SF: Add FenceTracker
FenceTracker tracks all fences in SurfaceFlinger. These timestamps
could be used for debugging, profiling, or be exposed to the
application.
Change-Id: I4297a661c0a7530e744168ac7a2a66c4bca92fd5
diff --git a/services/surfaceflinger/FenceTracker.cpp b/services/surfaceflinger/FenceTracker.cpp
new file mode 100644
index 0000000..7da1d93
--- /dev/null
+++ b/services/surfaceflinger/FenceTracker.cpp
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2016 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 <inttypes.h>
+#include "FenceTracker.h"
+#include "Layer.h"
+
+namespace android {
+
+FenceTracker::FenceTracker() :
+ mFrameCounter(0),
+ mOffset(0),
+ mFrames() {}
+
+void FenceTracker::dump(String8* outString) {
+ Mutex::Autolock lock(mMutex);
+ checkFencesForCompletion();
+
+ for (size_t i = 0; i < MAX_FRAME_HISTORY; i++) {
+ int index = (mOffset + i) % MAX_FRAME_HISTORY;
+ const FrameRecord& frame = mFrames[index];
+
+ outString->appendFormat("Frame %" PRIu64 "\n", frame.frameId);
+ outString->appendFormat("- Refresh start\t%" PRId64 "\n",
+ frame.refreshStartTime);
+
+ if (frame.glesCompositionDoneTime) {
+ outString->appendFormat("- GLES done\t%" PRId64 "\n",
+ frame.glesCompositionDoneTime);
+ } else if (frame.glesCompositionDoneFence != Fence::NO_FENCE) {
+ outString->append("- GLES done\tNot signaled\n");
+ }
+ if (frame.retireTime) {
+ outString->appendFormat("- Retire\t%" PRId64 "\n",
+ frame.retireTime);
+ } else {
+ outString->append("- Retire\tNot signaled\n");
+ }
+ for (const auto& kv : frame.layers) {
+ const LayerRecord& layer = kv.second;
+ outString->appendFormat("-- %s\n", layer.name.string());
+ outString->appendFormat("---- Frame # %" PRIu64 " (%s)\n",
+ layer.frameNumber,
+ layer.isGlesComposition ? "GLES" : "HWC");
+ outString->appendFormat("---- Posted\t%" PRId64 "\n",
+ layer.postedTime);
+ if (layer.acquireTime) {
+ outString->appendFormat("---- Acquire\t%" PRId64 "\n",
+ layer.acquireTime);
+ } else {
+ outString->append("---- Acquire\tNot signaled\n");
+ }
+ if (layer.releaseTime) {
+ outString->appendFormat("---- Release\t%" PRId64 "\n",
+ layer.releaseTime);
+ } else {
+ outString->append("---- Release\tNot signaled\n");
+ }
+ }
+ }
+}
+
+static inline bool isValidTimestamp(nsecs_t time) {
+ return time > 0 && time < INT64_MAX;
+}
+
+void FenceTracker::checkFencesForCompletion() {
+ for (auto& frame : mFrames) {
+ if (frame.retireFence != Fence::NO_FENCE) {
+ nsecs_t time = frame.retireFence->getSignalTime();
+ if (isValidTimestamp(time)) {
+ frame.retireTime = time;
+ frame.retireFence = Fence::NO_FENCE;
+ }
+ }
+ if (frame.glesCompositionDoneFence != Fence::NO_FENCE) {
+ nsecs_t time = frame.glesCompositionDoneFence->getSignalTime();
+ if (isValidTimestamp(time)) {
+ frame.glesCompositionDoneTime = time;
+ frame.glesCompositionDoneFence = Fence::NO_FENCE;
+ }
+ }
+ for (auto& kv : frame.layers) {
+ LayerRecord& layer = kv.second;
+ if (layer.acquireFence != Fence::NO_FENCE) {
+ nsecs_t time = layer.acquireFence->getSignalTime();
+ if (isValidTimestamp(time)) {
+ layer.acquireTime = time;
+ layer.acquireFence = Fence::NO_FENCE;
+ }
+ }
+ if (layer.releaseFence != Fence::NO_FENCE) {
+ nsecs_t time = layer.releaseFence->getSignalTime();
+ if (isValidTimestamp(time)) {
+ layer.releaseTime = time;
+ layer.releaseFence = Fence::NO_FENCE;
+ }
+ }
+ }
+ }
+}
+
+void FenceTracker::addFrame(nsecs_t refreshStartTime, sp<Fence> retireFence,
+ const Vector<sp<Layer>>& layers, sp<Fence> glDoneFence) {
+ Mutex::Autolock lock(mMutex);
+ FrameRecord& frame = mFrames[mOffset];
+ FrameRecord& prevFrame = mFrames[(mOffset + MAX_FRAME_HISTORY - 1) %
+ MAX_FRAME_HISTORY];
+ frame.layers.clear();
+
+ bool wasGlesCompositionDone = false;
+ const size_t count = layers.size();
+ for (size_t i = 0; i < count; i++) {
+ String8 name;
+ uint64_t frameNumber;
+ bool glesComposition;
+ nsecs_t postedTime;
+ sp<Fence> acquireFence;
+ sp<Fence> prevReleaseFence;
+ int32_t key = layers[i]->getSequence();
+
+ layers[i]->getFenceData(&name, &frameNumber, &glesComposition,
+ &postedTime, &acquireFence, &prevReleaseFence);
+#ifdef USE_HWC2
+ if (glesComposition) {
+ frame.layers.emplace(std::piecewise_construct,
+ std::forward_as_tuple(key),
+ std::forward_as_tuple(name, frameNumber, glesComposition,
+ postedTime, 0, 0, acquireFence, prevReleaseFence));
+ wasGlesCompositionDone = true;
+ } else {
+ frame.layers.emplace(std::piecewise_construct,
+ std::forward_as_tuple(key),
+ std::forward_as_tuple(name, frameNumber, glesComposition,
+ postedTime, 0, 0, acquireFence, Fence::NO_FENCE));
+
+ auto prevLayer = prevFrame.layers.find(key);
+ if (prevLayer != prevFrame.layers.end()) {
+ prevLayer->second.releaseFence = prevReleaseFence;
+ }
+ }
+#else
+ frame.layers.emplace(std::piecewise_construct,
+ std::forward_as_tuple(key),
+ std::forward_as_tuple(name, frameNumber, glesComposition,
+ postedTime, 0, 0, acquireFence,
+ glesComposition ? Fence::NO_FENCE : prevReleaseFence));
+ if (glesComposition) {
+ wasGlesCompositionDone = true;
+ }
+#endif
+ frame.layers.emplace(std::piecewise_construct,
+ std::forward_as_tuple(key),
+ std::forward_as_tuple(name, frameNumber, glesComposition,
+ postedTime, 0, 0, acquireFence, prevReleaseFence));
+ }
+
+ frame.frameId = mFrameCounter;
+ frame.refreshStartTime = refreshStartTime;
+ frame.retireTime = 0;
+ frame.glesCompositionDoneTime = 0;
+ prevFrame.retireFence = retireFence;
+ frame.retireFence = Fence::NO_FENCE;
+ frame.glesCompositionDoneFence = wasGlesCompositionDone ? glDoneFence :
+ Fence::NO_FENCE;
+
+ mOffset = (mOffset + 1) % MAX_FRAME_HISTORY;
+ mFrameCounter++;
+
+ checkFencesForCompletion();
+}
+
+} // namespace android