Guardring flow fails on master

ALIGN-analoglayout / ALIGN-public

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Guardring flow fails on master #850

Closed soneryaldiz closed 2 years ago

soneryaldiz commented 2 years ago

Flow fails on telescopic_ota_guard_ring due to a seg fault. To reproduce:

pytest --runnightly -k telescopic_ota_guard_ring --log-cli-level DEBUG -v -s

align.pnr.toplevel INFO : Running guardring flow
INFO     align.pnr.toplevel:toplevel.py:327 Running guardring flow
Fatal Python error: Segmentation fault

fyi, @854768750 , @srini229 .

srini229 commented 2 years ago

@soneryaldiz The failure is because of absence of any pins on the guard ring in the left file generated by the primitive generator. I discussed with @arvuce22 and checked in a fix to the branch fix/guard_ring. It has a DRC now which requires fix in the power net router. The location of the issue is a via pad in the lower left of the layout shown in the figure below: tele_ota

arvuce22 commented 2 years ago

@Lastdayends There is a minimum length DRC for M1 in "telescopic_ota_guard_ring" testcase. Could you please check it in the following branch #862 (https://github.com/ALIGN-analoglayout/ALIGN-public/tree/bug/guard_ring_flow)

Lastdayends commented 2 years ago

@arvuce22 @soneryaldiz

This should not be a minimum length error. As this M1 is touching its pins in the guard ring. Its pin is a big rectangle.

The error reported in the intel checker should be wrong, as the guard ring is missing in the *.json file.

soneryaldiz commented 2 years ago

Closing this issue as it is not considered critical.