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set_db cts_clustering_source_group_max_cloned_fraction 0.2

hammercui

Where could I get more introduction about the command "set_db cts_clustering_source_group_max_cloned_fraction 0.2" ?

Any thread will be appreciate 

Thanks

  • Hi,
    there is some information about this root attribute here, where its legacy counterpart clustering_source_group_max_cloned_fraction is described:
    Flexible H-tree and Multi-Tap Clock Flow in Innovus

    Check Page 30, "Multi-tap allocation cloning control":

    "The user can adjust the tradeoff between the increase in the number of clock gates from cloning, the need for which was discussed earlier, and the likely imbalance of insertion delay between taps. This is performed with the clustering_source_group_max_cloned_fraction property. The default setting is 0.2, which implies at most a 20% increase in the number of clock gates."

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