Merge "Break down jank between frame drops vs. triple buffered" into pi-dev

core/proto/android/service/graphicsstats.proto

@@ -56,7 +56,7 @@ message GraphicsStatsJankSummaryProto {
     // Number of "missed vsync" events.
     optional int32 missed_vsync_count = 3;
 
-    // Number of "high input latency" events.
+    // Number of frames in triple-buffering scenario (high input latency)
     optional int32 high_input_latency_count = 4;
 
     // Number of "slow UI thread" events.
@@ -67,6 +67,9 @@ message GraphicsStatsJankSummaryProto {
 
     // Number of "slow draw" events.
     optional int32 slow_draw_count = 7;
+
+    // Number of frames that missed their deadline (aka, visibly janked)
+    optional int32 missed_deadline_count = 8;
 }
 
 message GraphicsStatsHistogramBucketProto {

libs/hwui/JankTracker.cpp

@@ -129,22 +129,42 @@ void JankTracker::finishFrame(const FrameInfo& frame) {
             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);

libs/hwui/JankTracker.h

@@ -75,6 +75,7 @@ private:
 
     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

libs/hwui/ProfileData.cpp

@@ -23,8 +23,7 @@ namespace uirenderer {
 
 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

libs/hwui/ProfileData.h

@@ -33,6 +33,7 @@ enum JankType {
     kSlowUI,
     kSlowSync,
     kSlowRT,
+    kMissedDeadline,
 
     // must be last
     NUM_BUCKETS,

libs/hwui/service/GraphicsStatsService.cpp

@@ -176,6 +176,8 @@ bool mergeProfileDataIntoProto(service::GraphicsStatsProto* proto, const std::st
     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 @@ void dumpAsTextToFd(service::GraphicsStatsProto* proto, int fd) {
     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());

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);
+    }
+};