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maximum net length getNetWireLength vs reportLengthViolation

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Hello,

I have a question regarding maximum net length reported by EDI.

When I use "getNetWireLength" the net length reported is the full length of the net (the sum of the length of the different pieces of metals of this net).

When I use "reportLengthViolation", the net length reported is the worst length between a driver and the farthest of its loads. For example if driver-D1 drives 2 loads load-L1 and load-L2, the tool will report the worst length between D1->L1 and D1->L2 but not the full length of the net as done by "getNetWireLength".

When a foundry gives a maximum net-length rule for a specific technology (for example 200um with TSMC28), what value do I have to consider? the one reported by getNetWireLength or the one reported by reportLengthViolation?

Thanks in advance for your help

Best Regards

Chris 


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