LVS mismatch for some sky130 example SRAMs
Describe the bug When compiling some ("sky130_sram_1rw_tiny", "sky130_sram_1kbyte_1rw_32x256_8", maybe others too) sky130 example srams from the "macros/sram_configs" subfolder, an LVS mismatch occurs.
Version tag v1.2.45, commit fc37bf685991b9c9281b6d2fba6376ab0afc5231
To Reproduce
- Install tools through conda and PDKs using the provided scripts ("install_conda.sh", "make pdk", "make install")
cd macros && make sky130_sram_1rw_tiny.ok
Expected behavior Expect the LVS to conclude without mismatches, just like it works with other example configurations.
Logs
...
[2023-12-27 17:19:46.675595] [openram.verify.magic/run_lvs]: Cell pin lists for sky130_sram_1rw_tiny and sky130_sram_1rw_tiny altered to match.
[2023-12-27 17:19:46.676333] [openram.verify.magic/run_lvs]: Device classes sky130_sram_1rw_tiny and sky130_sram_1rw_tiny are equivalent.
[2023-12-27 17:19:46.677174] [openram.verify.magic/run_lvs]:
[2023-12-27 17:19:46.677948] [openram.verify.magic/run_lvs]: Final result: Top level cell failed pin matching.
[2023-12-27 17:19:46.678774] ERROR: file magic.py: line 385: sky130_sram_1rw_tiny LVS mismatch (results in /user/projekt_abc/OpenRAM/macros/sky130_sram_1rw_tiny/tmp/sky130_sram_1rw_tiny.lvs.report)
I have the same problem in the latest stable version. When using the sky130 technology to generate sky130_sram_1rw_tiny, I got LVS mismatch reported as
Circuit 1 contains 1792 devices, Circuit 2 contains 1783 devices. *** MISMATCH ***
Circuit 1 contains 658 nets, Circuit 2 contains 658 nets.
in .lvs.out and
NET mismatches: Class fragments follow (with fanout counts):
Circuit 1: sky130_sram_1rw_tiny_sky130_col_cap_array_0 |Circuit 2: sky130_sram_1rw_tiny_sky130_col_cap_array_0
DEVICE mismatches: Class fragments follow (with node fanout counts):
Circuit 1: sky130_sram_1rw_tiny_sky130_col_cap_array |Circuit 2: sky130_sram_1rw_tiny_sky130_col_cap_array
DEVICE mismatches: Class fragments follow (with node fanout counts):
Circuit 1: sky130_sram_1rw_tiny_sky130_replica_column |Circuit 2: sky130_sram_1rw_tiny_sky130_replica_column
...
in .lvs.report How can I fix this bug?
I met the same problem, how did you solve it in the end?
I haven't found a way to fix it yet.
@jcirimel is yours passing?