Are you suggesting that it worked prior t

Question

< Philipp Gühring> Are you suggesting that it worked prior to or some time prior to rev 8 3 368 I find it surprising because there should be no difference between reading commands off of the command line and reading commands out of a file The only think I can think of is that the separation of commands into separate lines is at issue when using `cat` Try putting all commands on one line separated by ` ` or on multiple lines separated by ` ` as magic interprets backslash newline as a line continuation Does that work

Tim Edwards · Answer

The above trick is what I do in Makefile recipes that invoke magic using ` lt lt EOL EOL`

Philipp Gühring · Answer

I think that I had it working somewhere before 8 3 368 but I am not 100 sure Could it be that the before or after the rcfile parsing something changes the state of magic I ll try to create a small reproducible example

Philipp Gühring · Answer

One problem could be that I generated the file with DRC errors but without lt lt checkpaint gt gt so magic thinks that the file is DRC clean

Philipp Gühring · Answer

<https pdk libresilicon com magicdrc zip> lt Just run the reproduce sh

Philipp Gühring · Answer

Perhaps a drc invalidate command would be nice that tells the DRC engine that it has to start fresh from scratch But the commands I am sending I don t like about the checkpaint that I have to give it a rectangle which has the risk that it might be too small

Tim Edwards · Answer

checkpaint should force the DRC engine to run as soon as you turn it on drc check should be the equivalent of your suggested drc invalidate it will invalidate DRC and re run all checks The commands you re using and their sequence appear to be correct The other possibility is that all these commands are non blocking although I thought that drc catchup is supposed to be blocking If so it might reach the end of the script and exit without waiting for the DRC to finish except that was what drc catchup is supposed to prevent That was what made me wonder if it s an issue of how the commands are passed to stdin

Philipp Gühring · Answer

I tried adding checkpaint now but it doesn t help I also reduced the tcl file now to this minimum load INV mag select top cell drc check drc catchup drc count total exit

Philipp Gühring · Answer

Yes it could be some race condition with the commands being passed in I think I remember having had the behaviour that it sometimes worked and it sometimes didn t

Philipp Gühring · Answer

The faster you pass in the commands in just one line likely the worse

Tim Edwards · Answer

This is a suggestion for debugging not a solution but try adding a line `after 1000` 1 second forced delay

Philipp Gühring · Answer

Still doesn t work load INV mag select top cell drc check after 10000 drc catchup drc count total exit

Philipp Gühring · Answer

even with 10 seconds

Philipp Gühring · Answer

It really delays for 10 seconds

Philipp Gühring · Answer

I have updated the <https pdk libresilicon com magicdrc zip> now with the minimized example for easier debugging

Philipp Gühring · Answer

It had taken me quite a long time to figure out that the behviour is different for rcfile and STDIN I have implemented the workaround with the rcfiles into my flow now so it s not urgent to get it fixed for me anymore