grpc/test/cpp/microbenchmarks/helpers.cc

/*
 *
 * 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"

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

void TrackCounters::AddToLabel(std::ostream &out, benchmark::State &state) {
  grpc_stats_data stats_end;
  grpc_stats_collect(&stats_end);
  for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
    out << " " << grpc_stats_counter_name[i] << "/iter:"
        << ((double)(stats_end.counters[i] - stats_begin_.counters[i]) /
            (double)state.iterations());
  }
#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
}