Increase tcp polling interval on data stall detection
NetworkMonitor suspects stall if we get high tcp fail rate in
10s. In a cell transition frequently environment, a certain
percentage packets lost or retransmission may stay for a longer
time interval. The shorter tcp polling interval may not able to
get confident enough result. The looser timer may also
increase validated result in the metrics which may not a good
signal. Thus, increase the polling interval to address it.
Bug: 157957111
Test: atest NetworkStackTests
Merged-In: I496a32da8f57f88908402722ebe1cd3d0a8483b6
Change-Id: I496a32da8f57f88908402722ebe1cd3d0a8483b6
diff --git a/src/android/net/util/DataStallUtils.java b/src/android/net/util/DataStallUtils.java
index 3391a71..2c5de57 100644
--- a/src/android/net/util/DataStallUtils.java
+++ b/src/android/net/util/DataStallUtils.java
@@ -96,7 +96,7 @@
/**
* Default polling interval to observe the tcp health.
*/
- public static int DEFAULT_TCP_POLLING_INTERVAL_MS = 10_000;
+ public static int DEFAULT_TCP_POLLING_INTERVAL_MS = 20_000;
/**
* Default tcp packets fail rate to suspect as a data stall.
