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Information on Symmetric Multiprocessing (SMP) with FreeRTOS
FreeRTOS scheduling algorithm for single-core, asymmetric multicore (AMP), and symmetric multicore (SMP) RTOS configurations
The new FreeRTOS V11 has Symmetric Multi-Processing (SMP) integrated, simplifying its usage for single-core and multi-core applications. SMP support, previously available through dedicated forks, is now integrated into the mainline. Configuration options for SMP are available, and debugging for multi-core applications is also possible. However, some limitations with debugging support currently ...
The FreeRTOS SMP kernel has two type of Idle tasks: Idle Task - There is the standard Idle task used in single core FreeRTOS applications. Minimal Idle Tasks - There are configNUM_CORES - 1 Minimal Idle tasks which are run on idle cores and which do nothing.; The minimal idle tasks can optionally call an application-defined hook (or callback) function - the minimal idle hook.
FreeRTOS SMP demos developed in this repository have been merged into the FreeRTOS-Community-Supported-Demos repository. We recommend to use the demos available there. The contents of this repository will remain available but we will no longer provide updates or accept new contributions and pull requests.
FreeRTOS SMP demos for the Raspberry Pi Pico board.
FreeRTOS adds symmetric multiprocessing (SMP) support in the kernel, enabling developers designing FreeRTOS-based applications to utilize the SMP capabilities of multi-core microcontrollers. Multi-core microcontrollers, in which two or more identical processor cores share the same memory, allow the operating system to distribute tasks between ...
These two demos use SMP pattern 4, where the RTOS chooses and balances: Blinky demo; Comprehensive demo; Then there is an example that shows pattern 2, where the RTOS runs on one core. Multicore demo; This comes in two flavours, one that runs the RTOS on core 0, the other executes it on core 1. The blog series will focus on the comprehensive demo.
Fundamentally, a SMP RTOS needs to be designed / implemented from scratch as a multi-core RTOS and that alike a 180 degrees shift from the way a single core RTOS is implemented. I am highly biased because our product is a SMP RTOS - I agree with you, a single binary makes more sense . You should be able to get what you want from our freeware page.
The FreeRTOS API remains substantially the same between single core and SMP versions except for these additions. Therefore, an application written for the FreeRTOS single core version should compile with the SMP version with minimal to no effort. However, there may be some functional issues, as some assumptions which were true for single core ...