text: /*
   *
   * Copyright 2017, Google Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #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())
        << " allocs/iter:"
        << ((double)(counters_at_end.total_allocs_absolute -
                     counters_at_start_.total_allocs_absolute) /
            (double)state.iterations());
  #endif
  }
  