- 运行设备：ESP32S3，已经在编译选项中开启性能优化模式，并把 CPU 频率调到了 240MHz 。
- 目的：模拟 ESP32S3 处理图片，并测试性能
- 问题：测试时发现，以这个参数执行下来，每次计时循环平均耗时 150963 微秒，平均下来一次 float 计算要1微秒。请问是什么原因导致的呢？感谢您的帮助！
Code: Select all
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_log.h"
#define M2T(X) ((unsigned int)(X) / portTICK_PERIOD_MS) // ms to tick
#include "esp_random.h"
#include <sys/time.h>
static const char *TAG = "main";
#define dataLen 14400
void makeMatrixUint8(uint8_t *buf, int len)
{
for (int i = 0; i < len; i++)
{
esp_fill_random(&buf[i], sizeof(uint8_t));
}
}
void makeMatrixFloat(float *buf, int len)
{
for (int i = 0; i < len; i++)
{
esp_fill_random(&buf[i], sizeof(float));
}
}
static void testTask()
{
uint8_t [i]testData1 = (uint8_t *)malloc(sizeof(uint8_t) [/i] dataLen);
float [i]testData2 = (float *)malloc(sizeof(float) [/i] dataLen);
struct timeval tv_d0;
struct timeval tv_d1;
while (1)
{
makeMatrixUint8(testData1, dataLen);
makeMatrixFloat(testData2, dataLen);
gettimeofday(&tv_d0, NULL);
for (int t = 0; t < 10; t++)
{
for (int i = 0; i < dataLen; i++)
{
testData2[i] = testData1[i] * 0.3;
}
}
gettimeofday(&tv_d1, NULL);
ESP_LOGI(TAG, "%lu", 1000000 * (tv_d1.tv_sec - tv_d0.tv_sec) + (tv_d1.tv_usec - tv_d0.tv_usec));
vTaskDelay(1);
}
}
void app_main()
{
xTaskCreate(testTask, "servoTask", 1024 * 4, NULL, tskIDLE_PRIORITY, NULL);
}