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Developing and maintaining indus-trywide standards for lifetime reliability is a

Summary: 70
Developing and maintaining indus-
trywide standards for lifetime reliability is a
critical task for all microprocessor manufac-
turers. Although technology scaling contin-
ues to provide significant performance
benefits, increasingly smaller feature sizes and
increasing power densities are accelerating the
onset of wearout-based failures, thus shorten-
ing processor life.1
Microarchitects have traditionally treated
processor lifetime reliability as a manufactur-
ing problem, best left to device and process
engineers. In current processors, manufactur-
ers enforce lifetime reliability, or qualify it,
during device design, circuit layout, manu-
facture, and chip test. This reliability qualifi-
cation, which is application-oblivious, is based
on estimates of worst case temperature and
processor utilization. However, most applica-


Source: Adve, Sarita - Department of Computer Science, University of Illinois at Urbana-Champaign


Collections: Computer Technologies and Information Sciences