text: /*
   *
   * Copyright 2017 gRPC authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  #include "test/cpp/microbenchmarks/helpers.h"
  
  #include <string.h>
  
  static grpc::internal::GrpcLibraryInitializer g_gli_initializer;
  static LibraryInitializer* g_libraryInitializer;
  
  LibraryInitializer::LibraryInitializer() {
    GPR_ASSERT(g_libraryInitializer == nullptr);
    g_libraryInitializer = this;
  
    g_gli_initializer.summon();
  #ifdef GPR_LOW_LEVEL_COUNTERS
    grpc_memory_counters_init();
  #endif
    init_lib_.init();
  }
  
  LibraryInitializer::~LibraryInitializer() {
    g_libraryInitializer = nullptr;
    init_lib_.shutdown();
  }
  
  LibraryInitializer& LibraryInitializer::get() {
    GPR_ASSERT(g_libraryInitializer != nullptr);
    return *g_libraryInitializer;
  }
  
  void TrackCounters::Finish(benchmark::State& state) {
    std::ostringstream out;
    for (const auto& l : labels_) {
      out << l << ' ';
    }
    AddToLabel(out, state);
    std::string label = out.str();
    if (label.length() && label[0] == ' ') {
      label = label.substr(1);
    }
    state.SetLabel(label.c_str());
  }
  
  void TrackCounters::AddLabel(const std::string& label) {
    labels_.push_back(label);
  }
  
  void TrackCounters::AddToLabel(std::ostream& out, benchmark::State& state) {
    // Use the parameters to avoid unused-parameter warnings depending on the
    // #define's present
    (void)out;
    (void)state;
  #ifdef GRPC_COLLECT_STATS
    grpc_stats_data stats_end;
    grpc_stats_collect(&stats_end);
    grpc_stats_data stats;
    grpc_stats_diff(&stats_end, &stats_begin_, &stats);
    for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
      out << " " << grpc_stats_counter_name[i] << "/iter:"
          << (static_cast<double>(stats.counters[i]) /
              static_cast<double>(state.iterations()));
    }
    for (int i = 0; i < GRPC_STATS_HISTOGRAM_COUNT; i++) {
      out << " " << grpc_stats_histogram_name[i] << "-median:"
          << grpc_stats_histo_percentile(&stats, (grpc_stats_histograms)i, 50.0)
          << " " << grpc_stats_histogram_name[i] << "-99p:"
          << grpc_stats_histo_percentile(&stats, (grpc_stats_histograms)i, 99.0);
    }
  #endif
  #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
  }
  