| /* |
| * Copyright 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| namespace android { |
| |
| // Jank information tracked by SurfaceFlinger(SF) for perfetto tracing and telemetry. |
| enum JankType { |
| // No Jank |
| None = 0x0, |
| // Jank that occurs in the layers below SurfaceFlinger |
| DisplayHAL = 0x1, |
| // SF took too long on the CPU |
| SurfaceFlingerCpuDeadlineMissed = 0x2, |
| // SF took too long on the GPU |
| SurfaceFlingerGpuDeadlineMissed = 0x4, |
| // Either App or GPU took too long on the frame |
| AppDeadlineMissed = 0x8, |
| // Vsync predictions have drifted beyond the threshold from the actual HWVsync |
| PredictionError = 0x10, |
| // Janks caused due to the time SF was scheduled to work on the frame |
| // Example: SF woke up too early and latched a buffer resulting in an early present |
| SurfaceFlingerScheduling = 0x20, |
| // A buffer is said to be stuffed if it was expected to be presented on a vsync but was |
| // presented later because the previous buffer was presented in its expected vsync. This |
| // usually happens if there is an unexpectedly long frame causing the rest of the buffers |
| // to enter a stuffed state. |
| BufferStuffing = 0x40, |
| // Jank due to unknown reasons. |
| Unknown = 0x80, |
| // SF is said to be stuffed if the previous frame ran longer than expected resulting in the case |
| // where the previous frame was presented in the current frame's expected vsync. This pushes the |
| // current frame to the next vsync. The behavior is similar to BufferStuffing. |
| SurfaceFlingerStuffing = 0x100, |
| }; |
| |
| } // namespace android |
