Allow extra slop in battery stats

Current slop of 30ms was causing too many WTFs to be thrown. Increase the slop
to 750ms.

Bug: 23391894
Change-Id: Ica5be9b00745bfe58872d43be8c32f8c147075ed

diff --git a/services/core/java/com/android/server/am/BatteryStatsService.java b/services/core/java/com/android/server/am/BatteryStatsService.java
index d0f68f0..322d89d 100644 (file)
--- a/services/core/java/com/android/server/am/BatteryStatsService.java
+++ b/services/core/java/com/android/server/am/BatteryStatsService.java
@@ -1261,8 +1261,8 @@ public final class BatteryStatsService extends IBatteryStats.Stub
                     Slog.v(TAG, "WiFi energy data was reset, new WiFi energy data is " + result);
                 }
 
-                // There is some accuracy error in reports so allow 30 milliseconds of error.
-                final long SAMPLE_ERROR_MILLIS = 30;
+                // There is some accuracy error in reports so allow some slop in the results.
+                final long SAMPLE_ERROR_MILLIS = 750;
                 final long totalTimeMs = result.mControllerIdleTimeMs + result.mControllerRxTimeMs +
                         result.mControllerTxTimeMs;
                 if (totalTimeMs > timePeriodMs + SAMPLE_ERROR_MILLIS) {