function, but I find the "Mark Net" function to be dramatically faster. dbGetTrueOverlaps has to be one of the most powerful functions in SKILL, but at the same time, it has to be the slowest.

    I'm curious if you can share any tips or thoughts on the performance aspects of this problem.

    For me, "Mark Net" is too fast to compete with it in SKILL for displaying purposes (compare tracing VSS! in a real chip). But, if you want the list of shapes for post-processing, like in Sathya's case, I think you need a SKILL function, like the one you have written. Therefore, the problem cannot be entirely bypassed by using "Mark Net", unless you only need to display the shapes.

    Thanks!


    Originally posted in cdnusers.org by m27315
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