Can these warnings be removed?

[oharboe]

I've found myself ignoring warnings when I shouldn't...

In that regard, it would be helpful to fix some warnings that are always there, so I pay more attention...

Can these be fixed?

[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13178, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13211, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13244, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13277, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13310, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13343, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 13376, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 14772, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 14805, timing group from output port.
[WARNING STA-0164] /OpenROAD-flow-scripts/flow/platforms/asap7/lib/asap7sc7p5t_SIMPLE_RVT_TT_nldm_211120.lib.gz line 14838, timing group from output port.

[rovinski]

They cannot, the warnings are due to the structure of the cells in the PDK and the way they were characterized into a timing model. You can, however, stop the warnings from showing up by using suppress_message STA 164.

[vijayank88]

I have discussed about this WARNING STA-016 month back with Tom. Replied:

The output to output timing edges in the liberty cause this warning.
If it's just this one cell, you could add it to the don't use list. 
I think this warning means the timing will be less accurate.
If you are doing experiments it may also be safe to ignore.

[vijayank88]

@oharboe Add following lines in the read_liberty.tcl beginning of the file. It will remove that warnings from the log.

if {[info exists ::env(PLATFORM)] && $::env(PLATFORM) == "asap7"} {
   suppress_message STA 164
}

[oharboe]

Thanks! Though what I'm wondering is if there is a best choice that be made on behalf of everyone using ORFS, so that this warning can be silenced in master.

I'm also concerned that the above suppresses other messages that I should investigate.

[vijayank88]

Ok. I will make a PR.

[vijayank88]

Thanks! Though what I'm wondering is if there is a best choice that be made on behalf of everyone using ORFS, so that this warning can be silenced in master.

I'm also concerned that the above suppresses other messages that I should investigate.

That is why I restricted only to ASAP7 platform.

[vijayank88]

PR created: The-OpenROAD-Project/OpenROAD-flow-scripts#1056