Signaling an interrupt request through daisy chained devices
US7752353B2 · kind B2 · utility
4Cited by
10References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Jan 6, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and a method for asynchronously signaling interrupts from a plurality of devices in a computing system, while optimizing the latencies in handling the interrupts. In a particular embodiment, an interrupt is signaled via a plurality of daisy chained devices by handing over the interrupt request from one device to another while retaining information regarding any interrupts handed over (also referred to as passed). In this way, the interrupt source can be readily identified (using a binary search, for example) thereby reducing interrupt latency and memory resources required to retain interrupt history.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.