Hello, i have an application with several tasks (~12) running at the same time. There are tasks blocked by a queue which will get data only seldomly (on user input). After a few hours, the queue will fill with data on user input (I checked), but the task keeps suspended. In the Debugger it says …

Do you have configASSERT() defined?

Hello, yes it is defined, but is is not triggered. The Code is running normally, with the exception that the one thread stays suspended. I also had ported the most current FreeRTOS-Version and now it is running fine since the morning. I hope it will still be good tomorrow. Edit: Never mind, erro…

When you say there are tasks blocked on a queue you mean there is a dedicated queue per task, right ? And a number of tasks are getting blocked forever unexpectedly or just 1 task ? If a couple of those tasks are affected is one after the other or all at once ? However, it’s a pretty strange errone…

Hello, I have no noticed that multiple tasks can get stuck, but each with their own queue. It is not predictable, which task will get stuck when, they seem to be independent. I have disabled dynamic allocation and I am not using malloc throughout the application because of safety / reliability co…

Is it possible that you post some code that demonstrates the issue?

Hello, unfortuanetly the project is quite complex and I’d need to share about 100.000 lines of code. So I am sorry, I cannot share.

Maybe it’s possible to post just the relevant code snippets. The basic user input (ISR ?) part feeding the queue(s) and the task queue receive loop along with the queue creation (global variables ?). However, your problem is still strange and hard to tackle. Is it a custom/your project or a gene…

Hello, thank you for your questions. Here are the my answers: This is a custom pcb with a NXP Kinetis KL82 Project stack usage is about 93 % (is this what you asked for?) When the error occurs, the queue is still there and gets loaded with data, I can observer that in the debugger. I am using Mc…

Hello, I noticed even tasks which just block on delay are getting stuck. Then the event object “Unknown” appears, where there was nothing before.

Just focusing on this for the moment. Am I right in interpreting this as if you just create one task that does this: void my_task( void *pv ) { volatile int my_var = 0; for( ;; ) { vTaskDelay( 10 ); my_var++; } } then my_var will never get incremented? If so, does th…

Tasks waiting on queues get stuck

Kernel

mldevw (mldevw) October 30, 2020, 5:39am 19

yes. This is how I found out that the “Event Object” is the queue blocked on or nothing (for tasks with delay) and in the error case it is “Unknown Object” with an invalid adress.

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Tasks waiting on queues get stuck

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