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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [October 2006 Threads] measurement of whole OS efficiency, advicePosted by Nobody/Anonymous on October 20, 2006 //------------------------------------------------------------------------------------------------------------------------------- idleTask
static u32_t cpu_free_time = 0;
void vApplicationIdleHook( void ); void vApplicationIdleHook( void )// for tests only, there must not be vTaskDelay { #if DEVBRD AT91C_BASE_PIOA->PIO_SODR = LED_BT; #endif portENTER_CRITICAL(); cpu_free_time++; portEXIT_CRITICAL(); }
//---------------------------------------------------------------------------------------------- static void vUserTask( void *pvParameters ); static void vUserTask( void *pvParameters ) { (void) pvParameters; static char LEDblink = 0; static u32_t cpu_time; #defineledblink(led)if (LEDblink) ledon(led); else ledoff(led)
while (1) { LEDblink ^= 1;// switch blinking
//-------------------------------------------------------------------------------------------- OS control state LED
ledblink(LED_WORK);
vTaskDelay(( portTickType ) 500/*ms*/);// disable for debug vTaskUser stack... //kprintf("usrSP: %d\n", vGetSP());// debug
// measure of cpu free time portENTER_CRITICAL(); cpu_time = cpu_free_time; cpu_free_time = 0; portEXIT_CRITICAL(); kprintf("cpu free: %lu\n", cpu_time); }// while(1) }
if cpu free = 0, you should correct your tasks, for example: while(1) vTaskDelay(50); instead of while(1);
best regards Janusz
RE: measurement of whole OS efficiency, advicPosted by Neil Bradley on October 20, 2006 As an aside, what is the point of this:
static void vUserTask( void *pvParameters ); static void vUserTask( void *pvParameters ) { ... }
Putting the function prototype right above the function itself?
RE: measurement of whole OS efficiency, advicePosted by Nobody/Anonymous on October 21, 2006 I have this function in main.c file. Thus, I have not prototype in header file and I wanted to avoid compiler warning...
Janusz
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