Synthesis Log - 2025.2 English - UG906

Vivado Design Suite User Guide: Design Analysis and Closure Techniques (UG906)

Document ID
UG906
Release Date
2025-12-10
Version
2025.2 English

The Vivado synthesis log is the primary output from the synthesis tool. It includes details such as:

  • Files processed:
    • VHDL
    • Verilog
    • System Verilog
    • XDC
  • Parameter settings per cell
  • Nets with multiple drivers
  • Undriven hierarchical pins
  • Optimization information
  • Black boxes
  • Final primitive count
  • Cell usage by hierarchy
  • Runtime and memory usage
    Important: Review this log or the Messages tab for errors, critical warnings, and warnings. The synthesis tool can issue messages that cause serious issues later. Address them early to avoid downstream problems.