Squashed 'third_party/google-benchmark/' content from commit 785e2c3
Change-Id: Iaaca5eca89f717081452e643a233e86425b03e89
git-subtree-dir: third_party/google-benchmark
git-subtree-split: 785e2c3158589e8ef48c59ba80e48d76bdbd8902
diff --git a/src/json_reporter.cc b/src/json_reporter.cc
new file mode 100644
index 0000000..7d01e8e
--- /dev/null
+++ b/src/json_reporter.cc
@@ -0,0 +1,220 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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 "benchmark/benchmark.h"
+#include "complexity.h"
+
+#include <algorithm>
+#include <cstdint>
+#include <iomanip> // for setprecision
+#include <iostream>
+#include <limits>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include "string_util.h"
+#include "timers.h"
+
+namespace benchmark {
+
+namespace {
+
+std::string FormatKV(std::string const& key, std::string const& value) {
+ return StrFormat("\"%s\": \"%s\"", key.c_str(), value.c_str());
+}
+
+std::string FormatKV(std::string const& key, const char* value) {
+ return StrFormat("\"%s\": \"%s\"", key.c_str(), value);
+}
+
+std::string FormatKV(std::string const& key, bool value) {
+ return StrFormat("\"%s\": %s", key.c_str(), value ? "true" : "false");
+}
+
+std::string FormatKV(std::string const& key, int64_t value) {
+ std::stringstream ss;
+ ss << '"' << key << "\": " << value;
+ return ss.str();
+}
+
+std::string FormatKV(std::string const& key, double value) {
+ std::stringstream ss;
+ ss << '"' << key << "\": ";
+
+ const auto max_digits10 = std::numeric_limits<decltype(value)>::max_digits10;
+ const auto max_fractional_digits10 = max_digits10 - 1;
+
+ ss << std::scientific << std::setprecision(max_fractional_digits10) << value;
+ return ss.str();
+}
+
+int64_t RoundDouble(double v) { return static_cast<int64_t>(v + 0.5); }
+
+} // end namespace
+
+bool JSONReporter::ReportContext(const Context& context) {
+ std::ostream& out = GetOutputStream();
+
+ out << "{\n";
+ std::string inner_indent(2, ' ');
+
+ // Open context block and print context information.
+ out << inner_indent << "\"context\": {\n";
+ std::string indent(4, ' ');
+
+ std::string walltime_value = LocalDateTimeString();
+ out << indent << FormatKV("date", walltime_value) << ",\n";
+
+ out << indent << FormatKV("host_name", context.sys_info.name) << ",\n";
+
+ if (Context::executable_name) {
+ // windows uses backslash for its path separator,
+ // which must be escaped in JSON otherwise it blows up conforming JSON
+ // decoders
+ std::string executable_name = Context::executable_name;
+ ReplaceAll(&executable_name, "\\", "\\\\");
+ out << indent << FormatKV("executable", executable_name) << ",\n";
+ }
+
+ CPUInfo const& info = context.cpu_info;
+ out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
+ << ",\n";
+ out << indent
+ << FormatKV("mhz_per_cpu",
+ RoundDouble(info.cycles_per_second / 1000000.0))
+ << ",\n";
+ out << indent << FormatKV("cpu_scaling_enabled", info.scaling_enabled)
+ << ",\n";
+
+ out << indent << "\"caches\": [\n";
+ indent = std::string(6, ' ');
+ std::string cache_indent(8, ' ');
+ for (size_t i = 0; i < info.caches.size(); ++i) {
+ auto& CI = info.caches[i];
+ out << indent << "{\n";
+ out << cache_indent << FormatKV("type", CI.type) << ",\n";
+ out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
+ << ",\n";
+ out << cache_indent
+ << FormatKV("size", static_cast<int64_t>(CI.size) * 1000u) << ",\n";
+ out << cache_indent
+ << FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
+ << "\n";
+ out << indent << "}";
+ if (i != info.caches.size() - 1) out << ",";
+ out << "\n";
+ }
+ indent = std::string(4, ' ');
+ out << indent << "],\n";
+ out << indent << "\"load_avg\": [";
+ for (auto it = info.load_avg.begin(); it != info.load_avg.end();) {
+ out << *it++;
+ if (it != info.load_avg.end()) out << ",";
+ }
+ out << "],\n";
+
+#if defined(NDEBUG)
+ const char build_type[] = "release";
+#else
+ const char build_type[] = "debug";
+#endif
+ out << indent << FormatKV("library_build_type", build_type) << "\n";
+ // Close context block and open the list of benchmarks.
+ out << inner_indent << "},\n";
+ out << inner_indent << "\"benchmarks\": [\n";
+ return true;
+}
+
+void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
+ if (reports.empty()) {
+ return;
+ }
+ std::string indent(4, ' ');
+ std::ostream& out = GetOutputStream();
+ if (!first_report_) {
+ out << ",\n";
+ }
+ first_report_ = false;
+
+ for (auto it = reports.begin(); it != reports.end(); ++it) {
+ out << indent << "{\n";
+ PrintRunData(*it);
+ out << indent << '}';
+ auto it_cp = it;
+ if (++it_cp != reports.end()) {
+ out << ",\n";
+ }
+ }
+}
+
+void JSONReporter::Finalize() {
+ // Close the list of benchmarks and the top level object.
+ GetOutputStream() << "\n ]\n}\n";
+}
+
+void JSONReporter::PrintRunData(Run const& run) {
+ std::string indent(6, ' ');
+ std::ostream& out = GetOutputStream();
+ out << indent << FormatKV("name", run.benchmark_name()) << ",\n";
+ out << indent << FormatKV("run_name", run.run_name) << ",\n";
+ out << indent << FormatKV("run_type", [&run]() -> const char* {
+ switch (run.run_type) {
+ case BenchmarkReporter::Run::RT_Iteration:
+ return "iteration";
+ case BenchmarkReporter::Run::RT_Aggregate:
+ return "aggregate";
+ }
+ BENCHMARK_UNREACHABLE();
+ }()) << ",\n";
+ if (run.run_type == BenchmarkReporter::Run::RT_Aggregate) {
+ out << indent << FormatKV("aggregate_name", run.aggregate_name) << ",\n";
+ }
+ if (run.error_occurred) {
+ out << indent << FormatKV("error_occurred", run.error_occurred) << ",\n";
+ out << indent << FormatKV("error_message", run.error_message) << ",\n";
+ }
+ if (!run.report_big_o && !run.report_rms) {
+ out << indent << FormatKV("iterations", run.iterations) << ",\n";
+ out << indent << FormatKV("real_time", run.GetAdjustedRealTime()) << ",\n";
+ out << indent << FormatKV("cpu_time", run.GetAdjustedCPUTime());
+ out << ",\n"
+ << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
+ } else if (run.report_big_o) {
+ out << indent << FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
+ << ",\n";
+ out << indent << FormatKV("real_coefficient", run.GetAdjustedRealTime())
+ << ",\n";
+ out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
+ out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
+ } else if (run.report_rms) {
+ out << indent << FormatKV("rms", run.GetAdjustedCPUTime());
+ }
+
+ for (auto& c : run.counters) {
+ out << ",\n" << indent << FormatKV(c.first, c.second);
+ }
+
+ if (run.has_memory_result) {
+ out << ",\n" << indent << FormatKV("allocs_per_iter", run.allocs_per_iter);
+ out << ",\n" << indent << FormatKV("max_bytes_used", run.max_bytes_used);
+ }
+
+ if (!run.report_label.empty()) {
+ out << ",\n" << indent << FormatKV("label", run.report_label);
+ }
+ out << '\n';
+}
+
+} // end namespace benchmark