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Max tran violations

diablo

Pls suggest on improving max tran violations in SocEncounterafter after routing. After postCTS, there are no violations on setup, hold, max_tran, max_fanout. However, after post route, I can see around 100 of max_tran violations but there is still no setup and hold violations. After iteratively running  optDesign -postRoute -drv, i still get those violations. I was wondering why the tool is not using buffers to fix it. 

Parents

  • Thanks Scrivner. I used the -verbose true options and it is excluding clock nets from optimizing. *info: Start fixing DRV iteration 1 ...
    *** Starting dpFixDRCViolation (383.5M)
    *info: 4 don't touch nets excluded
    *info: 17 io nets excluded
    *info: 264 clock nets excluded
    *info: 490 violations may not be fixable:
    *info:     490 violations on clock net (remark C).

    Why is the tool ignoring clock net from optimizing? Thanks again for your quick and helpful response. 

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  • Thanks Scrivner. I used the -verbose true options and it is excluding clock nets from optimizing. *info: Start fixing DRV iteration 1 ...
    *** Starting dpFixDRCViolation (383.5M)
    *info: 4 don't touch nets excluded
    *info: 17 io nets excluded
    *info: 264 clock nets excluded
    *info: 490 violations may not be fixable:
    *info:     490 violations on clock net (remark C).

    Why is the tool ignoring clock net from optimizing? Thanks again for your quick and helpful response. 

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