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Skip IR drop report in P&R config#30

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robtaylor merged 1 commit intomainfrom
fix/skip-irdrop-report
Feb 25, 2026
Merged

Skip IR drop report in P&R config#30
robtaylor merged 1 commit intomainfrom
fix/skip-irdrop-report

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Summary

  • P&R now completes routing successfully but fails at the IR drop analysis step
  • [PSM-0069] Check connectivity failed on VPWR — SRAM power pins not fully reachable via PDN straps
  • Added RUN_IRDROP_REPORT: false since we only need the netlist for simulation, not manufacturing-quality power analysis

Context

Run 22388795277 completed routing in ~95 minutes but failed at the final OpenROAD.IRDropReport step. The PDN macro connections (PR #29) resolved the earlier "disconnected pins" error, but the physical PDN strap geometry doesn't fully reach all SRAM power pins for the PSM connectivity check.

For simulation test data, the post-P&R netlist (which is generated before IR drop analysis) is all we need.

The IR drop analysis (PSM) fails with PSM-0069 "Check connectivity
failed on VPWR" due to SRAM macro power pins not being fully reachable
via PDN straps. Since we only need the post-P&R netlist for simulation
(not manufacturing), disable the IR drop check to allow the flow to
complete.

Co-developed-by: Claude Code v2.1.44 (claude-opus-4-6)
@robtaylor robtaylor merged commit d47dec2 into main Feb 25, 2026
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@robtaylor robtaylor deleted the fix/skip-irdrop-report branch February 25, 2026 12:46
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