Memory tracking is now handled by a service.

Multiple processes may be tracked and viewed simultaneously.

Also, some changes to the graph:
  * show uss and pss together
  * adjust opacity controls

Change-Id: I20eebaa8cc8faf78b46af2a35d71ee538207f02b

1 files changed, 158 insertions, 0 deletions

diff --git a/src/com/android/launcher3/MemoryTracker.java b/src/com/android/launcher3/MemoryTracker.java
new file mode 100644
index 000000000..600344e50
--- /dev/null
+++ b/src/com/android/launcher3/MemoryTracker.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2013 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.launcher3;
+
+import android.app.ActivityManager;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.*;
+import android.util.Log;
+import android.util.LongSparseArray;
+
+import java.util.ArrayList;
+
+public class MemoryTracker extends Service {
+    public static final String TAG = MemoryTracker.class.getSimpleName();
+    public static final String ACTION_START_TRACKING = "com.android.launcher3.action.START_TRACKING";
+
+    private static final long UPDATE_RATE = 5000;
+
+    private static final int MSG_START = 1;
+    private static final int MSG_STOP = 2;
+    private static final int MSG_UPDATE = 3;
+
+    public static class ProcessMemInfo {
+        public int pid;
+        public String name;
+        public long currentPss, currentUss;
+        public long[] pss = new long[256];
+        public long[] uss = new long[256];
+            //= new Meminfo[(int) (30 * 60 / (UPDATE_RATE / 1000))]; // 30 minutes
+        public long max = 1;
+        public int head = 0;
+        public ProcessMemInfo(int pid, String name) {
+            this.pid = pid;
+            this.name = name;
+        }
+    };
+    public final LongSparseArray<ProcessMemInfo> mData = new LongSparseArray<ProcessMemInfo>();
+    public final ArrayList<Long> mPids = new ArrayList<Long>();
+    private int[] mPidsArray = new int[0];
+
+    Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message m) {
+            switch (m.what) {
+                case MSG_START:
+                    mHandler.removeMessages(MSG_UPDATE);
+                    mHandler.sendEmptyMessage(MSG_UPDATE);
+                    break;
+                case MSG_STOP:
+                    mHandler.removeMessages(MSG_UPDATE);
+                    break;
+                case MSG_UPDATE:
+                    update();
+                    mHandler.removeMessages(MSG_UPDATE);
+                    mHandler.sendEmptyMessageDelayed(MSG_UPDATE, UPDATE_RATE);
+                    break;
+            }
+        }
+    };
+
+    ActivityManager mAm;
+
+    public ProcessMemInfo getMemInfo(int pid) {
+        return mData.get(pid);
+    }
+
+    public int[] getTrackedProcesses() {
+        return mPidsArray;
+    }
+
+    public void startTrackingProcess(int pid, String name) {
+        mPids.add(new Long(pid));
+        final int N = mPids.size();
+        mPidsArray = new int[N];
+        StringBuffer sb = new StringBuffer("Now tracking processes: ");
+        for (int i=0; i<N; i++) {
+            final int p = mPids.get(i).intValue();
+            mPidsArray[i] = p;
+            sb.append(p); sb.append(" ");
+        }
+        mData.put(pid, new ProcessMemInfo(pid, name));
+        Log.v(TAG, sb.toString());
+    }
+
+    void update() {
+        Debug.MemoryInfo[] dinfos = mAm.getProcessMemoryInfo(mPidsArray);
+        for (int i=0; i<dinfos.length; i++) {
+            Debug.MemoryInfo dinfo = dinfos[i];
+            final long pid = mPids.get(i).intValue();
+            final ProcessMemInfo info = mData.get(pid);
+            info.head = (info.head+1) % info.pss.length;
+            info.pss[info.head] = info.currentPss = dinfo.getTotalPss();
+            info.uss[info.head] = info.currentUss = dinfo.getTotalPrivateDirty();
+            if (info.currentPss > info.max) info.max = info.currentPss;
+            if (info.currentUss > info.max) info.max = info.currentUss;
+            //Log.v(TAG, "update: pid " + pid + " pss=" + info.currentPss + " uss=" + info.currentUss);
+        }
+
+        // XXX: notify listeners
+    }
+
+    @Override
+    public void onCreate() {
+        mAm = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
+    }
+
+    @Override
+    public void onDestroy() {
+        mHandler.sendEmptyMessage(MSG_STOP);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Log.i(TAG, "Received start id " + startId + ": " + intent);
+
+        if (ACTION_START_TRACKING.equals(intent.getAction())) {
+            final Uri uri = intent.getData();
+            final int pid = intent.getIntExtra("pid", -1);
+            final String name = intent.getStringExtra("name");
+            startTrackingProcess(pid, name);
+        }
+
+        mHandler.sendEmptyMessage(MSG_START);
+
+        return START_STICKY;
+    }
+
+    public class MemoryTrackerInterface extends Binder {
+        MemoryTracker getService() {
+            return MemoryTracker.this;
+        }
+    }
+
+    private final IBinder mBinder = new MemoryTrackerInterface();
+
+    public IBinder onBind(Intent intent) {
+        mHandler.sendEmptyMessage(MSG_START);
+
+        return mBinder;
+    }
+}