LineageOS/android_packages_modules_Connectivity
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Transition from DEV network stats to XT.

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When XT stats are available, transition to prefer them over DEV,
since they aren't subject to hardware driver bugs.  Only switches at
the first atomic XT bucket, and adds a Settings.Secure flag to force
back to DEV if needed.  Includes tests to cover transition.

Fix tests where device overlay would change which network types
reflected data usage.  Test both history and summary APIs.  Fixed
collection timestamps to reflect full buckets.

Bug: 6504744
Change-Id: Idd7f3b2fdb064c36547c85c51c214fd938c59b7e
This commit is contained in:
Jeff Sharkey
2012-05-16 14:51:19 -07:00
parent 50c921475b
commit 3ddc9b3745
5 changed files with 119 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
services/java/com/android/server/net/NetworkStatsCollection.java
View File

@@ -71,7 +71,7 @@ public class NetworkStatsCollection implements FileRotator.Reader {
private HashMap<Key, NetworkStatsHistory> mStats = Maps.newHashMap();
private long mBucketDuration;
private final long mBucketDuration;
private long mStartMillis;
private long mEndMillis;
@@ -95,6 +95,18 @@ public class NetworkStatsCollection implements FileRotator.Reader {
return mStartMillis;
}
/**
* Return first atomic bucket in this collection, which is more conservative
* than {@link #mStartMillis}.
*/
public long getFirstAtomicBucketMillis() {
if (mStartMillis == Long.MAX_VALUE) {
return Long.MAX_VALUE;
} else {
return mStartMillis + mBucketDuration;
}
}
public long getEndMillis() {
return mEndMillis;
}
@@ -121,6 +133,15 @@ public class NetworkStatsCollection implements FileRotator.Reader {
*/
public NetworkStatsHistory getHistory(
NetworkTemplate template, int uid, int set, int tag, int fields) {
return getHistory(template, uid, set, tag, fields, Long.MIN_VALUE, Long.MAX_VALUE);
}
/**
* Combine all {@link NetworkStatsHistory} in this collection which match
* the requested parameters.
*/
public NetworkStatsHistory getHistory(
NetworkTemplate template, int uid, int set, int tag, int fields, long start, long end) {
final NetworkStatsHistory combined = new NetworkStatsHistory(
mBucketDuration, estimateBuckets(), fields);
for (Map.Entry<Key, NetworkStatsHistory> entry : mStats.entrySet()) {
@@ -128,7 +149,7 @@ public class NetworkStatsCollection implements FileRotator.Reader {
final boolean setMatches = set == SET_ALL || key.set == set;
if (key.uid == uid && setMatches && key.tag == tag
&& templateMatches(template, key.ident)) {
combined.recordEntireHistory(entry.getValue());
combined.recordHistory(entry.getValue(), start, end);
}
}
return combined;
@@ -145,6 +166,9 @@ public class NetworkStatsCollection implements FileRotator.Reader {
final NetworkStats.Entry entry = new NetworkStats.Entry();
NetworkStatsHistory.Entry historyEntry = null;
// shortcut when we know stats will be empty
if (start == end) return stats;
for (Map.Entry<Key, NetworkStatsHistory> mapEntry : mStats.entrySet()) {
final Key key = mapEntry.getKey();
if (templateMatches(template, key.ident)) {
@@ -175,8 +199,9 @@ public class NetworkStatsCollection implements FileRotator.Reader {
*/
public void recordData(NetworkIdentitySet ident, int uid, int set, int tag, long start,
long end, NetworkStats.Entry entry) {
noteRecordedHistory(start, end, entry.rxBytes + entry.txBytes);
findOrCreateHistory(ident, uid, set, tag).recordData(start, end, entry);
final NetworkStatsHistory history = findOrCreateHistory(ident, uid, set, tag);
history.recordData(start, end, entry);
noteRecordedHistory(history.getStart(), history.getEnd(), entry.rxBytes + entry.txBytes);
}
/**

61
services/java/com/android/server/net/NetworkStatsService.java
View File

@@ -44,6 +44,7 @@ import static android.provider.Settings.Secure.NETSTATS_DEV_PERSIST_BYTES;
import static android.provider.Settings.Secure.NETSTATS_DEV_ROTATE_AGE;
import static android.provider.Settings.Secure.NETSTATS_GLOBAL_ALERT_BYTES;
import static android.provider.Settings.Secure.NETSTATS_POLL_INTERVAL;
import static android.provider.Settings.Secure.NETSTATS_REPORT_XT_OVER_DEV;
import static android.provider.Settings.Secure.NETSTATS_SAMPLE_ENABLED;
import static android.provider.Settings.Secure.NETSTATS_TIME_CACHE_MAX_AGE;
import static android.provider.Settings.Secure.NETSTATS_UID_BUCKET_DURATION;
@@ -177,6 +178,7 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
public long getPollInterval();
public long getTimeCacheMaxAge();
public boolean getSampleEnabled();
public boolean getReportXtOverDev();
public static class Config {
public final long bucketDuration;
@@ -221,6 +223,8 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
/** Cached {@link #mDevRecorder} stats. */
private NetworkStatsCollection mDevStatsCached;
/** Cached {@link #mXtRecorder} stats. */
private NetworkStatsCollection mXtStatsCached;
/** Current counter sets for each UID. */
private SparseIntArray mActiveUidCounterSet = new SparseIntArray();
@@ -295,6 +299,7 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
// read historical network stats from disk, since policy service
// might need them right away.
mDevStatsCached = mDevRecorder.getOrLoadCompleteLocked();
mXtStatsCached = mXtRecorder.getOrLoadCompleteLocked();
// bootstrap initial stats to prevent double-counting later
bootstrapStatsLocked();
@@ -371,6 +376,7 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
mUidTagRecorder = null;
mDevStatsCached = null;
mXtStatsCached = null;
mSystemReady = false;
}
@@ -469,12 +475,12 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
@Override
public NetworkStats getSummaryForNetwork(
NetworkTemplate template, long start, long end) {
return mDevStatsCached.getSummary(template, start, end);
return internalGetSummaryForNetwork(template, start, end);
}
@Override
public NetworkStatsHistory getHistoryForNetwork(NetworkTemplate template, int fields) {
return mDevStatsCached.getHistory(template, UID_ALL, SET_ALL, TAG_NONE, fields);
return internalGetHistoryForNetwork(template, fields);
}
@Override
@@ -507,11 +513,56 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
};
}
/**
* Return network summary, splicing between {@link #mDevStatsCached}
* and {@link #mXtStatsCached} when appropriate.
*/
private NetworkStats internalGetSummaryForNetwork(
NetworkTemplate template, long start, long end) {
if (!mSettings.getReportXtOverDev()) {
// shortcut when XT reporting disabled
return mDevStatsCached.getSummary(template, start, end);
}
// splice stats between DEV and XT, switching over from DEV to XT at
// first atomic bucket.
final long firstAtomicBucket = mXtStatsCached.getFirstAtomicBucketMillis();
final NetworkStats dev = mDevStatsCached.getSummary(
template, Math.min(start, firstAtomicBucket), Math.min(end, firstAtomicBucket));
final NetworkStats xt = mXtStatsCached.getSummary(
template, Math.max(start, firstAtomicBucket), Math.max(end, firstAtomicBucket));
xt.combineAllValues(dev);
return xt;
}
/**
* Return network history, splicing between {@link #mDevStatsCached}
* and {@link #mXtStatsCached} when appropriate.
*/
private NetworkStatsHistory internalGetHistoryForNetwork(NetworkTemplate template, int fields) {
if (!mSettings.getReportXtOverDev()) {
// shortcut when XT reporting disabled
return mDevStatsCached.getHistory(template, UID_ALL, SET_ALL, TAG_NONE, fields);
}
// splice stats between DEV and XT, switching over from DEV to XT at
// first atomic bucket.
final long firstAtomicBucket = mXtStatsCached.getFirstAtomicBucketMillis();
final NetworkStatsHistory dev = mDevStatsCached.getHistory(
template, UID_ALL, SET_ALL, TAG_NONE, fields, Long.MIN_VALUE, firstAtomicBucket);
final NetworkStatsHistory xt = mXtStatsCached.getHistory(
template, UID_ALL, SET_ALL, TAG_NONE, fields, firstAtomicBucket, Long.MAX_VALUE);
xt.recordEntireHistory(dev);
return xt;
}
@Override
public long getNetworkTotalBytes(NetworkTemplate template, long start, long end) {
mContext.enforceCallingOrSelfPermission(READ_NETWORK_USAGE_HISTORY, TAG);
assertBandwidthControlEnabled();
return mDevStatsCached.getSummary(template, start, end).getTotalBytes();
return internalGetSummaryForNetwork(template, start, end).getTotalBytes();
}
@Override
@@ -1190,6 +1241,10 @@ public class NetworkStatsService extends INetworkStatsService.Stub {
return getSecureBoolean(NETSTATS_SAMPLE_ENABLED, true);
}
@Override
public boolean getReportXtOverDev() {
return getSecureBoolean(NETSTATS_REPORT_XT_OVER_DEV, true);
}
@Override
public Config getDevConfig() {
return new Config(getSecureLong(NETSTATS_DEV_BUCKET_DURATION, HOUR_IN_MILLIS),
getSecureLong(NETSTATS_DEV_ROTATE_AGE, 15 * DAY_IN_MILLIS),