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add throttle start and backoff to DS settings

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birarda 2018-11-15 17:28:34 -08:00
parent 35ec0b60ab
commit bb0f046a72
3 changed files with 31 additions and 6 deletions
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15
assignment-client/src/audio/AudioMixer.cpp
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@ -488,11 +488,8 @@ void AudioMixer::throttle(chrono::microseconds duration, int frame) {
// target different mix and backoff ratios (they also have different backoff rates)
// this is to prevent oscillation, and encourage throttling to find a steady state
const float TARGET = 0.9f;
// on a "regular" machine with 100 avatars, this is the largest value where
// - overthrottling can be recovered
// - oscillations will not occur after the recovery
const float BACKOFF_TARGET = 0.44f;
const float TARGET = _throttleStartTarget;
const float BACKOFF_TARGET = _throttleBackoffTarget;
// the mixer is known to struggle at about 80 on a "regular" machine
// so throttle 2/80 the streams to ensure smooth audio (throttling is linear)
@ -551,6 +548,14 @@ void AudioMixer::parseSettingsObject(const QJsonObject& settingsObject) {
_slavePool.setNumThreads(numThreads);
}
}
const QString THROTTLE_START_KEY = "throttle_start";
const QString THROTTLE_BACKOFF_KEY = "throttle_backoff";
_throttleStartTarget = audioThreadingGroupObject[THROTTLE_START_KEY].toDouble(_throttleStartTarget);
_throttleBackoffTarget = audioThreadingGroupObject[THROTTLE_BACKOFF_KEY].toDouble(_throttleBackoffTarget);
qCDebug(audio) << "Throttle Start:" << _throttleStartTarget << "Throttle Backoff:" << _throttleBackoffTarget;
}
if (settingsObject.contains(AUDIO_BUFFER_GROUP_KEY)) {

4
assignment-client/src/audio/AudioMixer.h
View file

@ -144,11 +144,13 @@ private:
static std::map<QString, CodecPluginPointer> _availableCodecs;
static QStringList _codecPreferenceOrder;
static std::vector<ZoneDescription> _audioZones;
static std::vector<ZoneSettings> _zoneSettings;
static std::vector<ReverbSettings> _zoneReverbSettings;
float _throttleStartTarget = 0.9f;
float _throttleBackoffTarget = 0.44f;
AudioMixerSlave::SharedData _workerSharedData;
};

18
domain-server/resources/describe-settings.json
View file

@ -1012,6 +1012,24 @@
"placeholder": "1",
"default": "1",
"advanced": true
},
{
"name": "throttle_start",
"type": "double",
"label": "Throttle Start Target",
"help": "Target percentage of frame time to start throttling",
"placeholder": "0.9",
"default": 0.9,
"advanced": true
},
{
"name": "throttle_backoff",
"type": "double",
"label": "Throttle Backoff Target",
"help": "Target percentage of frame time to backoff throttling",
"placeholder": "0.44",
"default": 0.44,
"advanced": true
}
]
},