Warmup cycles must be in range and consecutive (d2123e63) · Commits · e / os / android_frameworks_av

services/audioflinger/FastCapture.cpp

+4 −2

Original line number	Diff line number	Diff line
		@@ -138,13 +138,15 @@ void FastCapture::onStateChange()
		underrunNs = (frameCount * 1750000000LL) / sampleRate; // 1.75
		overrunNs = (frameCount * 500000000LL) / sampleRate; // 0.50
		forceNs = (frameCount * 950000000LL) / sampleRate; // 0.95
		warmupNs = (frameCount * 500000000LL) / sampleRate; // 0.50
		warmupNsMin = (frameCount * 750000000LL) / sampleRate; // 0.75
		warmupNsMax = (frameCount * 1250000000LL) / sampleRate; // 1.25
		} else {
		periodNs = 0;
		underrunNs = 0;
		overrunNs = 0;
		forceNs = 0;
		warmupNs = 0;
		warmupNsMin = 0;
		warmupNsMax = LONG_MAX;
		}
		readBufferState = -1;
		dumpState->mFrameCount = frameCount;

services/audioflinger/FastMixer.cpp

+4 −2

Original line number	Diff line number	Diff line
		@@ -195,13 +195,15 @@ void FastMixer::onStateChange()
		underrunNs = (frameCount * 1750000000LL) / sampleRate; // 1.75
		overrunNs = (frameCount * 500000000LL) / sampleRate; // 0.50
		forceNs = (frameCount * 950000000LL) / sampleRate; // 0.95
		warmupNs = (frameCount * 500000000LL) / sampleRate; // 0.50
		warmupNsMin = (frameCount * 750000000LL) / sampleRate; // 0.75
		warmupNsMax = (frameCount * 1250000000LL) / sampleRate; // 1.25
		} else {
		periodNs = 0;
		underrunNs = 0;
		overrunNs = 0;
		forceNs = 0;
		warmupNs = 0;
		warmupNsMin = 0;
		warmupNsMax = LONG_MAX;
		}
		mMixerBufferState = UNDEFINED;
		#if !LOG_NDEBUG

services/audioflinger/FastThread.cpp

+16 −4

Original line number	Diff line number	Diff line
		@@ -29,7 +29,8 @@

		#define FAST_DEFAULT_NS 999999999L // ~1 sec: default time to sleep
		#define FAST_HOT_IDLE_NS 1000000L // 1 ms: time to sleep while hot idling
		#define MIN_WARMUP_CYCLES 2 // minimum number of loop cycles to wait for warmup
		#define MIN_WARMUP_CYCLES 2 // minimum number of consecutive in-range loop cycles
		// to wait for warmup
		#define MAX_WARMUP_CYCLES 10 // maximum number of loop cycles to wait for warmup

		namespace android {
		@@ -44,7 +45,8 @@ FastThread::FastThread() : Thread(false /canCallJava/),
		underrunNs(0),
		overrunNs(0),
		forceNs(0),
		warmupNs(0),
		warmupNsMin(0),
		warmupNsMax(LONG_MAX),
		// re-initialized to &dummyDumpState by subclass constructor
		mDummyDumpState(NULL),
		dumpState(NULL),
		@@ -60,6 +62,7 @@ FastThread::FastThread() : Thread(false /canCallJava/),
		isWarm(false),
		/* measuredWarmupTs({0, 0}), */
		warmupCycles(0),
		warmupConsecutiveInRangeCycles(0),
		// dummyLogWriter
		logWriter(&dummyLogWriter),
		timestampStatus(INVALID_OPERATION),
		@@ -169,6 +172,7 @@ bool FastThread::threadLoop()
		measuredWarmupTs.tv_sec = 0;
		measuredWarmupTs.tv_nsec = 0;
		warmupCycles = 0;
		warmupConsecutiveInRangeCycles = 0;
		sleepNs = -1;
		coldGen = current->mColdGen;
		#ifdef FAST_MIXER_STATISTICS
		@@ -222,7 +226,8 @@ bool FastThread::threadLoop()
		// To avoid an initial underrun on fast tracks after exiting standby,
		// do not start pulling data from tracks and mixing until warmup is complete.
		// Warmup is considered complete after the earlier of:
		// MIN_WARMUP_CYCLES write() attempts and last one blocks for at least warmupNs
		// MIN_WARMUP_CYCLES consecutive in-range write() attempts,
		// where "in-range" means warmupNsMin <= cycle time <= warmupNsMax
		// MAX_WARMUP_CYCLES write() attempts.
		// This is overly conservative, but to get better accuracy requires a new HAL API.
		if (!isWarm && attemptedWrite) {
		@@ -233,7 +238,14 @@ bool FastThread::threadLoop()
		measuredWarmupTs.tv_nsec -= 1000000000;
		}
		++warmupCycles;
		if ((nsec > warmupNs && warmupCycles >= MIN_WARMUP_CYCLES) \|\|
		if (warmupNsMin <= nsec && nsec <= warmupNsMax) {
		ALOGV("warmup cycle %d in range: %.03f ms", warmupCycles, nsec * 1e-9);
		++warmupConsecutiveInRangeCycles;
		} else {
		ALOGV("warmup cycle %d out of range: %.03f ms", warmupCycles, nsec * 1e-9);
		warmupConsecutiveInRangeCycles = 0;
		}
		if ((warmupConsecutiveInRangeCycles >= MIN_WARMUP_CYCLES) \|\|
		(warmupCycles >= MAX_WARMUP_CYCLES)) {
		isWarm = true;
		dumpState->mMeasuredWarmupTs = measuredWarmupTs;

services/audioflinger/FastThread.h

+4 −2

Original line number	Diff line number	Diff line
		@@ -58,7 +58,8 @@ protected:
		long underrunNs; // underrun likely when write cycle is greater than this value
		long overrunNs; // overrun likely when write cycle is less than this value
		long forceNs; // if overrun detected, force the write cycle to take this much time
		long warmupNs; // warmup complete when write cycle is greater than to this value
		long warmupNsMin; // warmup complete when write cycle is greater than or equal to this value
		long warmupNsMax; // and less than or equal to this value
		FastThreadDumpState *mDummyDumpState;
		FastThreadDumpState *dumpState;
		bool ignoreNextOverrun; // used to ignore initial overrun and first after an underrun
		@@ -74,7 +75,8 @@ protected:
		unsigned coldGen; // last observed mColdGen
		bool isWarm; // true means ready to mix, false means wait for warmup before mixing
		struct timespec measuredWarmupTs; // how long did it take for warmup to complete
		uint32_t warmupCycles; // counter of number of loop cycles required to warmup
		uint32_t warmupCycles; // counter of number of loop cycles during warmup phase
		uint32_t warmupConsecutiveInRangeCycles; // number of consecutive cycles in range
		NBLog::Writer dummyLogWriter;
		NBLog::Writer *logWriter;
		status_t timestampStatus;