diff --git a/src/share/back/VirtualMachineImpl.c b/src/share/back/VirtualMachineImpl.c
index fde53c3..1e8b969 100644
--- a/src/share/back/VirtualMachineImpl.c
+++ b/src/share/back/VirtualMachineImpl.c
@@ -34,6 +34,10 @@
 #include "SDE.h"
 #include "FrameID.h"
 
+// ANDROID-CHANGED: Need to sent metrics before doExit
+#include "timing.h"
+
+
 static char *versionName = "Java Debug Wire Protocol (Reference Implementation)";
 static int majorVersion = 1;  /* JDWP major version */
 static int minorVersion = 8;  /* JDWP minor version */
@@ -613,6 +617,10 @@
 static jboolean
 doExit(PacketInputStream *in, PacketOutputStream *out)
 {
+    // ANDROID-CHANGED: We are about to exit(). Send ART cmd processing time,
+    // if there are any remaining.
+    timings_flush();
+
     jint exitCode;
 
     exitCode = inStream_readInt(in);
diff --git a/src/share/back/debugInit.c b/src/share/back/debugInit.c
index 2a1bd21..e31fcf8 100644
--- a/src/share/back/debugInit.c
+++ b/src/share/back/debugInit.c
@@ -43,6 +43,9 @@
 #include "vmDebug.h"
 #include "DDMImpl.h"
 
+// ANDROID-CHANGED: Need to sent metrics before debugInit_exit
+#include "timing.h"
+
 /* How the options get to OnLoad: */
 #define XDEBUG "-Xdebug"
 #define XRUN "-Xrunjdwp"
@@ -1403,6 +1406,10 @@
 {
     enum exit_codes { EXIT_NO_ERRORS = 0, EXIT_JVMTI_ERROR = 1, EXIT_TRANSPORT_ERROR = 2 };
 
+    // ANDROID-CHANGED: We are about to exit(). Send ART cmd processing time,
+    // if there are any remaining.
+    timings_flush();
+
     // Prepare to exit. Log error and finish logging
     LOG_MISC(("Exiting with error %s(%d): %s", jvmtiErrorText(error), error,
                                                ((msg == NULL) ? "" : msg)));
diff --git a/src/share/back/debugLoop.c b/src/share/back/debugLoop.c
index 9d3e9b9..e9e0e58 100644
--- a/src/share/back/debugLoop.c
+++ b/src/share/back/debugLoop.c
@@ -37,6 +37,8 @@
 // ANDROID-CHANGED: Needed for vmDebug_onDisconnect, vmDebug_notifyDebuggerActivityStart &
 // vmDebug_notifyDebuggerActivityEnd.
 #include "vmDebug.h"
+// ANDROID-CHANGED: Needed for sending ART timings
+#include "timing.h"
 
 
 static void JNICALL reader(jvmtiEnv* jvmti_env, JNIEnv* jni_env, void* arg);
@@ -66,6 +68,7 @@
     }
 }
 
+
 void
 debugLoop_initialize(void)
 {
@@ -124,6 +127,11 @@
             PacketOutputStream out;
             CommandHandler func;
 
+            // ANDROID-CHANGED: To be able to send cmd processing time
+            // periodically, we notify the timing system of when they
+            // start. This "startCmd" MUST be paired by a "endCmd".
+            timings_startCmd(cmd->id, cmd->cmdSet, cmd->cmd);
+
             /* Should reply be sent to sender.
              * For error handling, assume yes, since
              * only VM/exit does not reply
@@ -194,6 +202,10 @@
             outStream_destroy(&out);
 
             shouldListen = !lastCommand(cmd);
+
+            // ANDROID-CHANGED: Let the timing system know that the cmd
+            // was fully processed. This may trigger a flush.
+            timings_endCmd();
         }
     }
     threadControl_onDisconnect();
diff --git a/src/share/back/timing.c b/src/share/back/timing.c
new file mode 100644
index 0000000..f49a30f
--- /dev/null
+++ b/src/share/back/timing.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "timing.h"
+
+#include "error_messages.h"
+#include "JDWP.h"
+#include "outStream.h"
+#include "util.h"
+
+// ANDROID-CHANGED: This whole file
+
+// This system stores cmd processing timing and sends them to the debugger
+// to generate profiling stats.
+
+typedef struct Timing {
+    jlong start_ns;
+    jlong duration_ns;
+    jint id;
+    jint cmd_set;
+    jint cmd;
+} Timing;
+
+static const jint MAX_TIMINGS = 500;
+static Timing timings[MAX_TIMINGS];
+static jint numTimings;
+
+void timings_startCmd(jint id, jint cmd_set, jint cmd) {
+  timings[numTimings].id = id;
+  timings[numTimings].cmd_set = cmd_set;
+  timings[numTimings].cmd = cmd;
+  timings[numTimings].start_ns = nsTime();
+}
+
+void timings_endCmd() {
+  timings[numTimings].duration_ns = nsTime() - timings[numTimings].start_ns;
+  numTimings++;
+
+  if (numTimings == MAX_TIMINGS) {
+    timings_flush();
+  }
+}
+
+// Return the size of the ARTT chunk
+static jint getChunkSize() {
+  jint size = 0;
+  size += sizeof(jint); // version
+  size += sizeof(jint); // num timing entries.
+
+  size += numTimings *  (sizeof(jint) * 3 + sizeof(jlong) * 2); // entries
+  return size;
+}
+
+void timings_flush() {
+   // Don't even waste a packet if we know it will contain no payload.
+   if (numTimings == 0) {
+    return;
+   }
+
+   PacketOutputStream packet;
+
+   outStream_initCommand(&packet, uniqueID(), 0, JDWP_COMMAND_SET(DDM),  JDWP_COMMAND(DDM, Chunk));
+
+   outStream_writeInt(&packet, 'A' << 24 | 'R' << 16 | 'T' << 8 | 'T');// DDM chunk type
+   outStream_writeInt(&packet,  getChunkSize()); // DDM chunk length
+
+   outStream_writeInt(&packet, 1); //version
+   outStream_writeInt(&packet, numTimings); // num timing entries
+
+   for(int i=0 ; i < numTimings ; i++) {
+     outStream_writeInt(&packet, timings[i].id);
+     outStream_writeInt(&packet, timings[i].cmd_set);
+     outStream_writeInt(&packet, timings[i].cmd);
+     outStream_writeLong(&packet, timings[i].start_ns);
+     outStream_writeLong(&packet, timings[i].duration_ns);
+   }
+   outStream_sendCommand(&packet);
+   outStream_destroy(&packet);
+
+   numTimings = 0;
+}
+
diff --git a/src/share/back/timing.h b/src/share/back/timing.h
new file mode 100644
index 0000000..478572f
--- /dev/null
+++ b/src/share/back/timing.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef JDWP_ART_METRICS_H
+#define JDWP_ART_METRICS_H
+
+// ANDROID-CHANGED: This whole file
+
+#include <jni.h>
+
+// Currently none of these methods are synchronized since they are only called
+// in the debugLoop thread. If we need to call this from multiple threads in the
+// future, we should add a Lock!
+void timings_startCmd(jint id, jint cmd_set, jint cmd);
+void timings_endCmd();
+void timings_flush();
+
+#endif
\ No newline at end of file
diff --git a/src/share/back/util.c b/src/share/back/util.c
index dcd195d..8aa62f1 100644
--- a/src/share/back/util.c
+++ b/src/share/back/util.c
@@ -50,10 +50,18 @@
 jlong
 milliTime(void)
 {
+    return nsTime() / 1000000L;
+}
+
+// ANDROID-CHANGED: Implement a helper to get the current time in nanoseconds according to
+// CLOCK_MONOTONIC.
+jlong
+nsTime(void)
+{
   struct timespec now;
   memset(&now, 0, sizeof(now));
   (void)clock_gettime(CLOCK_MONOTONIC, &now);
-  return ((jlong)now.tv_sec) * 1000LL + ((jlong)now.tv_nsec) / 1000000LL;
+  return ((jlong)now.tv_sec) * 1000000000LL + ((jlong)now.tv_nsec);
 }
 
 /* Save an object reference for use later (create a NewGlobalRef) */
diff --git a/src/share/back/util.h b/src/share/back/util.h
index b02ad7b..d0b517d 100644
--- a/src/share/back/util.h
+++ b/src/share/back/util.h
@@ -343,6 +343,7 @@
 
 // ANDROID-CHANGED: Helper function to get current time in milliseconds on CLOCK_MONOTONIC
 jlong milliTime(void);
+jlong nsTime(void);
 
 /*
  * Command handling helpers shared among multiple command sets