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The script used is simple without specific options:
The density of the design is 62% before detailed_route but there are a lot of violations and routing does not converge
It does not get any better after 16th iteration
With Innovus the density is 64% before starting routing. Routing converges pretty quickly:
So I guess there is a problem somewhere. I don't know where to look at. Does anyone have an idea? Some global GRT log:
TIA |
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Replies: 5 comments 10 replies
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Congestion report after global route in Innovus:
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We do write the drcs out to a file where they can be reloaded in the GUI. I suggest loading them and see if you can detect any pattern or common themes. Its hard to say much from this level of detail. |
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In your description "The script used is simple without specific options..." has no call to pdngen. You say you are using pdngen. One of these is not correct. |
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Its pretty hard to debug these issues without a test case. If you have a support contract with Precision Innovations then we could setup an NDA and exchange data. |
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Btw, I forgot to mention that the input netlist comes from our design synthesized with Yosys. |
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Btw, I forgot to mention that the input netlist comes from our design synthesized with Yosys.
The design routes now as mentioned in #7938.
I'll try with the netlist from DC. Marking answered.