1 // Copyright 2021 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_FUCHSIA_SCHEDULER_H_ 6 #define BASE_FUCHSIA_SCHEDULER_H_ 7 8 #include "base/time/time.h" 9 10 namespace base { 11 12 // Scheduling interval to use for realtime audio threads. 13 // TODO(crbug.com/42050308): Add scheduling period to Thread::Options and remove 14 // this constants. 15 constexpr TimeDelta kAudioSchedulingPeriod = Milliseconds(10); 16 17 // Request 30% max CPU deadline utilization for an audio thread. 18 // TODO(crbug.com/42050235): A different value may need to be used for WebAudio 19 // threads (see media::FuchsiaAudioOutputDevice). A higher capacity may need to 20 // be allocated in that case. 21 constexpr float kAudioSchedulingCapacity = 0.3; 22 23 // Scheduling interval to use for display threads. 24 // TODO(crbug.com/42050308): Add scheduling period to Thread::Options and remove 25 // this constants. 26 constexpr TimeDelta kDisplaySchedulingPeriod = Seconds(1) / 60; 27 28 // Request 50% max CPU deadline utilization for a display thread. 29 // TODO(crbug.com/40750845): Currently DISPLAY priority is not enabled for any 30 // thread on Fuchsia. The value below will need to be fine-tuned when it's 31 // enabled. 32 const float kDisplaySchedulingCapacity = 0.5; 33 34 } // namespace base 35 36 #endif // BASE_FUCHSIA_SCHEDULER_H_ 37