XXXX 1 pin not visited, fall back to feedthrough mode

[faisaladilquadery]

I have been facing these warnings for some designs I synthesized with genus and implemented in OpenRoad. These warnings are showing up during detailed routing. What to these warnings actually indicate ?

[maliberty]

It means the route guides from global routing don't cover all the pins of the net and drt is trying to fix them up. A test case would be helpful if you can provide one (in which case open an issue).

[faisaladilquadery]

Hi @maliberty thanks for the reply.
Can you please guide me in how to provide a test case, then I will open a Issue.
and can u deduce any particular reason global routing isnt covering all the pins and nets ?

[maliberty]

If you are using ORFS then 'make global_route_issue' should package a test case.

[gkamendje]

I am seeing the same issue [WARNING DRT-0225] clknet_1_0__leaf_i_sys_clk 6 pin not visited, fall back to feedthrough mode.. Here is a test case that can be used to reproduce. https://drive.google.com/file/d/11OVLyyswdMCozIKECvxi08zB2f4SSwNG/view?usp=share_link

[maliberty]

@eder-matheus please take a look