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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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CPU usage ?Posted by Nobody/Anonymous on January 3, 2006 hi have freertos cpuusage for 1.max cpuusage 2. each rack cpuusage ? 3. stack address of each task to check normally stack usage in run-time and also i see freertos use write one const value in stack before use it is nice better if add function to chk change if this const value in run-time and report it i agree is get some CPU usage but in optional run and then report in debug time RE: CPU usage ?Posted by Richard on January 3, 2006 1) Depends on port, CPU MHz, compiler and tick frequency. 2) ? 3) Take a look at the function usTaskCheckFreeStackSpace() defined in task.c. Regards. RE: CPU usage ?Posted by Nobody/Anonymous on January 3, 2006 seems i dont true speak about my qustion ... 1)some os have one function see what present od cpu usage (max , avrage) have you plan add to it to freertos ? RE: CPU usage ?Posted by Nobody/Anonymous on January 4, 2006 If you see UCOS II rtos source or ebook,It uses idle task hook function to calculate CPU usage for all tacks, The method is: In every one second ,calculate the time that you are in idle task ,so you can calculate persentage of idle time in each second and obtain cpu usage by subtacting it from 100%. CPU Usage = ((1000msec - (idle time in msec))/1000)*100)
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
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