ESP32-性能监控笔记

基于ESP-IDF4.1
 1 #include <stdio.h>
 2 #include <string.h>
 3 #include <unistd.h>
 4 #include "esp_timer.h"
 5 #include "esp_log.h"
 6 #include "esp_sleep.h"
 7 #include "sdkconfig.h"
 8 
 9 #include "perfmon.h"
10 
11 static const char* TAG = "example";
12 
13 static void exec_test_function(void *params)
14 {
15     for (int i = 0 ; i < 100 ; i++) {
16         __asm__ __volatile__("   nop");
17     }
18 }
19 
20 //具有专用性能计数器的表
21 static uint32_t pm_check_table[] = {
22     XTPERF_CNT_CYCLES, XTPERF_MASK_CYCLES, // 周期合计
23     XTPERF_CNT_INSN, XTPERF_MASK_INSN_ALL, // 指令合计
24     XTPERF_CNT_D_LOAD_U1, XTPERF_MASK_D_LOAD_LOCAL_MEM, // 内存读取
25     XTPERF_CNT_D_STORE_U1, XTPERF_MASK_D_STORE_LOCAL_MEM, // 内存写入
26     XTPERF_CNT_BUBBLES, XTPERF_MASK_BUBBLES_ALL &(~XTPERF_MASK_BUBBLES_R_HOLD_REG_DEP),  // 等待其他原因
27     XTPERF_CNT_BUBBLES, XTPERF_MASK_BUBBLES_R_HOLD_REG_DEP,           // 等待寄存器依赖
28     XTPERF_CNT_OVERFLOW, XTPERF_MASK_OVERFLOW,               // 最后一个测试周期
29 };
30 
31 #define TOTAL_CALL_AMOUNT 200
32 #define PERFMON_TRACELEVEL -1 // -1 - 忽略跟踪级别
33 
34 void app_main(void)
35 {
36     ESP_LOGI(TAG, "Start");
37     ESP_LOGI(TAG, "Start test with printing all available statistic");
38     xtensa_perfmon_config_t pm_config = {};
39     pm_config.counters_size = sizeof(xtensa_perfmon_select_mask_all) / sizeof(uint32_t) / 2;
40     pm_config.select_mask = xtensa_perfmon_select_mask_all;
41     pm_config.repeat_count = TOTAL_CALL_AMOUNT;
42     pm_config.max_deviation = 1;
43     pm_config.call_function = exec_test_function;
44     pm_config.callback = xtensa_perfmon_view_cb;
45     pm_config.callback_params = stdout;
46     pm_config.tracelevel = PERFMON_TRACELEVEL;
47     xtensa_perfmon_exec(&pm_config);
48 
49     ESP_LOGI(TAG, "Start test with user defined statistic");
50     pm_config.counters_size = sizeof(pm_check_table) / sizeof(uint32_t) / 2;
51     pm_config.select_mask = pm_check_table;
52     pm_config.repeat_count = TOTAL_CALL_AMOUNT;
53     pm_config.max_deviation = 1;
54     pm_config.call_function = exec_test_function;
55     pm_config.callback = xtensa_perfmon_view_cb;
56     pm_config.callback_params = stdout;
57     pm_config.tracelevel = PERFMON_TRACELEVEL;
58 
59     xtensa_perfmon_exec(&pm_config);
60 
61     ESP_LOGI(TAG, "The End");
62 }
原文：https://gitee.com/EspressifSystems/esp-idf/tree/master/examples/system/perfmon