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Investigate long path in soc/litex/base with xc7a100t: 1200+ length #1560

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tcal-x opened this issue Jun 30, 2020 · 2 comments
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Investigate long path in soc/litex/base with xc7a100t: 1200+ length #1560

tcal-x opened this issue Jun 30, 2020 · 2 comments

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@tcal-x
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tcal-x commented Jun 30, 2020

Follow-on to issue #1546 .

Directory build/xc/xc7/tests/soc/litex/base, target baselitex_arty100t_vivado_diff_fasm.

During fasm2bels, the make_routes.py crashed because the path length exceeded the recursion limit of 1000. The path length was somewhere between 1200 and 1250. This will be fixed by increasing the maximum recursion limit.

But why is such a long path needed when the part grid is 90x200? Perhaps we should dump source/sink info from make_routes.py for such long paths.
@litghost
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I don't believe we've seen this happen again for a while? Close for now?

@tcal-x
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tcal-x commented Oct 29, 2020

Correct, we weren't able to reproduce it since other things had moved ahead.

@tcal-x tcal-x closed this as completed Oct 29, 2020
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