Initial attempt at jank-tracking stat collection

Is a bit naive, perhaps overly aggressive, but sorta works

Change-Id: I01a774e00dbe681439c02557d9728ae43c45ce50

1 files changed, 68 insertions, 0 deletions

diff --git a/libs/hwui/JankTracker.h b/libs/hwui/JankTracker.h
new file mode 100644
index 0000000..aa554cd
--- /dev/null
+++ b/libs/hwui/JankTracker.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+#ifndef JANKTRACKER_H_
+#define JANKTRACKER_H_
+
+#include "FrameInfo.h"
+#include "renderthread/TimeLord.h"
+#include "utils/RingBuffer.h"
+
+#include <memory>
+
+namespace android {
+namespace uirenderer {
+
+enum JankType {
+    kMissedVsync = 0,
+    kHighInputLatency,
+    kSlowUI,
+    kSlowSync,
+    kSlowRT,
+
+    // must be last
+    NUM_BUCKETS,
+};
+
+struct JankBucket {
+    // Number of frames that hit this bucket
+    uint32_t count;
+};
+
+// TODO: Replace DrawProfiler with this
+class JankTracker {
+public:
+    JankTracker(nsecs_t frameIntervalNanos);
+
+    void setFrameInterval(nsecs_t frameIntervalNanos);
+
+    void addFrame(const FrameInfo& frame);
+
+    void dump(int fd);
+    void reset();
+
+private:
+    JankBucket mBuckets[NUM_BUCKETS];
+    int64_t mThresholds[NUM_BUCKETS];
+
+    int64_t mFrameInterval;
+    uint32_t mTotalFrameCount;
+    uint32_t mJankFrameCount;
+};
+
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* JANKTRACKER_H_ */