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move analyze_power_grid to the end of the flow #1247

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maliberty opened this issue Aug 2, 2022 · 0 comments · Fixed by #1255
Closed

move analyze_power_grid to the end of the flow #1247

maliberty opened this issue Aug 2, 2022 · 0 comments · Fixed by #1255
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enhancement New feature or request

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@maliberty
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Description

analyze_power_grid should be called at the end of the flow. Currently it is called in pdn.tcl when no instances have been placed and generates meaningless results.

Environment

Latest version

Reproduction Material

Run any design, e.g. 'make test'

Expected behavior

A meaningful IR drop report

Logs

from 'make test'

[WARNING PSM-0071] Instance _506_ is not placed. Therefore, the power drawn by this instance is not considered for IR  drop estimation. Please run analyze_power_grid after instances are placed.
[INFO PSM-0064] Number of voltage sources = 1.
[INFO PSM-0040] All PDN stripes on net VPWR are connected.
########## IR report #################
Worstcase voltage: 1.80e+00 V
Average IR drop  : 1.04e-10 V
Worstcase IR drop: 2.59e-10 V
######################################
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enhancement New feature or request
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IR Drop Reports in the Signoff Stage donn/openlane
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@maliberty @donn