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Trying to use vTaskGetRunTimeStats but getting back empty string.

Posted by jordied on May 25, 2014

Hi,

So I have the following reference to vTaskGetRunTimeStats in a CLI command.

static portBASE_TYPE prvGetTimeCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString ) {

    	/* Get tasks */
    	signed char * buffer =(signed char *)  pcWriteBuffer;
    	vTaskGetRunTimeStats(buffer);
    	/* print out tasks */
    	debug_printf("\n\r\%s\n\r", buffer);
    	return pdFALSE;
}

However It simply prints out a blank line. My FreeRTOSConfig.h has the following (what was listed on the webpage):

#define configUSE_STATS_FORMATTING_FUNCTIONS	1
#define configGENERATE_RUN_TIME_STATS	1
volatile unsigned long ulHighFrequencyTimerTicks;
#define portCONFIGURE_TIMER_FOR_RUN_TIME_STATS() ( ulHighFrequencyTimerTicks = 0UL )
#define portGET_RUN_TIME_COUNTER_VALUE()	ulHighFrequencyTimerTicks

This is running on a Netduino plus 2, so a STM32F4.

Any ideas on how to get it to run? It complies without a warning so I am unsure. I have looked around with a few google searches and I don't know what could be causing this.


Trying to use vTaskGetRunTimeStats but getting back empty string.

Posted by rtel on May 25, 2014

When you step through the code, where is the output lost? Is data created within vTaskGetRunTimeStats() but not printed out, or is just no data created within the function at all.

When configUSESTATSFORMATTING_FUNCTIONS is set to 1 the standard libraries are used for string formatting, so I would guess (as I don't have your code in front of me I can't step through the function) that the formatting functions are just not creating any output, probably because the development environment is set up to exclude them or only include very limited versions in order to save flash memory.

If you search the /FreeRTOS/Demo directory you will find lots of references to a file called printf-stdarg.c. That file contains a very tiny implementation of the standard library functions needed. Try including that file in your project to override the same functions that would otherwise be brought in from the standard library to see if that helps.

Regards.


Trying to use vTaskGetRunTimeStats but getting back empty string.

Posted by heinbali01 on May 25, 2014

Hi there,

I just tried-out 'task tracing' by inserting the following in my FreeRTOSConfig.h:

~~~~~~ extern unsigned getRunTimeCounterValue(void); extern void configureTimerForRunTimeStats(void);

define portGETRUNTIMECOUNTERVALUE getRunTimeCounterValue
define configGENERATERUNTIME_STATS 1
define configUSESTATSFORMATTING_FUNCTIONS 1
define portCONFIGURETIMERFORRUNTIME_STATS configureTimerForRunTimeStats
define configUSETRACEFACILITY 1

~~~~~~

I added this bit of code in a C-file:

~~~~~~ unsigned getRunTimeCounterValue(void) { return ulHighFrequencyTimerTicks; }

void configureTimerForRunTimeStats(void) { ulHighFrequencyTimerTicks = 0UL; } ~~~~~~

and it showed this output:

~~~~~~ mainTask 4312 6% tunerTask 1415 2% logbufTask 34 <1% IDLE 56994 90% IP-task 15 <1% MACB 6 <1% ~~~~~~

It is hard to tell why it doesn't work for you, but I'm surprised that your compiler accepts this:

~~~~~~ ( ulHighFrequencyTimerTicks = 0UL ) ~~~~~~

without a closing semi-colon

Regards, Hein Tibosch

Edit:

Sorry I was mistaken, there is nothing wrong with your:

~~~~~~

define portCONFIGURETIMERFORRUNTIME_STATS() ( ulHighFrequencyTimerTicks = 0UL )

~~~~~~

as it uses parentheses and not braces


Trying to use vTaskGetRunTimeStats but getting back empty string.

Posted by jordied on May 25, 2014

Hmmm, I still can't get it to work. I tried your suggestion Hein.

So you can try and understand more, here is more of what's going on

main.c

#include "netduinoplus2.h"
#include "debug_printf.h"
#include "nrf24l01plus.h"

#include "netconf.h"
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"

#include "tuioclient.h"
#include "usbd_cdc_vcp.h"
#include "FreeRTOS_CLI.h"

#include "tcpip.h"
#include "lwip/opt.h"
#include "lwip/api.h"
#include "lwip/sys.h"
#include "lwip/sockets.h"

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include "hardware.h"
#include "utility.h"
#include "convolutional.h"
#include "hamming.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/


#define TCP_SOCKET_PORT	3000
#define UDP_SOCKET_PORT	3333

#define START_BASE_ADDRESS 0x12345678

#define DEBUG 1
#define EXPECT_NOTHING 0
#define EXPECT_PASSKEY 1
#define EXPECT_SENSOR 2
/* Task Priorities -----------------------------------------------------------*/
#define SERVOTASK_PRIORITY    ( tskIDLE_PRIORITY + 1 )
#define UDPTASK_PRIORITY    ( tskIDLE_PRIORITY + 1 )
#define mainCLI_PRIORITY	( tskIDLE_PRIORITY + 2 )
#define mainRADIO_PRIORITY	( tskIDLE_PRIORITY + 1 )


/* Task Stack Allocations -----------------------------------------------------*/
#define SERVOTASK_STACK_SIZE		( configMINIMAL_STACK_SIZE * 2)
#define UDPTASK_STACK_SIZE		( configMINIMAL_STACK_SIZE * 2 )
#define mainCLI_TASK_STACK_SIZE		( configMINIMAL_STACK_SIZE * 10 )
#define mainRADIO_TASK_STACK_SIZE		( configMINIMAL_STACK_SIZE * 4 )


/* Private macro -------------------------------------------------------------*/


/* Private variables ---------------------------------------------------------*/
xQueueHandle ServoQueue1;	/* Queue used */
int radioExpecting = EXPECT_NOTHING;

extern uint8_t SequenceNumber;
extern uint8_t Passkey;

/* Private function prototypes -----------------------------------------------*/
static void Hardware_init();


// Servo Contol Tasks
void UDPTask(void * pvParameters);
void ServoTask(void * pvParameters);
void RadioReceiveTask(void * pvParameters);

// CLI functions and task
void CLI_Task(void);
static portBASE_TYPE prvEchoCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvLaserCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvStateCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvConvCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvDecodeCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvGetPasskeyCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvGetSensorCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvRFChanSetCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
static portBASE_TYPE prvGetTimeCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
#ifdef DEBUG
static portBASE_TYPE prvDEBUGCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString );
#endif

void vApplicationIdleHook( void );	/* The idle hook is just used to stream data to the USB port.*/


xCommandLineInput xGetTime= {	/* Structure that defines the "getpasskey" command line command. */
	"gettime",
	"gettime: Get the system uptime\r\n",
	prvGetTimeCommand,
	0
};


    int main(void) {

    	NP2_boardinit();
    	debug_printf("Hardware .\n\r");
    	Hardware_init();
       debug_printf("LWIP  tasks.\n\r");
      	/* Initilaize the LwIP stack */
      	LwIP_Init();
        debug_printf("Create  tasks.\n\r");
    	xTaskCreate( (void *) &ServoTask, (const signed char *) "Servo", SERVOTASK_STACK_SIZE, NULL, SERVOTASK_PRIORITY, NULL);
    	xTaskCreate( (void *) &UDPTask, (const signed char *) "UDP", UDPTASK_STACK_SIZE, NULL,UDPTASK_PRIORITY, NULL);
    	xTaskCreate( (void *) &CLI_Task, (const signed char *) "CLI", mainCLI_TASK_STACK_SIZE, NULL, mainCLI_PRIORITY, NULL );
    	xTaskCreate( (void *) &RadioReceiveTask, (const signed char *) "RADIO", mainRADIO_TASK_STACK_SIZE, NULL, mainRADIO_PRIORITY, NULL );
    	debug_printf("Start CLI\n\r");
    	// Register CLI Commands //
    	FreeRTOS_CLIRegisterCommand(&xGetTime);
      	debug_printf("Start scheduler.\n\r");
      	/* Start scheduler */
      	vTaskStartScheduler();

    	return 0;
    }
    static portBASE_TYPE prvGetTimeCommand(char *pcWriteBuffer, size_t xWriteBufferLen, const char *pcCommandString ) {

    	/* Get tasks */
    	signed char * buffer =(signed char *)  pcWriteBuffer;
    	vTaskGetRunTimeStats(buffer);
    	/* print out tasks */
    	debug_printf("\n\r----------------------------------------------\n\r%s\n\r----------------------------------------------\n\r", buffer);
    	/* Return pdFALSE, as there are no more strings to return */
    	/* Only return pdTRUE, if more strings need to be printed */
    	xWriteBufferLen = sprintf((char *) pcWriteBuffer, "\n\r%s\n\r",buffer);
    	return pdFALSE;
        }

unsigned getRunTimeCounterValue(void){
	return ulHighFrequencyTimerTicks;
}

void configureTimerForRunTimeStats(void)
{
    ulHighFrequencyTimerTicks = 0UL;
}

and FreeRTOSConfig.h

/*
    FreeRTOS V7.5.3 - Copyright (C) 2013 Real Time Engineers Ltd. 
    All rights reserved

    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS provides completely free yet professionally developed,    *
     *    robust, strictly quality controlled, supported, and cross          *
     *    platform software that has become a de facto standard.             *
     *                                                                       *
     *    Help yourself get started quickly and support the FreeRTOS         *
     *    project by purchasing a FreeRTOS tutorial book, reference          *
     *    manual, or both from: http://www.FreeRTOS.org/Documentation        *
     *                                                                       *
     *    Thank you!                                                         *
     *                                                                       *
    ***************************************************************************

    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.

    >>! NOTE: The modification to the GPL is included to allow you to distribute
    >>! a combined work that includes FreeRTOS without being obliged to provide
    >>! the source code for proprietary components outside of the FreeRTOS
    >>! kernel.

    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    FOR A PARTICULAR PURPOSE.  Full license text is available from the following
    link: http://www.freertos.org/a00114.html

    1 tab == 4 spaces!

    ***************************************************************************
     *                                                                       *
     *    Having a problem?  Start by reading the FAQ "My application does   *
     *    not run, what could be wrong?"                                     *
     *                                                                       *
     *    http://www.FreeRTOS.org/FAQHelp.html                               *
     *                                                                       *
    ***************************************************************************

    http://www.FreeRTOS.org - Documentation, books, training, latest versions,
    license and Real Time Engineers Ltd. contact details.

    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
    compatible FAT file system, and our tiny thread aware UDP/IP stack.

    http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
    Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS
    licenses offer ticketed support, indemnification and middleware.

    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
    engineered and independently SIL3 certified version for use in safety and
    mission critical applications that require provable dependability.

    1 tab == 4 spaces!
*/

#ifndef FREERTOS_CONFIG_H
#define FREERTOS_CONFIG_H

/*-----------------------------------------------------------
 * Application specific definitions.
 *
 * These definitions should be adjusted for your particular hardware and
 * application requirements.
 *
 * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
 * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
 *
 * See http://www.freertos.org/a00110.html.
 *----------------------------------------------------------*/

#define configCOMMAND_INT_MAX_OUTPUT_SIZE			1024	//1024

#define configUSE_PREEMPTION		1
#define configUSE_IDLE_HOOK			0
#define configUSE_TICK_HOOK			0
#define configCPU_CLOCK_HZ			( ( unsigned long ) 25000000 )
#define configTICK_RATE_HZ			( ( portTickType ) 1000 )
#define configMAX_PRIORITIES		( ( unsigned portBASE_TYPE ) 5 )
#define configMINIMAL_STACK_SIZE	( ( unsigned short ) 120 )
#define configTOTAL_HEAP_SIZE		( ( size_t ) ( 18 * 1024 ) )
#define configMAX_TASK_NAME_LEN		( 16 )




// I modified
#define configUSE_TRACE_FACILITY	1
#define configUSE_STATS_FORMATTING_FUNCTIONS	1
/* ulHighFrequencyTimerTicks is already being incremented at 20KHz.  Just set
its value back to 0. */
volatile unsigned long ulHighFrequencyTimerTicks;
extern unsigned getRunTimeCounterValue(void);
extern void configureTimerForRunTimeStats(void);
/* ulHighFrequencyTimerTicks is already being incremented at 20KHz.  Just set
its value back to 0. */
#define portCONFIGURE_TIMER_FOR_RUN_TIME_STATS	configureTimerForRunTimeStats
#define portGET_RUN_TIME_COUNTER_VALUE	getRunTimeCounterValue

#define configUSE_16_BIT_TICKS		0
#define configIDLE_SHOULD_YIELD		1

/* Co-routine definitions. */
#define configUSE_CO_ROUTINES 		0
#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )

#define configUSE_MUTEXES				1
#define configUSE_COUNTING_SEMAPHORES 	1
#define configUSE_ALTERNATIVE_API 		0
#define configCHECK_FOR_STACK_OVERFLOW	2
#define configUSE_RECURSIVE_MUTEXES		1
#define configQUEUE_REGISTRY_SIZE		0
#define configGENERATE_RUN_TIME_STATS	1

/* Set the following definitions to 1 to include the API function, or zero
to exclude the API function. */

#define INCLUDE_vTaskPrioritySet		1
#define INCLUDE_uxTaskPriorityGet		1
#define INCLUDE_vTaskDelete				1
#define INCLUDE_vTaskCleanUpResources	0
#define INCLUDE_vTaskSuspend			0	//1
#define INCLUDE_vTaskDelayUntil			1
#define INCLUDE_vTaskDelay				1

/* Cortex-M specific definitions. */
#ifdef __NVIC_PRIO_BITS
	/* __BVIC_PRIO_BITS will be specified when CMSIS is being used. */
	#define configPRIO_BITS       		__NVIC_PRIO_BITS
#else
	#define configPRIO_BITS       		4        /* 15 priority levels */
#endif

/* The lowest interrupt priority that can be used in a call to a "set priority"
function. */
#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0xf

/* The highest interrupt priority that can be used by any interrupt service
routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL
INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER
PRIORITY THAN THIS! (higher priorities are lower numeric values. */
#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	5

/* Interrupt priorities used by the kernel port layer itself.  These are generic
to all Cortex-M ports, and do not rely on any particular library functions. */
#define configKERNEL_INTERRUPT_PRIORITY 		( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
#define configMAX_SYSCALL_INTERRUPT_PRIORITY 	( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )

/* Normal assert() semantics without relying on the provision of an assert.h
header file. */
#define configASSERT( x ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }	

/* Definitions that map the FreeRTOS port interrupt handlers to their CMSIS
standard names. */
#define vPortSVCHandler SVC_Handler
#define xPortPendSVHandler PendSV_Handler
#define xPortSysTickHandler SysTick_Handler

#endif /* FREERTOS_CONFIG_H */

Trying to use vTaskGetRunTimeStats but getting back empty string.

Posted by rtel on May 28, 2014

Sorry for the delay - for some reason your post went into moderation rather than just appearing. I need to contact SourceForge to find out why that happens occasionally.

I'm afraid all I can do is ask the same questions that I already asked in my original reply to you. When you step through the code and watch what is going on, at what point do you see it go wrong. For example, if you step into the vTaskGetRunTimeStats() you will see multiple calls to sprintf() to build up the string that is returned - is anything generated by those calls to sprintf()? If not, which sprintf() implementation is being used and have you tried my previous suggestion of replacing it. If so, at what point between the sub strings being created and the output being sent to where ever it is going do you see the data being lost?

I'm afraid I cannot guess at where the problem may be, but you have the code in front of you so are able to provide the information we need to be able to assist you rectify it.

Also - what is debug_printf() doing? If it is using semi-hosting to generate output in your IDE then that can cause problems as it may conflict with interrupts used by the kernel.

You may also like to opt to use a later version of FreeRTOS as from V7.6.0 onwards we put in some additional asserts specifically for STM32 users as the asserts help trap common misconfigurations for those parts.

Regards, Richard Barry.


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