diff options
Diffstat (limited to 'services/audioflinger/FastMixer.h')
| -rw-r--r-- | services/audioflinger/FastMixer.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/services/audioflinger/FastMixer.h b/services/audioflinger/FastMixer.h index a6dd310..e2ed553 100644 --- a/services/audioflinger/FastMixer.h +++ b/services/audioflinger/FastMixer.h @@ -64,7 +64,7 @@ struct FastMixerDumpState { FastMixerDumpState(); /*virtual*/ ~FastMixerDumpState(); - void dump(int fd); + void dump(int fd); // should only be called on a stable copy, not the original FastMixerState::Command mCommand; // current command uint32_t mWriteSequence; // incremented before and after each write() @@ -78,12 +78,20 @@ struct FastMixerDumpState { struct timespec mMeasuredWarmupTs; // measured warmup time uint32_t mWarmupCycles; // number of loop cycles required to warmup FastTrackDump mTracks[FastMixerState::kMaxFastTracks]; + #ifdef FAST_MIXER_STATISTICS - // cycle times in seconds - float mMean; - float mMinimum; - float mMaximum; - float mStddev; + // Recently collected samples of per-cycle monotonic time, thread CPU time, and CPU frequency. + // kSamplingN is the size of the sampling frame, and must be a power of 2 <= 0x8000. + static const uint32_t kSamplingN = 0x1000; + // The bounds define the interval of valid samples, and are represented as follows: + // newest open (excluded) endpoint = lower 16 bits of bounds, modulo N + // oldest closed (included) endpoint = upper 16 bits of bounds, modulo N + // Number of valid samples is newest - oldest. + uint32_t mBounds; // bounds for mMonotonicNs, mThreadCpuNs, and mCpukHz + // The elements in the *Ns arrays are in units of nanoseconds <= 3999999999. + uint32_t mMonotonicNs[kSamplingN]; // delta monotonic (wall clock) time + uint32_t mLoadNs[kSamplingN]; // delta CPU load in time + uint32_t mCpukHz[kSamplingN]; // absolute CPU clock frequency in kHz, bits 0-3 are CPU# #endif }; |