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Question About SetOptMode, Bob, are you there?

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hi bob, I got one question about setOptMode.

Last night, I type getOptMode command, I find the options:

-congOpt
-rebuffer
-incrTrialRoute

They are the hidden options for setOptMode, I want to know what their functions are, what command do they control, since optDesign is just a large tcl wrapper.

Thanks, Bob!


Originally posted in cdnusers.org by eminemshow
Parents

  • Hi eminemshow,

    Options like these are typically undocumented because they're in the process of being qualified for future release. getOptMode should not be revealing their presence, so it is unintentional that the tool exposed these internals to you. I can understand why you might be curious about what they do as you of course want to use the latest and greatest capabilities in the tool to meet timing on your designs.

    It sounds like you're using tool version 6.2 or earlier perhaps? In the case of congOpt, it became a documented option in the 7.1 release (it enables an attempt to relieve local congestion during optimization). In the case of rebuffer, it became the default without having an explicit switch to enable it, and the incrTrialRoute option is now obsolete- it never applied to the optDesign command itself (it applied to internal optimization commands).

    Perhaps you could share what challenges you're facing with timing optimization in general and we could make a recommendation that leveraged documented options to achieve your goals?

    Thanks,
    Bob


    Originally posted in cdnusers.org by BobD
Reply

  • Hi eminemshow,

    Options like these are typically undocumented because they're in the process of being qualified for future release. getOptMode should not be revealing their presence, so it is unintentional that the tool exposed these internals to you. I can understand why you might be curious about what they do as you of course want to use the latest and greatest capabilities in the tool to meet timing on your designs.

    It sounds like you're using tool version 6.2 or earlier perhaps? In the case of congOpt, it became a documented option in the 7.1 release (it enables an attempt to relieve local congestion during optimization). In the case of rebuffer, it became the default without having an explicit switch to enable it, and the incrTrialRoute option is now obsolete- it never applied to the optDesign command itself (it applied to internal optimization commands).

    Perhaps you could share what challenges you're facing with timing optimization in general and we could make a recommendation that leveraged documented options to achieve your goals?

    Thanks,
    Bob


    Originally posted in cdnusers.org by BobD
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