LineageOS/android_packages_modules_Connectivity
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Introduce network link quality statistics

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This change starts tracking traffic quality data for WiFi and mobile
networks. The quality is tracked based on incidental traffic, and not
on specific measurements. Theoretical bandwidths are hard-coded, as
well as sampling interval; although sampling interval can be changed
by setting a system policy.

Bugs filed to remove shortcomings of this change -

10342372 Change LinkInfo name to something better
10342318 Move hardcoded values of MobileLinkInfo to resources
         so they can be updated without changing code

Bug: 10006249

Change-Id: I83d8c7594da20fe53abbd5e1f909b1f606b035bb
This commit is contained in:
Vinit Deshapnde
2013-08-21 13:09:01 -07:00
parent db5cb48920
commit 30ad254a1e
3 changed files with 194 additions and 3 deletions
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150
services/java/com/android/server/ConnectivityService.java
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@@ -31,6 +31,7 @@ import static android.net.ConnectivityManager.isNetworkTypeValid;
import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL;
import static android.net.NetworkPolicyManager.RULE_REJECT_METERED;
import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
@@ -56,6 +57,7 @@ import android.net.INetworkPolicyManager;
import android.net.INetworkStatsService;
import android.net.LinkAddress;
import android.net.LinkProperties;
import android.net.LinkInfo;
import android.net.LinkProperties.CompareResult;
import android.net.MobileDataStateTracker;
import android.net.NetworkConfig;
@@ -68,6 +70,7 @@ import android.net.NetworkUtils;
import android.net.Proxy;
import android.net.ProxyProperties;
import android.net.RouteInfo;
import android.net.SamplingDataTracker;
import android.net.Uri;
import android.net.wifi.WifiStateTracker;
import android.net.wimax.WimaxManagerConstants;
@@ -144,8 +147,10 @@ import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;
@@ -174,6 +179,23 @@ public class ConnectivityService extends IConnectivityManager.Stub {
private static final String FAIL_FAST_TIME_MS =
"persist.radio.fail_fast_time_ms";
private static final String ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED =
"android.net.ConnectivityService.action.PKT_CNT_SAMPLE_INTERVAL_ELAPSED";
private static final int SAMPLE_INTERVAL_ELAPSED_REQURST_CODE = 0;
private PendingIntent mSampleIntervalElapsedIntent;
// Set network sampling interval at 12 minutes, this way, even if the timers get
// aggregated, it will fire at around 15 minutes, which should allow us to
// aggregate this timer with other timers (specially the socket keep alive timers)
private static final int DEFAULT_SAMPLING_INTERVAL_IN_SECONDS = (VDBG ? 30 : 12 * 60);
// start network sampling a minute after booting ...
private static final int DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS = (VDBG ? 30 : 60);
AlarmManager mAlarmManager;
// used in recursive route setting to add gateways for the host for which
// a host route was requested.
private static final int MAX_HOSTROUTE_CYCLE_COUNT = 10;
@@ -326,6 +348,11 @@ public class ConnectivityService extends IConnectivityManager.Stub {
*/
private static final int EVENT_ENABLE_FAIL_FAST_MOBILE_DATA = 14;
/**
* user internally to indicate that data sampling interval is up
*/
private static final int EVENT_SAMPLE_INTERVAL_ELAPSED = 15;
/** Handler used for internal events. */
private InternalHandler mHandler;
/** Handler used for incoming {@link NetworkStateTracker} events. */
@@ -392,6 +419,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
List mProtectedNetworks;
private DataConnectionStats mDataConnectionStats;
private AtomicInteger mEnableFailFastMobileDataTag = new AtomicInteger(0);
TelephonyManager mTelephonyManager;
@@ -634,6 +662,29 @@ public class ConnectivityService extends IConnectivityManager.Stub {
mDataConnectionStats = new DataConnectionStats(mContext);
mDataConnectionStats.startMonitoring();
// start network sampling ..
Intent intent = new Intent(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED, null);
mSampleIntervalElapsedIntent = PendingIntent.getBroadcast(mContext,
SAMPLE_INTERVAL_ELAPSED_REQURST_CODE, intent, 0);
mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
setAlarm(DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS * 1000, mSampleIntervalElapsedIntent);
IntentFilter filter = new IntentFilter();
filter.addAction(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED);
mContext.registerReceiver(
new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED)) {
mHandler.sendMessage(mHandler.obtainMessage
(EVENT_SAMPLE_INTERVAL_ELAPSED));
}
}
},
new IntentFilter(filter));
mPacManager = new PacManager(mContext);
}
@@ -1911,6 +1962,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
// if (mActiveDefaultNetwork != -1) {
// currentPriority = mNetConfigs[mActiveDefaultNetwork].mPriority;
// }
for (int checkType=0; checkType <= ConnectivityManager.MAX_NETWORK_TYPE; checkType++) {
if (checkType == prevNetType) continue;
if (mNetConfigs[checkType] == null) continue;
@@ -1925,6 +1977,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
// optimization should work and we need to investigate why it doesn't work.
// This could be related to how DEACTIVATE_DATA_CALL is reporting its
// complete before it is really complete.
// if (!mNetTrackers[checkType].isAvailable()) continue;
// if (currentPriority >= mNetConfigs[checkType].mPriority) continue;
@@ -2520,12 +2573,12 @@ public class ConnectivityService extends IConnectivityManager.Stub {
}
/**
/**
* Reads the network specific TCP buffer sizes from SystemProperties
* net.tcp.buffersize.[default|wifi|umts|edge|gprs] and set them for system
* wide use
*/
private void updateNetworkSettings(NetworkStateTracker nt) {
private void updateNetworkSettings(NetworkStateTracker nt) {
String key = nt.getTcpBufferSizesPropName();
String bufferSizes = key == null ? null : SystemProperties.get(key);
@@ -2547,7 +2600,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
}
}
/**
/**
* Writes TCP buffer sizes to /sys/kernel/ipv4/tcp_[r/w]mem_[min/def/max]
* which maps to /proc/sys/net/ipv4/tcp_rmem and tcpwmem
*
@@ -2956,6 +3009,9 @@ public class ConnectivityService extends IConnectivityManager.Stub {
+ " != tag:" + tag);
}
}
case EVENT_SAMPLE_INTERVAL_ELAPSED:
handleNetworkSamplingTimeout();
break;
}
}
}
@@ -4371,4 +4427,92 @@ public class ConnectivityService extends IConnectivityManager.Stub {
}
}
};
@Override
public LinkInfo getLinkInfo(int networkType) {
enforceAccessPermission();
if (isNetworkTypeValid(networkType)) {
return mNetTrackers[networkType].getLinkInfo();
} else {
return null;
}
}
@Override
public LinkInfo getActiveLinkInfo() {
enforceAccessPermission();
if (isNetworkTypeValid(mActiveDefaultNetwork)) {
return mNetTrackers[mActiveDefaultNetwork].getLinkInfo();
} else {
return null;
}
}
@Override
public LinkInfo[] getAllLinkInfo() {
enforceAccessPermission();
final ArrayList<LinkInfo> result = Lists.newArrayList();
for (NetworkStateTracker tracker : mNetTrackers) {
if (tracker != null) {
LinkInfo li = tracker.getLinkInfo();
if (li != null) {
result.add(li);
}
}
}
return result.toArray(new LinkInfo[result.size()]);
}
/* Infrastructure for network sampling */
private void handleNetworkSamplingTimeout() {
log("Sampling interval elapsed, updating statistics ..");
// initialize list of interfaces ..
Map<String, SamplingDataTracker.SamplingSnapshot> mapIfaceToSample =
new HashMap<String, SamplingDataTracker.SamplingSnapshot>();
for (NetworkStateTracker tracker : mNetTrackers) {
if (tracker != null) {
String ifaceName = tracker.getNetworkInterfaceName();
if (ifaceName != null) {
mapIfaceToSample.put(ifaceName, null);
}
}
}
// Read samples for all interfaces
SamplingDataTracker.getSamplingSnapshots(mapIfaceToSample);
// process samples for all networks
for (NetworkStateTracker tracker : mNetTrackers) {
if (tracker != null) {
String ifaceName = tracker.getNetworkInterfaceName();
SamplingDataTracker.SamplingSnapshot ss = mapIfaceToSample.get(ifaceName);
if (ss != null) {
// end the previous sampling cycle
tracker.stopSampling(ss);
// start a new sampling cycle ..
tracker.startSampling(ss);
}
}
}
log("Done.");
int samplingIntervalInSeconds = Settings.Global.getInt(mContext.getContentResolver(),
Settings.Global.CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS,
DEFAULT_SAMPLING_INTERVAL_IN_SECONDS);
if (DBG) log("Setting timer for " + String.valueOf(samplingIntervalInSeconds) + "seconds");
setAlarm(samplingIntervalInSeconds * 1000, mSampleIntervalElapsedIntent);
}
void setAlarm(int timeoutInMilliseconds, PendingIntent intent) {
long wakeupTime = SystemClock.elapsedRealtime() + timeoutInMilliseconds;
mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, wakeupTime, intent);
}
}