What are TNS, WNS, THS, NVP and WHS

Description

After running report_timing or report_timing_summary commands, I noticed the WNS, TNS, WHS, and THS.  What are WNS, TNS, WHS, NVP and THS?

Solution

WNS = Worst Negative Slack

TNS = Total Negative Slack = sum of the negative slack paths = 是所有小于0的violation的值的和

WHS = Worst Hold Slack

NVP = Number of Violating Paths

THS = Total Hold Slack = sum of the negative hold slack paths

These values inform you how much the design is missing the timing requirements

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