Break down jank between frame drops vs. triple buffered
Bug: 70220906
Test: JankyScene vs. systrace vs. jankstats
Change-Id: Ia012685020cc5bcabbd3f92f0bdeb84eaf50733d
diff --git a/libs/hwui/JankTracker.cpp b/libs/hwui/JankTracker.cpp
index cf29e43..8110664 100644
--- a/libs/hwui/JankTracker.cpp
+++ b/libs/hwui/JankTracker.cpp
@@ -129,22 +129,42 @@
totalDuration -= forgiveAmount;
}
}
+
LOG_ALWAYS_FATAL_IF(totalDuration <= 0, "Impossible totalDuration %" PRId64, totalDuration);
mData->reportFrame(totalDuration);
(*mGlobalData)->reportFrame(totalDuration);
- // Keep the fast path as fast as possible.
- if (CC_LIKELY(totalDuration < mFrameInterval)) {
- return;
- }
-
// Only things like Surface.lockHardwareCanvas() are exempt from tracking
- if (frame[FrameInfoIndex::Flags] & EXEMPT_FRAMES_FLAGS) {
+ if (CC_UNLIKELY(frame[FrameInfoIndex::Flags] & EXEMPT_FRAMES_FLAGS)) {
return;
}
- mData->reportJank();
- (*mGlobalData)->reportJank();
+ if (totalDuration > mFrameInterval) {
+ mData->reportJank();
+ (*mGlobalData)->reportJank();
+ }
+
+ bool isTripleBuffered = mSwapDeadline > frame[FrameInfoIndex::IntendedVsync];
+
+ mSwapDeadline = std::max(mSwapDeadline + mFrameInterval,
+ frame[FrameInfoIndex::IntendedVsync] + mFrameInterval);
+
+ // If we hit the deadline, cool!
+ if (frame[FrameInfoIndex::FrameCompleted] < mSwapDeadline) {
+ if (isTripleBuffered) {
+ mData->reportJankType(JankType::kHighInputLatency);
+ (*mGlobalData)->reportJankType(JankType::kHighInputLatency);
+ }
+ return;
+ }
+
+ mData->reportJankType(JankType::kMissedDeadline);
+ (*mGlobalData)->reportJankType(JankType::kMissedDeadline);
+
+ // Janked, reset the swap deadline
+ nsecs_t jitterNanos = frame[FrameInfoIndex::FrameCompleted] - frame[FrameInfoIndex::Vsync];
+ nsecs_t lastFrameOffset = jitterNanos % mFrameInterval;
+ mSwapDeadline = frame[FrameInfoIndex::FrameCompleted] - lastFrameOffset + mFrameInterval;
for (int i = 0; i < NUM_BUCKETS; i++) {
int64_t delta = frame.duration(COMPARISONS[i].start, COMPARISONS[i].end);
diff --git a/libs/hwui/JankTracker.h b/libs/hwui/JankTracker.h
index dc6a7ff..110211e 100644
--- a/libs/hwui/JankTracker.h
+++ b/libs/hwui/JankTracker.h
@@ -75,6 +75,7 @@
std::array<int64_t, NUM_BUCKETS> mThresholds;
int64_t mFrameInterval;
+ nsecs_t mSwapDeadline;
// The amount of time we will erase from the total duration to account
// for SF vsync offsets with HWC2 blocking dequeueBuffers.
// (Vsync + mDequeueBlockTolerance) is the point at which we expect
diff --git a/libs/hwui/ProfileData.cpp b/libs/hwui/ProfileData.cpp
index b392ecd..f9cf549 100644
--- a/libs/hwui/ProfileData.cpp
+++ b/libs/hwui/ProfileData.cpp
@@ -23,8 +23,7 @@
static const char* JANK_TYPE_NAMES[] = {
"Missed Vsync", "High input latency", "Slow UI thread",
- "Slow bitmap uploads", "Slow issue draw commands",
-};
+ "Slow bitmap uploads", "Slow issue draw commands", "Frame deadline missed"};
// The bucketing algorithm controls so to speak
// If a frame is <= to this it goes in bucket 0
diff --git a/libs/hwui/ProfileData.h b/libs/hwui/ProfileData.h
index 1e688ab..564920b 100644
--- a/libs/hwui/ProfileData.h
+++ b/libs/hwui/ProfileData.h
@@ -33,6 +33,7 @@
kSlowUI,
kSlowSync,
kSlowRT,
+ kMissedDeadline,
// must be last
NUM_BUCKETS,
diff --git a/libs/hwui/service/GraphicsStatsService.cpp b/libs/hwui/service/GraphicsStatsService.cpp
index e0303a8..599226b 100644
--- a/libs/hwui/service/GraphicsStatsService.cpp
+++ b/libs/hwui/service/GraphicsStatsService.cpp
@@ -176,6 +176,8 @@
summary->set_slow_bitmap_upload_count(summary->slow_bitmap_upload_count() +
data->jankTypeCount(kSlowSync));
summary->set_slow_draw_count(summary->slow_draw_count() + data->jankTypeCount(kSlowRT));
+ summary->set_missed_deadline_count(summary->missed_deadline_count()
+ + data->jankTypeCount(kMissedDeadline));
bool creatingHistogram = false;
if (proto->histogram_size() == 0) {
@@ -246,6 +248,7 @@
dprintf(fd, "\nNumber Slow UI thread: %d", summary.slow_ui_thread_count());
dprintf(fd, "\nNumber Slow bitmap uploads: %d", summary.slow_bitmap_upload_count());
dprintf(fd, "\nNumber Slow issue draw commands: %d", summary.slow_draw_count());
+ dprintf(fd, "\nNumber Frame deadline missed: %d", summary.missed_deadline_count());
dprintf(fd, "\nHISTOGRAM:");
for (const auto& it : proto->histogram()) {
dprintf(fd, " %dms=%d", it.render_millis(), it.frame_count());
diff --git a/libs/hwui/tests/common/scenes/JankyScene.cpp b/libs/hwui/tests/common/scenes/JankyScene.cpp
new file mode 100644
index 0000000..f5e6b31
--- /dev/null
+++ b/libs/hwui/tests/common/scenes/JankyScene.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+#include "TestSceneBase.h"
+
+#include <unistd.h>
+
+class JankyScene;
+
+static TestScene::Registrar _JankyScene(TestScene::Info{
+ "janky",
+ "A scene that intentionally janks just enough to stay in "
+ "triple buffering.",
+ TestScene::simpleCreateScene<JankyScene>});
+
+class JankyScene : public TestScene {
+public:
+ sp<RenderNode> card;
+
+ void createContent(int width, int height, Canvas& canvas) override {
+ card = TestUtils::createNode(0, 0, 200, 200, [](RenderProperties& props, Canvas& canvas) {
+ canvas.drawColor(0xFF0000FF, SkBlendMode::kSrcOver);
+ });
+ canvas.drawColor(0xFFFFFFFF, SkBlendMode::kSrcOver); // background
+ canvas.drawRenderNode(card.get());
+ }
+
+ void doFrame(int frameNr) override {
+ int curFrame = frameNr % 150;
+ if (curFrame & 1) {
+ usleep(15000);
+ }
+ // we animate left and top coordinates, which in turn animates width and
+ // height (bottom/right coordinates are fixed)
+ card->mutateStagingProperties().setLeftTop(curFrame, curFrame);
+ card->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
+ }
+};
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