markdown/gh_discussions/Runtime/2888.md

Using deltaDebug.py to whittle down detailed routing example

Tool: Detailed Routing

Subcategory: Detailed routing issue

Conversation

oharboe

I have some violations that detailed routing isn't able to deal with, that I really think it should be able to deal with.

Normally, deltaDebug.py needs an error message to look for to do it's bisection.

However, a detailed route can succeed after 64 iterations, even if all violations are not sorted out, so there's no error message for deltaDebug.py to use for it's bisection.

Tips?

maliberty

Can you use --use_stdout & --error_string to check the final drcs?

maliberty

You could make a temporary change to scripts/detail_route.tcl to call detailed_route_num_drvs and issue an error message if >0. Then you could delta on that.

oharboe

Various bugs have been fixed and improvements made to deltaDebug.py since this post.