Head Maps Power Density 0.00 fW

[Baungarten-CINVESTAV]

Description

The OpenROAD -GUI Head Map Power DEnsity view shows 0.00 fW when loading .def and .lef files or when the .odb file is loaded

Expected Behavior

1. Hardening a module with the OpenLANE workflow
2. Loading .def and .lef files in OpenROAD GUI
3. Showing the power density of Head Map

Environment report

N/A

Reproduction material

user_proj_example.zip

Relevant log output

N/A

[vijayank88]

Can you check the log/report file, report_power it has?

[maliberty]

I'm guessing from:

that you haven't loaded the liberty files.

[Baungarten-CINVESTAV]

@vijayank88 and @maliberty thanks for your quick answer.

I'm running the OpenLANE flow with Caravel, and then i export the ".def" and ".lef" file in to "OpenROAD-flow-scripts".

With your answers i noticed two thinks first, the power report will be 0 W if the module its composed only for sub modules. Second as Matt says probably i haven't loaded the liberty files, i just import to OpenROAD the ".def" and ".lef" file.

I attached you two different files:

• Top module power report & OpenROAD Power Density view Power reports top module.zip

• Sub module power report & OpenROAD Power Density view

Sub Module Power report.zip

Now my question is how can i import those files ( liberty files) to OpenROAD-flow-scripts?

[vijayank88]

@Baungarten-CINVESTAV Seems you're using 2 months old OpenLane/OpenROAD commit. Update your OpenLane to latest and run the flow. Power density information loaded with .odb file to view in gui. Nothing can be done with .rpt file. Load .odb and check the results.

[Baungarten-CINVESTAV]

I installed the newest version of OpenROAD & OpenLANE, then i ran the PPU OpenLANE example, and finally i exported opened the ".odb" with OpenROAD -GUI and i had the same result.

What could be the problem?

[vijayank88]

@Baungarten-CINVESTAV Follow below steps to view power density in OpenROAD GUI

% openroad
> read_liberty <path to>/sky130B/libs.ref/sky130_fd_sc_hd/lib/sky130_fd_sc_hd__tt_025C_1v80.lib
>read_db <path to>/routing/PPU.odb
>gui::show

From Heat Maps > Power Density menu you can view expected results.

[Baungarten-CINVESTAV]

Thanks, it works for OpenLANE direct workflow.

Maybe this is not the right issues but do you know why when I load a ".odb" file from caravel it still shows up with 0 fW, could it be the version of OpenLANE that Caravel uses?

[vijayank88]

Have you load the .lib file?

[Baungarten-CINVESTAV]

Yes, I followed the same steps

openroad
OpenROAD v2.0-7480-g8a4065b09 
This program is licensed under the BSD-3 license. See the LICENSE file for details.
Components of this program may be licensed under more restrictive licenses which must be honored.
openroad> read_liberty sky130A/libs.ref/sky130_fd_sc_hd/lib/sky130_fd_sc_hd__tt_025C_1v80.lib
1
openroad> read_db user_project_wrapper.odb
openroad> gui::show

[Baungarten-CINVESTAV]

well, just now i tried to see the power map of a sub-module, and it works. so i think the problem is when we see the power map of the core module.

[kareefardi]

@Baungarten-CINVESTAV Please open a new issue if needed. I tried viewing PPU using the above instructions it worked.