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Architectural Vulnerability Factor (AVF) is the probability that a transient fault in a bit, gate, or transistor becomes a user-visible error. AVFs vary widely across time, applications, and bits. Usually AVFs averaged over time and across applications are used to compute the overall soft error rate of a processor. Average AVFs, however, cannot express the short-term vulnerability variations of a bit as they tend to settle down to a fixed value over time. To quantify the vulnerability of bits over short durations, the authors introduce the concept of Quantized AVF (Q-AVF). Q-AVF expresses the vulnerability of a bit to soft errors over short intervals of time.
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