test/cpp/microbenchmarks/helpers.cc

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#include "test/cpp/microbenchmarks/helpers.h"

void TrackCounters::Finish(benchmark::State &state) {
  std::ostringstream out;
  AddToLabel(out, state);
  auto label = out.str();
  if (label.length() && label[0] == ' ') {
    label = label.substr(1);
  }
  state.SetLabel(label);
}

void TrackCounters::AddToLabel(std::ostream &out, benchmark::State &state) {
#ifdef GPR_LOW_LEVEL_COUNTERS
  grpc_memory_counters counters_at_end = grpc_memory_counters_snapshot();
  out << " locks/iter:" << ((double)(gpr_atm_no_barrier_load(&gpr_mu_locks) -
                                     mu_locks_at_start_) /
                            (double)state.iterations())
      << " atm_cas/iter:"
      << ((double)(gpr_atm_no_barrier_load(&gpr_counter_atm_cas) -
                   atm_cas_at_start_) /
          (double)state.iterations())
      << " atm_add/iter:"
      << ((double)(gpr_atm_no_barrier_load(&gpr_counter_atm_add) -
                   atm_add_at_start_) /
          (double)state.iterations())
      << " nows/iter:"
      << ((double)(gpr_atm_no_barrier_load(&gpr_now_call_count) -
                   now_calls_at_start_) /
          (double)state.iterations())
      << " allocs/iter:"
      << ((double)(counters_at_end.total_allocs_absolute -
                   counters_at_start_.total_allocs_absolute) /
          (double)state.iterations());
#endif
}