Global Metrics

Spaces Data

Minimal test - lines (141, 246)

Code

class RunningTimes {
 public:
  constexpr RunningTimes() = default;

  // Constructor with only a timestamp, useful when no measurements will be
  // taken.
  constexpr explicit RunningTimes(const mozilla::TimeStamp& aTimeStamp)
      : mPostMeasurementTimeStamp(aTimeStamp) {}

  constexpr void Clear() { *this = RunningTimes{}; }

  constexpr bool IsEmpty() const { return mKnownBits == 0; }

  // This should be called right after CPU measurements have been taken.
  void SetPostMeasurementTimeStamp(const mozilla::TimeStamp& aTimeStamp) {
    mPostMeasurementTimeStamp = aTimeStamp;
  }

  const mozilla::TimeStamp& PostMeasurementTimeStamp() const {
    return mPostMeasurementTimeStamp;
  }

  // Should be filled for any registered thread.

#define RUNNING_TIME_MEMBER(index, name, unit, jsonProperty)          \
  constexpr bool Is##name##unit##Known() const {                      \
    return (mKnownBits & mGot##name##unit) != 0;                      \
  }                                                                   \
                                                                      \
  constexpr void Clear##name##unit() {                                \
    m##name##unit = 0;                                                \
    mKnownBits &= ~mGot##name##unit;                                  \
  }                                                                   \
                                                                      \
  constexpr void Reset##name##unit(uint64_t a##name##unit) {          \
    m##name##unit = a##name##unit;                                    \
    mKnownBits |= mGot##name##unit;                                   \
  }                                                                   \
                                                                      \
  constexpr void Set##name##unit(uint64_t a##name##unit) {            \
    MOZ_ASSERT(!Is##name##unit##Known(), #name #unit " already set"); \
    Reset##name##unit(a##name##unit);                                 \
  }                                                                   \
                                                                      \
  constexpr mozilla::Maybe Get##name##unit() const {        \
    if (Is##name##unit##Known()) {                                    \
      return mozilla::Some(m##name##unit);                            \
    }                                                                 \
    return mozilla::Nothing{};                                        \
  }

  PROFILER_FOR_EACH_RUNNING_TIME(RUNNING_TIME_MEMBER)

#undef RUNNING_TIME_MEMBER

  // Take values from another RunningTimes.
  RunningTimes& TakeFrom(RunningTimes& aOther) {
    if (!aOther.IsEmpty()) {
#define RUNNING_TIME_TAKE(index, name, unit, jsonProperty)   \
  if (aOther.Is##name##unit##Known()) {                      \
    Set##name##unit(std::exchange(aOther.m##name##unit, 0)); \
  }

      PROFILER_FOR_EACH_RUNNING_TIME(RUNNING_TIME_TAKE)

#undef RUNNING_TIME_TAKE

      aOther.mKnownBits = 0;
    }
    return *this;
  }

  // Difference from `aBefore` to `this`. Any unknown makes the result unknown.
  // PostMeasurementTimeStamp set to `this` PostMeasurementTimeStamp, to keep
  // the most recent timestamp associated with the end of the interval over
  // which the difference applies.
  RunningTimes operator-(const RunningTimes& aBefore) const {
    RunningTimes diff;
    diff.mPostMeasurementTimeStamp = mPostMeasurementTimeStamp;
#define RUNNING_TIME_SUB(index, name, unit, jsonProperty)           \
  if (Is##name##unit##Known() && aBefore.Is##name##unit##Known()) { \
    diff.Set##name##unit(m##name##unit - aBefore.m##name##unit);    \
  }

    PROFILER_FOR_EACH_RUNNING_TIME(RUNNING_TIME_SUB)

#undef RUNNING_TIME_SUB
    return diff;
  }

 private:
  friend mozilla::ProfileBufferEntryWriter::Serializer;
  friend mozilla::ProfileBufferEntryReader::Deserializer;

  mozilla::TimeStamp mPostMeasurementTimeStamp;

  uint32_t mKnownBits = 0u;

#define RUNNING_TIME_MEMBER(index, name, unit, jsonProperty) \
  static constexpr uint32_t mGot##name##unit = 1u << index;  \
  uint64_t m##name##unit = 0;

  PROFILER_FOR_EACH_RUNNING_TIME(RUNNING_TIME_MEMBER)

#undef RUNNING_TIME_MEMBER
};

Minimal test - lines (249, 269)

Code

struct mozilla::ProfileBufferEntryWriter::Serializer {
  static Length Bytes(const RunningTimes& aRunningTimes) {
    return ULEB128Size(aRunningTimes.mKnownBits) +
           mozilla::CountPopulation32(aRunningTimes.mKnownBits) *
               sizeof(uint64_t);
  }

  static void Write(ProfileBufferEntryWriter& aEW,
                    const RunningTimes& aRunningTimes) {
    aEW.WriteULEB128(aRunningTimes.mKnownBits);

#define RUNNING_TIME_SERIALIZE(index, name, unit, jsonProperty) \
  if (aRunningTimes.Is##name##unit##Known()) {                  \
    aEW.WriteObject(aRunningTimes.m##name##unit);               \
  }

    PROFILER_FOR_EACH_RUNNING_TIME(RUNNING_TIME_SERIALIZE)

#undef RUNNING_TIME_SERIALIZE
  }
};

Minimal test - lines (272, 298)

Code

struct mozilla::ProfileBufferEntryReader::Deserializer {
  static void ReadInto(ProfileBufferEntryReader& aER,
                       RunningTimes& aRunningTimes) {
    aRunningTimes = Read(aER);
  }

  static RunningTimes Read(ProfileBufferEntryReader& aER) {
    // Start with empty running times, everything is cleared.
    RunningTimes times;

    // This sets all the bits into mKnownBits, we don't need to modify it
    // further.
    times.mKnownBits = aER.ReadULEB128();

    // For each member that should be known, read its value.
#define RUNNING_TIME_DESERIALIZE(index, name, unit, jsonProperty) \
  if (times.Is##name##unit##Known()) {                            \
    aER.ReadIntoObject(times.m##name##unit);                      \
  }

    PROFILER_FOR_EACH_RUNNING_TIME(RUNNING_TIME_DESERIALIZE)

#undef RUNNING_TIME_DESERIALIZE

    return times;
  }
};

Minimal test - lines (77, 79)

Code

struct PlatformDataDestructor {
  void operator()(PlatformData*);
};

Minimal test - lines (85, 87)

Code

namespace mozilla {
class JSONWriter;
}

Minimal test - lines (143, 143)

Code

  constexpr RunningTimes() = default;

Minimal test - lines (48, 50)

Code

namespace mozilla {
struct SymbolTable;
}

Minimal test - lines (73, 73)

Code

class PlatformData;