}
}
sleepNs = -1;
- if (isWarm) {
- if (sec > 0 || nsec > underrunNs) {
- ATRACE_NAME("underrun");
- // FIXME only log occasionally
- ALOGV("underrun: time since last cycle %d.%03ld sec",
- (int) sec, nsec / 1000000L);
- dumpState->mUnderruns++;
- ignoreNextOverrun = true;
- } else if (nsec < overrunNs) {
- if (ignoreNextOverrun) {
- ignoreNextOverrun = false;
- } else {
+ if (isWarm) {
+ if (sec > 0 || nsec > underrunNs) {
+ ATRACE_NAME("underrun");
// FIXME only log occasionally
- ALOGV("overrun: time since last cycle %d.%03ld sec",
+ ALOGV("underrun: time since last cycle %d.%03ld sec",
(int) sec, nsec / 1000000L);
- dumpState->mOverruns++;
+ dumpState->mUnderruns++;
+ ignoreNextOverrun = true;
+ } else if (nsec < overrunNs) {
+ if (ignoreNextOverrun) {
+ ignoreNextOverrun = false;
+ } else {
+ // FIXME only log occasionally
+ ALOGV("overrun: time since last cycle %d.%03ld sec",
+ (int) sec, nsec / 1000000L);
+ dumpState->mOverruns++;
+ }
+ // This forces a minimum cycle time. It:
+ // - compensates for an audio HAL with jitter due to sample rate conversion
+ // - works with a variable buffer depth audio HAL that never pulls at a
+ // rate < than overrunNs per buffer.
+ // - recovers from overrun immediately after underrun
+ // It doesn't work with a non-blocking audio HAL.
+ sleepNs = forceNs - nsec;
+ } else {
+ ignoreNextOverrun = false;
}
- // This forces a minimum cycle time. It:
- // - compensates for an audio HAL with jitter due to sample rate conversion
- // - works with a variable buffer depth audio HAL that never pulls at a rate
- // < than overrunNs per buffer.
- // - recovers from overrun immediately after underrun
- // It doesn't work with a non-blocking audio HAL.
- sleepNs = forceNs - nsec;
- } else {
- ignoreNextOverrun = false;
}
- }
#ifdef FAST_MIXER_STATISTICS
- if (isWarm) {
- // advance the FIFO queue bounds
- size_t i = bounds & (FastMixerDumpState::kSamplingN - 1);
- bounds = (bounds & 0xFFFF0000) | ((bounds + 1) & 0xFFFF);
- if (full) {
- bounds += 0x10000;
- } else if (!(bounds & (FastMixerDumpState::kSamplingN - 1))) {
- full = true;
- }
- // compute the delta value of clock_gettime(CLOCK_MONOTONIC)
- uint32_t monotonicNs = nsec;
- if (sec > 0 && sec < 4) {
- monotonicNs += sec * 1000000000;
- }
- // compute the raw CPU load = delta value of clock_gettime(CLOCK_THREAD_CPUTIME_ID)
- uint32_t loadNs = 0;
- struct timespec newLoad;
- rc = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &newLoad);
- if (rc == 0) {
- if (oldLoadValid) {
- sec = newLoad.tv_sec - oldLoad.tv_sec;
- nsec = newLoad.tv_nsec - oldLoad.tv_nsec;
- if (nsec < 0) {
- --sec;
- nsec += 1000000000;
- }
- loadNs = nsec;
- if (sec > 0 && sec < 4) {
- loadNs += sec * 1000000000;
+ if (isWarm) {
+ // advance the FIFO queue bounds
+ size_t i = bounds & (FastMixerDumpState::kSamplingN - 1);
+ bounds = (bounds & 0xFFFF0000) | ((bounds + 1) & 0xFFFF);
+ if (full) {
+ bounds += 0x10000;
+ } else if (!(bounds & (FastMixerDumpState::kSamplingN - 1))) {
+ full = true;
+ }
+ // compute the delta value of clock_gettime(CLOCK_MONOTONIC)
+ uint32_t monotonicNs = nsec;
+ if (sec > 0 && sec < 4) {
+ monotonicNs += sec * 1000000000;
+ }
+ // compute raw CPU load = delta value of clock_gettime(CLOCK_THREAD_CPUTIME_ID)
+ uint32_t loadNs = 0;
+ struct timespec newLoad;
+ rc = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &newLoad);
+ if (rc == 0) {
+ if (oldLoadValid) {
+ sec = newLoad.tv_sec - oldLoad.tv_sec;
+ nsec = newLoad.tv_nsec - oldLoad.tv_nsec;
+ if (nsec < 0) {
+ --sec;
+ nsec += 1000000000;
+ }
+ loadNs = nsec;
+ if (sec > 0 && sec < 4) {
+ loadNs += sec * 1000000000;
+ }
+ } else {
+ // first time through the loop
+ oldLoadValid = true;
}
- } else {
- // first time through the loop
- oldLoadValid = true;
+ oldLoad = newLoad;
}
- oldLoad = newLoad;
- }
#ifdef CPU_FREQUENCY_STATISTICS
- // get the absolute value of CPU clock frequency in kHz
- int cpuNum = sched_getcpu();
- uint32_t kHz = tcu.getCpukHz(cpuNum);
- kHz = (kHz << 4) | (cpuNum & 0xF);
+ // get the absolute value of CPU clock frequency in kHz
+ int cpuNum = sched_getcpu();
+ uint32_t kHz = tcu.getCpukHz(cpuNum);
+ kHz = (kHz << 4) | (cpuNum & 0xF);
#endif
- // save values in FIFO queues for dumpsys
- // these stores #1, #2, #3 are not atomic with respect to each other,
- // or with respect to store #4 below
- dumpState->mMonotonicNs[i] = monotonicNs;
- dumpState->mLoadNs[i] = loadNs;
+ // save values in FIFO queues for dumpsys
+ // these stores #1, #2, #3 are not atomic with respect to each other,
+ // or with respect to store #4 below
+ dumpState->mMonotonicNs[i] = monotonicNs;
+ dumpState->mLoadNs[i] = loadNs;
#ifdef CPU_FREQUENCY_STATISTICS
- dumpState->mCpukHz[i] = kHz;
+ dumpState->mCpukHz[i] = kHz;
#endif
- // this store #4 is not atomic with respect to stores #1, #2, #3 above, but
- // the newest open and oldest closed halves are atomic with respect to each other
- dumpState->mBounds = bounds;
- ATRACE_INT("cycle_ms", monotonicNs / 1000000);
- ATRACE_INT("load_us", loadNs / 1000);
- }
+ // this store #4 is not atomic with respect to stores #1, #2, #3 above, but
+ // the newest open & oldest closed halves are atomic with respect to each other
+ dumpState->mBounds = bounds;
+ ATRACE_INT("cycle_ms", monotonicNs / 1000000);
+ ATRACE_INT("load_us", loadNs / 1000);
+ }
#endif
} else {
// first time through the loop
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