Delay global alerts by 1s for high thresholds
This is a cherry-pick of aosp/735725 with a minor conflict.
By skipping updates if an alert is already scheduled, this avoids firing
the global alert too often on devices with high transfer speeds and high
quota.
Test: with tethering watching videos. Also runtest frameworks-net
Bug: 117243748
Change-Id: Ia0ed76141dfb33546529786eb0118138ef3708c2
Merged-In: Ie0ba5c1d1a2139606e63fcfe46ec77a89accd8d9
Merged-In: Iaabb31586e9e747871a526dc7ebb7deeb65d8f83
diff --git a/services/core/java/com/android/server/net/NetworkStatsService.java b/services/core/java/com/android/server/net/NetworkStatsService.java
index fec510f..9bf3874 100644
--- a/services/core/java/com/android/server/net/NetworkStatsService.java
+++ b/services/core/java/com/android/server/net/NetworkStatsService.java
@@ -159,9 +159,11 @@
static final boolean LOGD = Log.isLoggable(TAG, Log.DEBUG);
static final boolean LOGV = Log.isLoggable(TAG, Log.VERBOSE);
+ // Perform polling and persist all (FLAG_PERSIST_ALL).
private static final int MSG_PERFORM_POLL = 1;
private static final int MSG_UPDATE_IFACES = 2;
- private static final int MSG_REGISTER_GLOBAL_ALERT = 3;
+ // Perform polling, persist network, and register the global alert again.
+ private static final int MSG_PERFORM_POLL_REGISTER_ALERT = 3;
/** Flags to control detail level of poll event. */
private static final int FLAG_PERSIST_NETWORK = 0x1;
@@ -169,6 +171,14 @@
private static final int FLAG_PERSIST_ALL = FLAG_PERSIST_NETWORK | FLAG_PERSIST_UID;
private static final int FLAG_PERSIST_FORCE = 0x100;
+ /**
+ * When global alert quota is high, wait for this delay before processing each polling,
+ * and do not schedule further polls once there is already one queued.
+ * This avoids firing the global alert too often on devices with high transfer speeds and
+ * high quota.
+ */
+ private static final int PERFORM_POLL_DELAY_MS = 1000;
+
private static final String TAG_NETSTATS_ERROR = "netstats_error";
private final Context mContext;
@@ -916,7 +926,7 @@
}
// Create baseline stats
- mHandler.sendMessage(mHandler.obtainMessage(MSG_PERFORM_POLL, FLAG_PERSIST_ALL));
+ mHandler.sendMessage(mHandler.obtainMessage(MSG_PERFORM_POLL));
return normalizedRequest;
}
@@ -1057,13 +1067,12 @@
mContext.enforceCallingOrSelfPermission(CONNECTIVITY_INTERNAL, TAG);
if (LIMIT_GLOBAL_ALERT.equals(limitName)) {
- // kick off background poll to collect network stats; UID stats
- // are handled during normal polling interval.
- final int flags = FLAG_PERSIST_NETWORK;
- mHandler.obtainMessage(MSG_PERFORM_POLL, flags, 0).sendToTarget();
-
- // re-arm global alert for next update
- mHandler.obtainMessage(MSG_REGISTER_GLOBAL_ALERT).sendToTarget();
+ // kick off background poll to collect network stats unless there is already
+ // such a call pending; UID stats are handled during normal polling interval.
+ if (!mHandler.hasMessages(MSG_PERFORM_POLL_REGISTER_ALERT)) {
+ mHandler.sendEmptyMessageDelayed(MSG_PERFORM_POLL_REGISTER_ALERT,
+ PERFORM_POLL_DELAY_MS);
+ }
}
}
};
@@ -1675,15 +1684,15 @@
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MSG_PERFORM_POLL: {
- final int flags = msg.arg1;
- mService.performPoll(flags);
+ mService.performPoll(FLAG_PERSIST_ALL);
return true;
}
case MSG_UPDATE_IFACES: {
mService.updateIfaces(null);
return true;
}
- case MSG_REGISTER_GLOBAL_ALERT: {
+ case MSG_PERFORM_POLL_REGISTER_ALERT: {
+ mService.performPoll(FLAG_PERSIST_NETWORK);
mService.registerGlobalAlert();
return true;
}
