diff --git a/protos/launcher_trace.proto b/protos/launcher_trace.proto
new file mode 100644
index 0000000..c6f3543
--- /dev/null
+++ b/protos/launcher_trace.proto
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+syntax = "proto2";
+
+package com.android.launcher3.tracing;
+
+option java_multiple_files = true;
+
+message LauncherTraceProto {
+
+    optional TouchInteractionServiceProto touch_interaction_service = 1;
+}
+
+message TouchInteractionServiceProto {
+
+    optional bool service_connected = 1;
+}
diff --git a/protos/launcher_trace_file.proto b/protos/launcher_trace_file.proto
new file mode 100644
index 0000000..6ce182a
--- /dev/null
+++ b/protos/launcher_trace_file.proto
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+syntax = "proto2";
+
+import "launcher_trace.proto";
+
+package com.android.launcher3.tracing;
+
+option java_multiple_files = true;
+
+/* represents a file full of launcher trace entries.
+   Encoded, it should start with 0x9 0x4C 0x4E 0x43 0x48 0x52 0x54 0x52 0x43 (.LNCHRTRC), such
+   that they can be easily identified. */
+message LauncherTraceFileProto {
+
+    /* constant; MAGIC_NUMBER = (long) MAGIC_NUMBER_H << 32 | MagicNumber.MAGIC_NUMBER_L
+       (this is needed because enums have to be 32 bits and there's no nice way to put 64bit
+        constants into .proto files. */
+    enum MagicNumber {
+        INVALID = 0;
+        MAGIC_NUMBER_L = 0x48434E4C;  /* LNCH (little-endian ASCII) */
+        MAGIC_NUMBER_H = 0x43525452;  /* RTRC (little-endian ASCII) */
+    }
+
+    optional fixed64 magic_number = 1;  /* Must be the first field, set to value in MagicNumber */
+    repeated LauncherTraceEntryProto entry = 2;
+}
+
+/* one launcher trace entry. */
+message LauncherTraceEntryProto {
+    /* required: elapsed realtime in nanos since boot of when this entry was logged */
+    optional fixed64 elapsed_realtime_nanos = 1;
+
+    optional LauncherTraceProto launcher = 3;
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
index a597458..28e8fb6 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
@@ -28,6 +28,7 @@
 import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_INPUT_MONITOR;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_SYSUI_PROXY;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_TRACING_ENABLED;
 import static com.android.systemui.shared.system.RemoteAnimationTargetCompat.ACTIVITY_TYPE_ASSISTANT;
 
 import android.annotation.TargetApi;
@@ -63,6 +64,8 @@
 import com.android.launcher3.provider.RestoreDbTask;
 import com.android.launcher3.testing.TestLogging;
 import com.android.launcher3.testing.TestProtocol;
+import com.android.launcher3.tracing.nano.LauncherTraceProto;
+import com.android.launcher3.tracing.nano.TouchInteractionServiceProto;
 import com.android.launcher3.uioverrides.plugins.PluginManagerWrapper;
 import com.android.launcher3.util.TraceHelper;
 import com.android.quickstep.inputconsumers.AccessibilityInputConsumer;
@@ -76,6 +79,7 @@
 import com.android.quickstep.inputconsumers.ScreenPinnedInputConsumer;
 import com.android.quickstep.util.ActiveGestureLog;
 import com.android.quickstep.util.AssistantUtilities;
+import com.android.quickstep.util.ProtoTracer;
 import com.android.systemui.plugins.OverscrollPlugin;
 import com.android.systemui.plugins.PluginListener;
 import com.android.systemui.shared.recents.IOverviewProxy;
@@ -85,6 +89,7 @@
 import com.android.systemui.shared.system.InputConsumerController;
 import com.android.systemui.shared.system.InputMonitorCompat;
 import com.android.systemui.shared.system.RecentsAnimationListener;
+import com.android.systemui.shared.tracing.ProtoTraceable;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -113,7 +118,8 @@
  * Service connected by system-UI for handling touch interaction.
  */
 @TargetApi(Build.VERSION_CODES.Q)
-public class TouchInteractionService extends Service implements PluginListener<OverscrollPlugin> {
+public class TouchInteractionService extends Service implements PluginListener<OverscrollPlugin>,
+        ProtoTraceable<LauncherTraceProto> {
 
     private static final String TAG = "TouchInteractionService";
 
@@ -275,6 +281,7 @@
         mDeviceState = new RecentsAnimationDeviceState(this);
         mDeviceState.addNavigationModeChangedCallback(this::onNavigationModeChanged);
         mDeviceState.runOnUserUnlocked(this::onUserUnlocked);
+        ProtoTracer.INSTANCE.get(this).add(this);
 
         sConnected = true;
     }
@@ -381,6 +388,13 @@
             SystemUiProxy.INSTANCE.get(this).setLastSystemUiStateFlags(
                     mDeviceState.getSystemUiStateFlags());
             mOverviewComponentObserver.onSystemUiStateChanged();
+
+            // Update the tracing state
+            if ((mDeviceState.getSystemUiStateFlags() & SYSUI_STATE_TRACING_ENABLED) != 0) {
+                ProtoTracer.INSTANCE.get(TouchInteractionService.this).start();
+            } else {
+                ProtoTracer.INSTANCE.get(TouchInteractionService.this).stop();
+            }
         }
     }
 
@@ -403,6 +417,8 @@
         disposeEventHandlers();
         mDeviceState.destroy();
         SystemUiProxy.INSTANCE.get(this).setProxy(null);
+        ProtoTracer.INSTANCE.get(TouchInteractionService.this).stop();
+        ProtoTracer.INSTANCE.get(this).remove(this);
 
         sConnected = false;
         super.onDestroy();
@@ -723,6 +739,9 @@
             pw.println("  resumed=" + resumed);
             pw.println("  mConsumer=" + mConsumer.getName());
             ActiveGestureLog.INSTANCE.dump("", pw);
+            pw.println("ProtoTrace:");
+            pw.println("  file="
+                    + ProtoTracer.INSTANCE.get(TouchInteractionService.this).getTraceFile());
         }
     }
 
@@ -781,4 +800,13 @@
     public void onPluginDisconnected(OverscrollPlugin overscrollPlugin) {
         mOverscrollPlugin = null;
     }
+
+    @Override
+    public void writeToProto(LauncherTraceProto proto) {
+        if (proto.touchInteractionService == null) {
+            proto.touchInteractionService = new TouchInteractionServiceProto();
+        }
+        proto.touchInteractionService.serviceConnected = true;
+        proto.touchInteractionService.serviceConnected = true;
+    }
 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/ProtoTracer.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/ProtoTracer.java
new file mode 100644
index 0000000..190763a
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/ProtoTracer.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+package com.android.quickstep.util;
+
+import static com.android.launcher3.tracing.nano.LauncherTraceFileProto.MagicNumber.MAGIC_NUMBER_H;
+import static com.android.launcher3.tracing.nano.LauncherTraceFileProto.MagicNumber.MAGIC_NUMBER_L;
+
+import android.content.Context;
+import android.os.SystemClock;
+
+import com.android.launcher3.tracing.nano.LauncherTraceProto;
+import com.android.launcher3.tracing.nano.LauncherTraceEntryProto;
+import com.android.launcher3.tracing.nano.LauncherTraceFileProto;
+import com.android.launcher3.util.MainThreadInitializedObject;
+import com.android.systemui.shared.tracing.FrameProtoTracer;
+import com.android.systemui.shared.tracing.FrameProtoTracer.ProtoTraceParams;
+import com.android.systemui.shared.tracing.ProtoTraceable;
+import com.google.protobuf.nano.MessageNano;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Queue;
+
+
+/**
+ * Controller for coordinating winscope proto tracing.
+ */
+public class ProtoTracer implements ProtoTraceParams<MessageNano,
+        LauncherTraceFileProto, LauncherTraceEntryProto, LauncherTraceProto> {
+
+    public static final MainThreadInitializedObject<ProtoTracer> INSTANCE =
+            new MainThreadInitializedObject<>(ProtoTracer::new);
+
+    private static final String TAG = "ProtoTracer";
+    private static final long MAGIC_NUMBER_VALUE = ((long) MAGIC_NUMBER_H << 32) | MAGIC_NUMBER_L;
+
+    private final Context mContext;
+    private final FrameProtoTracer<MessageNano,
+            LauncherTraceFileProto, LauncherTraceEntryProto, LauncherTraceProto> mProtoTracer;
+
+    public ProtoTracer(Context context) {
+        mContext = context;
+        mProtoTracer = new FrameProtoTracer<>(this);
+    }
+
+    @Override
+    public File getTraceFile() {
+        return new File(mContext.getFilesDir(), "launcher_trace.pb");
+    }
+
+    @Override
+    public LauncherTraceFileProto getEncapsulatingTraceProto() {
+        return new LauncherTraceFileProto();
+    }
+
+    @Override
+    public LauncherTraceEntryProto updateBufferProto(LauncherTraceEntryProto reuseObj,
+            ArrayList<ProtoTraceable<LauncherTraceProto>> traceables) {
+        LauncherTraceEntryProto proto = reuseObj != null
+                ? reuseObj
+                : new LauncherTraceEntryProto();
+        proto.elapsedRealtimeNanos = SystemClock.elapsedRealtimeNanos();
+        proto.launcher = proto.launcher != null ? proto.launcher : new LauncherTraceProto();
+        for (ProtoTraceable t : traceables) {
+            t.writeToProto(proto.launcher);
+        }
+        return proto;
+    }
+
+    @Override
+    public byte[] serializeEncapsulatingProto(LauncherTraceFileProto encapsulatingProto,
+            Queue<LauncherTraceEntryProto> buffer) {
+        encapsulatingProto.magicNumber = MAGIC_NUMBER_VALUE;
+        encapsulatingProto.entry = buffer.toArray(new LauncherTraceEntryProto[0]);
+        return MessageNano.toByteArray(encapsulatingProto);
+    }
+
+    @Override
+    public byte[] getProtoBytes(MessageNano proto) {
+        return MessageNano.toByteArray(proto);
+    }
+
+    @Override
+    public int getProtoSize(MessageNano proto) {
+        return proto.getCachedSize();
+    }
+
+    public void start() {
+        mProtoTracer.start();
+    }
+
+    public void stop() {
+        mProtoTracer.stop();
+    }
+
+    public void add(ProtoTraceable<LauncherTraceProto> traceable) {
+        mProtoTracer.add(traceable);
+    }
+
+    public void remove(ProtoTraceable<LauncherTraceProto> traceable) {
+        mProtoTracer.remove(traceable);
+    }
+
+    public void scheduleFrameUpdate() {
+        mProtoTracer.scheduleFrameUpdate();
+    }
+
+    public void update() {
+        mProtoTracer.update();
+    }
+}