Anton Blanchard

I noticed a couple of magic processes were taking quite a while to complete. Not sure if it is the same issue @donn is seeing, but a profile shows: ```...

A wild guess, but we did add a call to `DBFullResidueMask` in `lefWriteMacro` in https://github.com/RTimothyEdwards/magic/commit/ee1d1ae5b0219c272edd4775dccaa3e39647f381

The slow magic process is called from 'make io-A' and when I strace it, it is writing out incredibly slowly (1 write every second): ``` 22:29:14.845929 write(4, "END\n PORT\n LAYER...

I used @jjcherry56 scripts from ORFS to recalculate the layer capacitance estimates (in pF/micron of wire length). The calculated estimates are about 3x bigger than the LAYER_RC values we were...

https://docs.google.com/spreadsheets/d/1N9To-xTiA7FLfQ1SNzWKe-wMckFEXVE9WPkPPjYkaxE/edit#gid=226894802 I'm not sure if this sky130 data is accurate, but it suggests to me a (worst case) min width (0.14), min spacing (0.14) wire has a total capacitance of...

> Is there somewhere I can find documentation on what the numbers are in the OpenRCX input tables? It was linked from https://skywater-pdk.readthedocs.io/en/main/rules/rcx.html#capacitance-values . Perhaps @mithro knows where it came...

I reran the same test with the recent RCX updates in open_pdks: ``` Startpoint: _617_ (rising edge-triggered flip-flop clocked by clk) Endpoint: _357_ (rising edge-triggered flip-flop clocked by clk) Path...

I also made an attempt to match the TLEF capacitance values to the SPEF results. Taking the TLEF data and converting it to fF/um for a min width wire, I...

I agree with @maliberty. The open issue is that we now have 3 sets of RCX data, and it sounds like only the OpenROAD RCX data has been correlated to...

ORFS, RCX calculated from magic (which I think was the 3x delta) and current Openlane (which doesn't match ORFS), at least with my testing.