【GD32E503评测】——04.MCU CoreMark性能测试

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【GD32E503评测】——04.MCU CoreMark性能测试 [复制链接]

    CoreMark是用来衡量嵌入式系统中中心处理单元（CPU，或叫做微控制器MCU）性能的标准。该标准于2009年由EEMBC组织的Shay Gla-On提出，并且试图将其发展成为工业标准，从而代替陈旧的Dhrystone标准。代码使用C语言写成，包含如下的运算法则：列举（寻找并排序），数学矩阵操作（普通矩阵运算）和状态机（用来确定输入流中是否包含有效数字），最后还包括CRC（循环冗余校验）。

    为什么不用Dhrystone，而用CoreMark呢？Dhrystone是测量处理器运算能力的最常见基准程序之一，常用于处理器的整型运算性能的测量。程序是用C语言编写的，因此C编译器的编译效率对测试结果也有很大影响，所以Dhrystone还有许多漏洞，比如易被非法利用、人为痕迹明显、代码长度太短、缺乏验证及标准的运行规则等。

 

    一、准备工作

    1.1.到CoreMark官网上去下载开源的源代码：https://www.eembc.org/coremark/index.php（点击网页上的Download，然后跳转到GitHub上下载源代码）

    1.2.在下载的CoreMark源码中，我们只使用到了simple中的port接口适配文件和根目录下的源文件

    1.3.基础工程是基于上篇文章的代码上进行添加的；

 

二、移植CoreMark

    2.1.将CoreMark源代码添加到项目工程，如下图所示

    2.2.将工程的Optimization配置到O3级别，添加CoreMark的头文件路径，如下图所示：

    2.3.修改原先的main函数，因为CoreMark代码自带一个main入口函数，所以需要屏蔽之前我们自己写的main函数，如所示：

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/*******************************************************************************
 * @brief * @param       
 * @retval      
 * @attention *******************************************************************************/
int user_main(void)
{
    InitSystem();

    while(1)
    {
        TASK_Scheduling();

        MCU_DAC_OutputHandler();
    }
}

    2.4.修改SysTick_Handler函数，用于CoreMark运算过程中的计时处理，如所示：

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/*!
    \brief      this function handles SysTick exception
    \param[in]  none
    \param[out] none
    \retval     none
*/
void SysTick_Handler(void)
{
#if 0
    SysTick_Tick++;
    TASK_TimeSlice(SysTick_Tick);
#else
    CoreMark_IncTick();
#endif
}

    2.5.在core_portme.c文件中添加移植的代码，如下所示：

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/**
 * Copyright 2018 Embedded Microprocessor Benchmark Consortium (EEMBC)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Original Author: Shay Gal-on
 */


/* Includes ------------------------------------------------------------------*/
#include "config.h"
#include "coremark.h"


/* Private defines ----------------------------------------------------------*/
#define ITERATIONS  6000


/* Private variables --------------------------------------------------------*/
volatile uint8_t stop_time_flg = 1;


/* Exported function prototypes ---------------------------------------------*/
extern void InitSystem(void);


#if VALIDATION_RUN
volatile ee_s32 seed1_volatile = 0x3415;
volatile ee_s32 seed2_volatile = 0x3415;
volatile ee_s32 seed3_volatile = 0x66;
#endif

#if PERFORMANCE_RUN
volatile ee_s32 seed1_volatile = 0x0;
volatile ee_s32 seed2_volatile = 0x0;
volatile ee_s32 seed3_volatile = 0x66;
#endif

#if PROFILE_RUN
volatile ee_s32 seed1_volatile = 0x8;
volatile ee_s32 seed2_volatile = 0x8;
volatile ee_s32 seed3_volatile = 0x8;
#endif

volatile ee_s32 seed4_volatile = ITERATIONS;
volatile ee_s32 seed5_volatile = 0x0;


/**
 * Porting : Timing functions
 * How to capture time and convert to seconds must be ported to whatever is supported by the platform.
 * e.g. Read value from on board RTC, read value from cpu clock cycles performance counter etc. 
 * Sample implementation for standard time.h and windows.h definitions included.
 */


/**
 * Define : TIMER_RES_DIVIDER
 * Divider to trade off timer resolution and total time that can be measured.
 * 
 * Use lower values to increase resolution, but make sure that overflow does not occur.
 * If there are issues with the return value overflowing, increase this value.
 */
#define NSECS_PER_SEC                   1000
#define CORETIMETYPE                    clock_t 
#define MYTIMEDIFF(fin,ini)             ((fin)-(ini))
#define TIMER_RES_DIVIDER               1
#define EE_TICKS_PER_SEC                (NSECS_PER_SEC / TIMER_RES_DIVIDER)


/**
 * Define Host specific (POSIX), or target specific global time variables.
 */
static CORETIMETYPE start_time_val = 0, stop_time_val = 0;


/**
 * Function : start_time
 * This function will be called right before starting the timed portion of the benchmark.
 *
 * Implementation may be capturing a system timer (as implemented in the example code) 
 * or zeroing some system parameters - e.g. setting the cpu clocks cycles to 0.
 */
void start_time(void)
{
    stop_time_flg = 0;
    stop_time_val = 0;
}


/**
 * Function : stop_time
 * This function will be called right after ending the timed portion of the benchmark.
 *
 * Implementation may be capturing a system timer (as implemented in the example code) 
 * or other system parameters - e.g. reading the current value of cpu cycles counter.
*/
void stop_time(void)
{
	stop_time_flg = 1;
}


/**
 * Function : get_time
 * Return an abstract "ticks" number that signifies time on the system.
 *
 * Actual value returned may be cpu cycles, milliseconds or any other value,
 * as long as it can be converted to seconds by <time_in_secs>.
 * This methodology is taken to accomodate any hardware or simulated platform.
 * The sample implementation returns millisecs by default, 
 * and the resolution is controlled by <TIMER_RES_DIVIDER>
 */
CORE_TICKS get_time(void)
{
	CORE_TICKS elapsed=(CORE_TICKS)(MYTIMEDIFF(stop_time_val, start_time_val)); 
	return elapsed;
}


/**
 * Function : time_in_secs
 * Convert the value returned by get_time to seconds.
 *
 * The <secs_ret> type is used to accomodate systems with no support for floating point.
 * Default implementation implemented by the EE_TICKS_PER_SEC macro above.
 */
secs_ret time_in_secs(CORE_TICKS ticks)
{
    secs_ret retval=((secs_ret)ticks) / (secs_ret)EE_TICKS_PER_SEC;
    return retval;
}


ee_u32 default_num_contexts = 1;


/**
 * Function : portable_init
 * Target specific initialization code 
 * Test for some common mistakes.
 */
void portable_init(core_portable *p, int *argc, char *argv[])
{
    InitSystem();

    if (sizeof(ee_ptr_int) != sizeof(ee_u8 *))
    {
        ee_printf("ERROR! Please define ee_ptr_int to a type that holds a pointer!\n");
    }

    if (sizeof(ee_u32) != 4)
    {
        ee_printf("ERROR! Please define ee_u32 to a 32b unsigned type!\n");
    }

    p->portable_id=1;
}


/**
 * Function : portable_fini
 * Target specific final code 
 */
void portable_fini(core_portable *p)
{
    p->portable_id=0;
}


/**
 * @brief  : time.h
 * @param  : 
 * @returns: 
 * @details: 
 */
void CoreMark_IncTick(void)
{
    if(stop_time_flg == 0) stop_time_val++;
}


/************************ (C) COPYRIGHT ************************END OF FILE****/

 

三、运行调试

    将程序都移植完成后，对项目工程进行编译，编译无误后下载到开发板进行运行测试；

    在第一次下载运行后，串口就输出“ERROR! Must execute for at least 10 secs for a valid result!”的错误提示，如下图所示：

    执行的时间小于了10秒钟，我们修改了core_portme.c中的ITERATIONS这个宏定义值，将原先的2500修改到6000，再次尝试运行时，程序运行正常，测试结果如下所示：

    从上图我们可以看到CoreMark的测试结果值为576.6，当然这是基于上一个工程的基础上做的一个移植，程序运行还有可优化的空间，后面再继续研究！

 

四、源代码

Project_CoreMark.zip (438.96 KB, 下载次数: 5)

2021-2-14 21:46 上传

点击文件名下载附件

caizhiwei

AC5和AC6会有差异，而且优化等级也有影响。

caizhiwei

５００多分不算高，ｓｔｍ３２Ｈ７可以达到２０００＋

w494143467

测评写的不错，就喜欢你这样的测评帖子，感谢老铁的分享！期待后续

xld0932

w494143467 发表于 2021-2-17 14:51 测评写的不错，就喜欢你这样的测评帖子，感谢老铁的分享！期待后续

谢谢

freebsder

576.6 代表什么意思？