RT is the advanced kernel of ChibiOS, it is designed to be a state of the art RTOS for deeply embedded applications. The design guidelines have been:
See the RT vs NIL article for a full list of the RT features.
In addition to the common RTOS features RT implements a set of unique features that make it one of the most advanced RTOS available:
|Real Tick-less Mode||The kernel does not require a system tick, interrupts are generated only at the scheduled time. This is optimal for implementing advanced power management modes.|
|High Resolution Time||The time resolution can reach sub-microseconds values. It is possible to use very small delays in tasks.|
|Full Thread Paradigm||The paradigm of threads is fully implemented: Create, Exit, Join operations are available. Most other RTOSes implement just “tasks”.|
|Cycle-Accurate Statistics||Critical zones, ISRs, tasks execution times are measured with a clock-accurate resolution, best/last/worst execution time is reported for all critical code paths.|
|System State Checker||The API call protocol is checked vs the current system state, invalid calls are detected and reported. This resolves at development time one of the most insidious errors in RTOS usage. Potentially saving, by design, from intermittent and hard to debug problems.|
Fastest RTOS? Reasons for this statement and performance data.
Both RT and NIL kernels support an advanced tick-less mode that allows to implement advanced power management.
One of the most advanced features of the RT kernel is the ability to handle software timers, delays and time-outs with a very high resolution.
One important debug feature in the RT kernel is the System State Checkers. This debug option can save countless hours lost in hunting intermittent problems.