Real-time Linux for US Navy weapons systems gets an upgrade
Yesterday, a supplier of Linux for driving time critical applications -- such as intercepting ballistic missiles -- released RedHawk Linux 5.1, its latest "real-time" operating system distribution.
Concurrent is a Linux distributor specializing in real-time technologies that can be utilized by some very serious businesses. For example, Concurrent is the key supplier of RedHawk Linux for the US Navy's Aegis cruisers, which are equipped with anti-air, anti-surface, and anti-submarine weapons systems.
The company's trademark architecture relies on the presence of multiple processors, and the ability to schedule threading between CPUs and cores to ensure higher reliability for user tasks, as opposed to hardware-specific tasks. One way it does this is through a mechanism Concurrent calls processor shielding, which grants higher priorities to selected cores that run user applications...such as anti-submarine algorithmic operations.
"When the worst-case time measured for either executing a code segment or response to an interrupt is significantly different than the typical case, the application's performance is said to be experiencing jitter."
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