LineageOS/android_packages_modules_Connectivity
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Merge "Use delta reads for per uid traffic stats"

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This commit is contained in:
Chenbo Feng
2019-01-24 18:16:25 +00:00
committed by Gerrit Code Review
parent 63e61c427d a9382c9793
commit 39de2905a5
1 changed files with 26 additions and 9 deletions
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17
core/java/com/android/internal/net/NetworkStatsFactory.java
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@@ -64,6 +64,9 @@ public class NetworkStatsFactory {
private boolean mUseBpfStats;
// A persistent Snapshot since device start for eBPF stats
private final NetworkStats mPersistSnapshot;
// TODO: only do adjustments in NetworkStatsService and remove this.
/**
* (Stacked interface) -> (base interface) association for all connected ifaces since boot.
@@ -135,6 +138,7 @@ public class NetworkStatsFactory {
mStatsXtIfaceFmt = new File(procRoot, "net/xt_qtaguid/iface_stat_fmt");
mStatsXtUid = new File(procRoot, "net/xt_qtaguid/stats");
mUseBpfStats = useBpfStats;
mPersistSnapshot = new NetworkStats(SystemClock.elapsedRealtime(), -1);
}
public NetworkStats readBpfNetworkStatsDev() throws IOException {
@@ -268,6 +272,7 @@ public class NetworkStatsFactory {
return stats;
}
// TODO: delete the lastStats parameter
private NetworkStats readNetworkStatsDetailInternal(int limitUid, String[] limitIfaces,
int limitTag, NetworkStats lastStats) throws IOException {
if (USE_NATIVE_PARSING) {
@@ -278,6 +283,17 @@ public class NetworkStatsFactory {
} else {
stats = new NetworkStats(SystemClock.elapsedRealtime(), -1);
}
if (mUseBpfStats) {
if (nativeReadNetworkStatsDetail(stats, mStatsXtUid.getAbsolutePath(), UID_ALL,
null, TAG_ALL, mUseBpfStats) != 0) {
throw new IOException("Failed to parse network stats");
}
mPersistSnapshot.setElapsedRealtime(stats.getElapsedRealtime());
mPersistSnapshot.combineAllValues(stats);
NetworkStats result = mPersistSnapshot.clone();
result.filter(limitUid, limitIfaces, limitTag);
return result;
} else {
if (nativeReadNetworkStatsDetail(stats, mStatsXtUid.getAbsolutePath(), limitUid,
limitIfaces, limitTag, mUseBpfStats) != 0) {
throw new IOException("Failed to parse network stats");
@@ -288,6 +304,7 @@ public class NetworkStatsFactory {
assertEquals(javaStats, stats);
}
return stats;
}
} else {
return javaReadNetworkStatsDetail(mStatsXtUid, limitUid, limitIfaces, limitTag);
}