Backward-Latent Erratum
ConceptA backward-latent erratum is a microprocessor erratum that is reported in a given design strictly before being reported again in an earlier design, i.e., a defect first surfaced publicly on a newer product and then later re-appeared in an errata document for an older product. The concept is introduced in the RemembERR paper (USENIX MICRO 2022) as the temporal counterpart to forward-latent errata and is analyzed alongside them to study how bugs propagate across CPU generations.
WIKI
Backward-Latent Erratum
Definition
A backward-latent erratum is an erratum that was reported in a design strictly before being reported in an earlier design. Formally, it is the temporal dual of a forward-latent erratum:
- Forward-latent erratum — reported in one design and later reported in a later design.
- Backward-latent erratum — reported in a design and later reported in an earlier design.
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