lockstep processor techniqueA processor lockstep is a technique used to achieve high reliability in a microprocessor system. This is done by adding a second identical processor to a system that monitors and verifies the operation of the system processor.
* The two processors are initialized to the same state during system start-up, and they receive the same inputs (code, bus operations and asynchronous events), so during normal operation the state of the two processors is identical from clock to clock. They are said to be operating in lockstep. The lockstep technique assumes that an error in either processor will cause a difference between the states of the two processors, which will eventually be manifested as a difference in the outputs, so the lockstep system monitors the outputs of the two processors and flags an error in the case of a discrepancy. [* Adapted from IBM PowerPC Tips]
IT Solutions Builder TOP IT RESOURCES TO MOVE YOUR BUSINESS FORWARD
Which topic are you interested in?
What is your company size?
What is your job title?
What is your job function?
Searching our resource database to find your matches...
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
The following facts and statistics capture the changing landscape of cloud computing and how service providers and customers are keeping up with... Read More »SEO Dictionary
From keyword analysis to backlinks and Google search engine algorithm updates, our search engine optimization glossary lists 85 SEO terms you need... Read More »Texting & Chat Abbreviations
From A3 to ZZZ this guide lists 1,500 text message and online chat abbreviations to help you translate and understand today's texting lingo. Read More »
Java is a high-level programming language. This guide describes the basics of Java, providing an overview of syntax, variables, data types and... Read More »Java Basics, Part 2
This second Study Guide describes the basics of Java, providing an overview of operators, modifiers and control Structures. Read More »Network Fundamentals Study Guide
Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »