[Libre-soc-bugs] [Bug 199] Layout using coriolis2 main core, 180nm

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Wed Sep 30 21:44:07 BST 2020


--- Comment #95 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jean-Paul.Chaput from comment #94)

>   No no. 7 unrouted segments (4 Verticals, 3 Horizontals),
>   7075 is the cumulated length of those segments, that is
>   7075 lambdas.

ahh :)

> > could the introduction of a clock tree (USE_CLOCKTREE=yes in Makefile)
> > have an effect?
>   Yes... The H-Tree consume more routing resources than a "default"
>   routing. Nevertheless, it is not that much saturated as show the
>   global routing which converge in 2 iterations only.


>     That will be fixed after the HFNS, because the HFNS will also
>   increase the problem.


in the meantime increased chip.core to 27000x27000 there is only 1 segment
unrouted.  trying 27500x27500 now.

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