[libre-riscv-dev] [Bug 71] replace SetAssocCache PLRU with random selection (LFSR)

[bugzilla-daemon at libre-riscv.org]

http://bugs.libre-riscv.org/show_bug.cgi?id=71

--- Comment #8 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Daniel Benusovich from comment #7)
> I saw that there is a plru or lfsr option which is kind of neat. Should we
> remove the plru entirely? The ticket leads me to believe the extermination
> of the plru is the only way forward haha.

:) i honestly don't know the answer to that one, the nice thing is, if
it's not activated it won't do any harm or add any gates.

just because i'm curious, i'd actually like to *see* the gates increase
that results, and a unit test to output some hit/miss statistics for both
algorithms.

much of this project is not just about "getting it done", it's about
making the processor a significant long-term educational resource.

we want people to instead of having a tablet or phone or laptop and
feeling totally disempowered about their device, to go, "moo? i'm running
a device where i can actually see how it works at the hardware level??
moo? awesome!"

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