#WATCHDOG TASK MANAGER PRO CODE#

When deleting a task that is currently running on the other core, a yield is triggered on the other core and the taskвЂ™s memory is freed by one of the idle tasks (depending on the taskвЂ™s core affinity)ДЄ deleted taskвЂ™s memory is freed immediately ifвЂ¦ When deleting a task that is pinned to the other core, that taskвЂ™s memory is always freed by the idle task of the other core (due to the need to clear FPU registers). However, due to the dual core nature, there are some behavioral differences when calling vTaskDelete() in ESP-IDF FreeRTOS: The actual freeing of the taskвЂ™s memory is sometimes delegated to the idle task (if the task being deleted is the currently running task).Д®SP-IDF FreeRTOS provides the same vTaskDelete() function. The function allows deletion of another task or the currently running task (if the provided task handle is NULL). Task deletion in Vanilla FreeRTOS is called via vTaskDelete(). However, they have been modified to simply call their PinnedToCore counterparts with tskNO_AFFINITY. Note that ESP-IDF FreeRTOS still supports the vanilla versions of the task creation functions. TskNO_AFFINITY which allows the task to be run on both CPUs The PinnedToCore versions of the task creation functions API differ from their vanilla counter parts by having an extra xCoreID parameter that is used to specify the created taskвЂ™s core affinity. The taskвЂ™s memory is statically allocated (i.e., provided by the user) XTaskCreateStaticPinnedToCore() creates a task with a particular core affinity. The taskвЂ™s memory is dynamically allocated. XTaskCreatePinnedToCore() creates a task with a particular core affinity. Therefore, ESP-IDF provides a PinnedToCore version of Vanilla FreeRTOSвЂ™s task creation functions: However, in an SMP system, tasks need to be assigned a particular affinity. The taskвЂ™s memory is dynamically allocated Vanilla FreeRTOS provides the following functions to create a task: Therefore, threads in an SMP systems will also have a core affinity that specifies which particular core the thread is allowed to run on.ДЄ thread that is pinned to a particular core will only be able to run on that coreДЄ thread that is unpinned will be allowed to switch between cores during execution instead of being pinned to a particular core. This in general can lead to better CPU utilization.ДЄlthough an SMP system allows threads to switch cores, there are scenarios where a thread must/should only run on a particular core. Having symmetric memory means that threads can switch cores during execution. The presence of multiple CPUs allows for multiple hardware threads, thus increases overall processing throughput.

The main advantages of an SMP system compared to single core or Asymmetric Multiprocessing systems are thatвЂ¦

#WATCHDOG TASK MANAGER PRO CODE#

Thus a piece of code that accesses a particular memory address will have the same effect regardless of which core it runs on.

Presents an identical view of memory to each core. Each core has its own register file, interrupts, and interrupt handling. Has multiple cores running independently. SMP (Symmetric Multiprocessing) is a computing architecture where two or more identical CPUs (cores) are connected to a single shared main memory and controlled by a single operating system.

Watchdog task manager pro