uxTaskGetSystemState() function

// This example demonstrates how a human readable table of run time stats // information is generated from raw data provided by uxTaskGetSystemState(). // The human readable table is written to pcWriteBuffer void vTaskGetRunTimeStats( char *pcWriteBuffer ) { TaskStatus_t *pxTaskStatusArray; volatile UBaseType_t uxArraySize, x; uint32_t ulTotalRunTime, ulStatsAsPercentage; // Make sure the write buffer does not contain a string. pcWriteBuffer = 0x00; // Take a snapshot of the number of tasks in case it changes while this // function is executing. uxArraySize = uxTaskGetNumberOfTasks(); // Allocate a TaskStatus_t structure for each task. An array could be // allocated statically at compile time. pxTaskStatusArray = pvPortMalloc( uxArraySize * sizeof( TaskStatus_t ) ); if( pxTaskStatusArray != NULL ) { // Generate raw status information about each task. uxArraySize = uxTaskGetSystemState( pxTaskStatusArray, uxArraySize, &ulTotalRunTime ); // For percentage calculations. ulTotalRunTime /= 100UL; // Avoid divide by zero errors. if( ulTotalRunTime > 0 ) { // For each populated position in the pxTaskStatusArray array, // format the raw data as human readable ASCII data for( x = 0; x < uxArraySize; x++ ) { // What percentage of the total run time has the task used? // This will always be rounded down to the nearest integer. // ulTotalRunTimeDiv100 has already been divided by 100. ulStatsAsPercentage = pxTaskStatusArray[ x ].ulRunTimeCounter / ulTotalRunTime; if( ulStatsAsPercentage > 0UL ) { sprintf( pcWriteBuffer, "%s\t\t%lu\t\t%lu%%\r\n", pxTaskStatusArray[ x ].pcTaskName, pxTaskStatusArray[ x ].ulRunTimeCounter, ulStatsAsPercentage ); } else { // If the percentage is zero here then the task has // consumed less than 1% of the total run time. sprintf( pcWriteBuffer, "%s\t\t%lu\t\t<1%%\r\n", pxTaskStatusArray[ x ].pcTaskName, pxTaskStatusArray[ x ].ulRunTimeCounter ); } pcWriteBuffer += strlen( ( char * ) pcWriteBuffer ); } } // The array is no longer needed, free the memory it consumes. vPortFree( pxTaskStatusArray ); } }