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| Content Provider | ACM Digital Library |
|---|---|
| Author | Walker, David Ligatti, Jay Reis, George A. August, David I. Mackey, Lester |
| Abstract | A transient hardware fault occurs when an energetic particle strikes a transistor, causing it to change state. These faults do not cause permanent damage, but may result in incorrect program execution by altering signal transfers or stored values. While the likelihood that such transient faults will cause any significant damage may seem remote, over the last several years transient faults have caused costly failures in high-end machines at America Online, eBay, and the Los Alamos Neutron Science Center, among others [6, 44, 15]. Because susceptibility to transient faults is proportional to the size and density of transistors, the problem of transient faults will become increasingly important in the coming decades.This paper defines the first formal, type-theoretic framework for studying reliable computation in the presence of transient faults. More specifically, it defines λzap, a lambda calculus that exhibits intermittent data faults. In order to detect and recover from these faults, λzap programs replicate intermediate computations and use majority voting, thereby modeling software-based fault tolerance techniques studied extensively, but informally [10, 20, 30, 31, 32, 33, 41].To ensure that programs maintain the proper invariants and use λzap primitives correctly, the paper defines a type system for the language. This type system guarantees that well-typed programs can tolerate any single data fault. To demonstrate that λzap can serve as an idealized typed intermediate language, we define a type-preserving translation from a standard simply-typed lambda calculus into λzap. |
| Starting Page | 38 |
| Ending Page | 49 |
| Page Count | 12 |
| File Format | |
| ISBN | 1595933093 |
| DOI | 10.1145/1159803.1159809 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2006-09-17 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Typed intermediate languages Fault tolerance Transient hardware faults Type systems Lambda calculus Reliable computing Soft faults |
| Content Type | Text |
| Resource Type | Article |
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