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Automating manual frontend: discussion on loss of precision vs. automating

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Théophile Bastian 2024-04-20 17:08:40 +02:00
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manuscrit/40_A72-frontend/30_manual_frontend.tex
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@ -550,3 +550,12 @@ between processors' frontends. A comparative study of their respective
importance to accurately model frontends, and ways to circumvent their impact
on the measure of $\cycF{\kerK}$ to count \uops{} per instruction would also be
needed.
Such fully-automated methods would probably be unable to account for
``unusual'' frontend bottlenecks ---~at least not at the level of detail that
\eg{} \uica{} authors gather for Intel frontends~\cite{uica}. This level of
detail, however, is possible exactly because the authors' restricted their
scope to microarchitectures that share a lot of similarity, coming from the
same manufacturer. Assessing extent of the loss of precision of an
automatically-generated model, and its gain of precision \wrt{} a model without
frontend, remains to be done.