Using the -timing_summary Option - 2024.1 English

Vivado Design Suite User Guide: Implementation (UG904)

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2024.1 English

After placement, an estimated timing summary is output to the log file. By default, the number reflects the internal estimates of the placer. For example:

INFO: [Place 30-746] Post Placement Timing Summary WNS=0.022. For the most accurate timing information please run report_timing.

For greater accuracy at the expense of slightly longer run time, you can use the -timing_summary option to force the placer to report the timing summary based on the results from the static timing engine.

INFO: [Place 30-100] Post Placement Timing Summary | WNS=0.236 | TNS=0.000 |


  • WNS = Worst Negative Slack
  • TNS = Total Negative Slack