jank_metric_uma_recorder.cc 3.7 KB

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  1. // Copyright 2021 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. #include "base/android/jank_metric_uma_recorder.h"
  5. #include <cstdint>
  6. #include "base/android/jni_android.h"
  7. #include "base/android/jni_array.h"
  8. #include "base/android/jni_string.h"
  9. #include "base/base_jni_headers/JankMetricUMARecorder_jni.h"
  10. #include "base/metrics/histogram_functions.h"
  11. #include "base/strings/strcat.h"
  12. #include "base/time/time.h"
  13. #include "base/trace_event/base_tracing.h"
  14. #include "base/tracing_buildflags.h"
  15. namespace base {
  16. namespace android {
  17. namespace {
  18. void AddFrameToTrace(int64_t timestamp_ns, int64_t durations_ns) {
  19. #if BUILDFLAG(ENABLE_BASE_TRACING)
  20. if (timestamp_ns < 0)
  21. return;
  22. auto t = perfetto::Track(static_cast<uint64_t>(timestamp_ns));
  23. TRACE_EVENT_BEGIN(
  24. "ui", "AndroidFrameVsync", t, [&](perfetto::EventContext ctx) {
  25. ctx.event()->set_timestamp_absolute_us(timestamp_ns / 1000);
  26. });
  27. TRACE_EVENT_END("ui", t, [&](perfetto::EventContext ctx) {
  28. ctx.event()->set_timestamp_absolute_us((timestamp_ns + durations_ns) /
  29. 1000);
  30. });
  31. #endif // BUILDFLAG(ENABLE_BASE_TRACING)
  32. }
  33. } // namespace
  34. // This function is called from Java with JNI, it's declared in
  35. // base/base_jni_headers/JankMetricUMARecorder_jni.h which is an autogenerated
  36. // header. The actual implementation is in RecordJankMetrics for simpler
  37. // testing.
  38. void JNI_JankMetricUMARecorder_RecordJankMetrics(
  39. JNIEnv* env,
  40. const base::android::JavaParamRef<jstring>& java_scenario_name,
  41. const base::android::JavaParamRef<jlongArray>& java_timestamps_ns,
  42. const base::android::JavaParamRef<jlongArray>& java_durations_ns,
  43. const base::android::JavaParamRef<jlongArray>& java_jank_bursts_ns,
  44. jint java_missed_frames) {
  45. RecordJankMetrics(env, java_scenario_name, java_timestamps_ns,
  46. java_durations_ns, java_jank_bursts_ns, java_missed_frames);
  47. }
  48. void RecordJankMetrics(
  49. JNIEnv* env,
  50. const base::android::JavaParamRef<jstring>& java_scenario_name,
  51. const base::android::JavaParamRef<jlongArray>& java_timestamps_ns,
  52. const base::android::JavaParamRef<jlongArray>& java_durations_ns,
  53. const base::android::JavaParamRef<jlongArray>& java_jank_bursts_ns,
  54. jint java_missed_frames) {
  55. std::string scenario_name = ConvertJavaStringToUTF8(env, java_scenario_name);
  56. std::vector<int64_t> timestamps_ns;
  57. std::vector<int64_t> durations_ns;
  58. std::vector<int64_t> jank_bursts_ns;
  59. JavaLongArrayToInt64Vector(env, java_timestamps_ns, &timestamps_ns);
  60. JavaLongArrayToInt64Vector(env, java_durations_ns, &durations_ns);
  61. JavaLongArrayToInt64Vector(env, java_jank_bursts_ns, &jank_bursts_ns);
  62. std::string frame_duration_histogram_name =
  63. base::StrCat({"Android.Jank.FrameDuration.", scenario_name});
  64. std::string jank_burst_histogram_name =
  65. base::StrCat({"Android.Jank.JankBursts.", scenario_name});
  66. std::string missed_frames_histogram_name =
  67. base::StrCat({"Android.Jank.MissedFrames.", scenario_name});
  68. for (size_t i = 0; i < timestamps_ns.size(); ++i) {
  69. AddFrameToTrace(timestamps_ns[i], durations_ns[i]);
  70. }
  71. for (const int64_t frame_duration_ns : durations_ns) {
  72. base::UmaHistogramTimes(frame_duration_histogram_name,
  73. base::Nanoseconds(frame_duration_ns));
  74. }
  75. for (const int64_t jank_burst_duration_ns : jank_bursts_ns) {
  76. base::UmaHistogramTimes(jank_burst_histogram_name,
  77. base::Nanoseconds(jank_burst_duration_ns));
  78. }
  79. base::UmaHistogramCounts1000(missed_frames_histogram_name,
  80. java_missed_frames);
  81. }
  82. } // namespace android
  83. } // namespace base