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VLSIDA / OpenRAM

An open-source static random access memory (SRAM) compiler.
http://www.openram.org
BSD 3-Clause "New" or "Revised" License
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LVS Errors with Sky130 SRAMs #141

Closed BYCakar closed 2 years ago

BYCakar commented 2 years ago

Hi, I tried to verify some SRAM macros, but I get an LVS error. I examined what the problem comes from and I think the reason is that one of the files are missing. In sky130_sram_lvsdrc_test.lvs.out file, I get these messages:

Reading netlist file sky130_sram_lvsdrc_test.spice
Reading netlist file sky130_sram_lvsdrc_test.sp
...
Contents of circuit 1:  Circuit: 'sky130_sram_lvsdrc_test'
Circuit sky130_sram_lvsdrc_test contains 0 device instances.
Circuit contains 0 nets.
Contents of circuit 2:  Circuit: 'sky130_sram_lvsdrc_test'
Circuit sky130_sram_lvsdrc_test contains 4346 device instances.
  Class: sky130_fd_pr__nfet_01v8 instances: 742
  Class: sky130_fd_pr__special_pfet_pass instances: 648
  Class: sky130_fd_pr__special_nfet_latch instances: 2160
  Class: sky130_fd_pr__pfet_01v8 instances: 796
Circuit contains 1189 nets.

It tries to read sky130_sram_lvsdrc_test.spice, but there is no such file.

I added all the output files in the tarball, including lvs outputs and configuration file, so you can reproduce them.

[openram_logs_and_config.tar.gz](https://github.com/VLSIDA/OpenRAM/files/8630388/openram_logs_and_config.tar.gz)
mguthaus commented 2 years ago

This is very sensitive to the version of Magic and Netgen. There were some bugs with substrate extraction that have evolved over time. I'm going to defer on this until I push the new version any day now which will have a docker image with versions that work.

BYCakar commented 2 years ago

I need to verify my designs, how can I deal with this? Working magic and netgen versions could be helpful maybe. I am using OpenRAM with version v1.1.19.

mguthaus commented 2 years ago

I pushed the versions in our Dockerfile that can solve this issue. They are in the dev branch now.