papi_example.cpp

#include <papi.h>
#include <stdio.h>
#include <iostream>
#include <vector>

int main() {
  std::vector<int> Events = {
    PAPI_BR_MSP,
    PAPI_BR_NTK,
    PAPI_TLB_IM
  };
  std::vector<long long int> values(Events.size());
  if (PAPI_start_counters(Events.data(), Events.size()) != PAPI_OK) {
    std::cout << "start_counter failed" << std::endl;
    perror("start");
    return 1;
  }

  int sum = 0;
  for (int i = 0; i < 10000; ++i) {
    if (i % 10 == 0) {
      sum += i * i;
    }
  }

  if (PAPI_read_counters(values.data(), values.size()) != PAPI_OK) {
    std::cout << "read counter failed" << std::endl;
    return 1;
  }
  if (PAPI_stop_counters(values.data(), values.size()) != PAPI_OK) {
    std::cout << "stop counter failed" << std::endl;
    return 1;
  };
  for (auto& v : values) {
    std::cout << v << std::endl;
  }
}