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Max point number in local optimization

manudupouy

Hi,

When I do a local optimization in virtuoso, it simulates only 11 points but I configured much more options in my variables. I would like to increase this number but I didn't find any option. Could you help me please?

Best regards,

Emmanuel

  • Andrew Beckett
    manudupouy said:
    Could you help me please?

    Not unless you provide more information. You didn't say which version of the tools you're using, which options you've specified for optimisation, what you're varying, what the goals are and so on (suggest you read the Forum Guidelines). You wouldn't expect the number of points to be anywhere near the number of sweep points (otherwise it would just be a sweep rather than an optimisation) but 11 sounds very low.

    I suspect contacting customer support would be the best option.

    Regards,

    Andrew.

  • manudupouy
    in reply to Andrew Beckett

    Hi Andrew,

    I am using Virtuoso v16.1.7-64b.500.15

    I am sweeping 2 variables that are voltages like this (0.6:0.001:1.2) and transistor width like this (1u:0.1u:5u).

    I know that number of points will not be the same as sweep points but I said that only to clarify that the optimization were not limited by this fact.

    I cannot work with the support as I am using CentOS. I would only like to know if it exist a hidden parameter to limit the number of simulated point in local optimization.

    Thanks,

    Emmanuel

  • manudupouy
    in reply to manudupouy

    I am sorry Andrew. You can close this subject.

    I think it is was stopping at 11 points because it didn't measured any improvement from initial point.

    I tried with another starting point, it simulated 20 points.

  • Andrew Beckett
    in reply to manudupouy

    No problem. Thanks for the clarification. I'm really glad you did that rather than the increasing situation recently where forum posters provide additional info or ask a followup question then later delete it - which is really annoying when I get to reviewing issues a few days later if I've been travelling (typically I spend some time thinking how to respond, get it clear in my head, only to find the post has vanished).

    BTW, just because you're using CentOS doesn't mean that you can't use support. If you're using an unsupported platform, it should only be an issue if you hit an issue that we fail to be able to reproduce on a supported platform, and to be honest, the platform rarely makes a difference (other than missing shared libraries). Don't let somebody fob you off with the unsupported platform without having done some reasonable investigation first (unless of course it clearly is a platform related issue).

    Regards,

    Andrew.

  • manudupouy
    in reply to Andrew Beckett

    OK, thanks for this advice.

    Regards,

    Emmanuel

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