The pretty-papi header library allows you to benchmark PAPI hardware counters in your code with a similar interface and similar output as Google Benchmark.
Just include the header library
#include "prettypapi.hpp"Then register your PAPI hardware counters using the REGISTER_PAPI macro e.g.
REGISTER_PAPI(PAPI_TOT_CYC, PAPI_L1_TCM);Define a function that executes the code to measure with the following signature:
void some_name(papi::event_code eventset, papi::papi_counter *counter)The code you want to measure should be executed between the macros PAPI_START and PAPI_OVER. Initializations and clean ups you want to exclude from the benchmark can be defined within the function before and after those macros respectively.
At the end register your functions by using the PAPI_MAIN macro.
PAPI_MAIN(some_name);The following code provides a full example and can be found here.
#include "benchmark_function.hpp"
#include "prettypapi.hpp"
#define VEC_SIZE 3200
REGISTER_PAPI(PAPI_TOT_CYC, PAPI_L1_TCM);
void BM_reduction_naive(papi::event_code eventset, papi::papi_counter *counter) {
std::vector<double> vec;
initialize_vector(vec, VEC_SIZE);
PAPI_START;
{ double sum = reduction_naive(vec); }
PAPI_OVER;
}
void BM_reduction_opt(papi::event_code eventset, papi::papi_counter *counter) {
std::vector<double> vec;
initialize_vector(vec, VEC_SIZE);
PAPI_START;
{ double sum = reduction_opt(vec); }
PAPI_OVER;
}
PAPI_MAIN(BM_reduction_naive, BM_reduction_opt);The example from above gives an output like this:
