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Merge "Adjust wifi idle times to fit in system time period" into nyc-dev am: e1f6975ebc

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am: b1e5b7419b

* commit 'b1e5b7419b5170b0a7bd6723e32d179a31077c80':
  Adjust wifi idle times to fit in system time period

Change-Id: I6f220b7a55f9994dfc04aca94eee3a6531b1f102
This commit is contained in:
Roshan Pius
2016-05-17 23:26:18 +00:00
committed by android-build-merger
parent 648a6437c0 b1e5b7419b
commit 02558c18df
1 changed files with 46 additions and 41 deletions
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87
services/core/java/com/android/server/am/BatteryStatsService.java
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@@ -1323,55 +1323,60 @@ public final class BatteryStatsService extends IBatteryStats.Stub
delta.mTimestamp = latest.getTimeStamp();
delta.mStackState = latest.getStackState();
// These times seem to be the most reliable.
delta.mControllerTxTimeMs = latest.mControllerTxTimeMs - lastTxMs;
delta.mControllerRxTimeMs = latest.mControllerRxTimeMs - lastRxMs;
final long txTimeMs = latest.mControllerTxTimeMs - lastTxMs;
final long rxTimeMs = latest.mControllerRxTimeMs - lastRxMs;
final long idleTimeMs = latest.mControllerIdleTimeMs - lastIdleMs;
// WiFi calculates the idle time as a difference from the on time and the various
// Rx + Tx times. There seems to be some missing time there because this sometimes
// becomes negative. Just cap it at 0 and move on.
// b/21613534
delta.mControllerIdleTimeMs = Math.max(0, latest.mControllerIdleTimeMs - lastIdleMs);
delta.mControllerEnergyUsed = Math.max(0, latest.mControllerEnergyUsed - lastEnergy);
if (delta.mControllerTxTimeMs < 0 || delta.mControllerRxTimeMs < 0) {
if (txTimeMs < 0 || rxTimeMs < 0) {
// The stats were reset by the WiFi system (which is why our delta is negative).
// Returns the unaltered stats.
delta.mControllerEnergyUsed = latest.mControllerEnergyUsed;
delta.mControllerRxTimeMs = latest.mControllerRxTimeMs;
delta.mControllerTxTimeMs = latest.mControllerTxTimeMs;
delta.mControllerIdleTimeMs = latest.mControllerIdleTimeMs;
Slog.v(TAG, "WiFi energy data was reset, new WiFi energy data is " + delta);
}
// There is some accuracy error in reports so allow some slop in the results.
final long SAMPLE_ERROR_MILLIS = 750;
final long totalTimeMs = delta.mControllerIdleTimeMs + delta.mControllerRxTimeMs +
delta.mControllerTxTimeMs;
if (totalTimeMs > timePeriodMs + SAMPLE_ERROR_MILLIS) {
StringBuilder sb = new StringBuilder();
sb.append("Total time ");
TimeUtils.formatDuration(totalTimeMs, sb);
sb.append(" is longer than sample period ");
TimeUtils.formatDuration(timePeriodMs, sb);
sb.append(".\n");
sb.append("Previous WiFi snapshot: ").append("idle=");
TimeUtils.formatDuration(lastIdleMs, sb);
sb.append(" rx=");
TimeUtils.formatDuration(lastRxMs, sb);
sb.append(" tx=");
TimeUtils.formatDuration(lastTxMs, sb);
sb.append(" e=").append(lastEnergy);
sb.append("\n");
sb.append("Current WiFi snapshot: ").append("idle=");
TimeUtils.formatDuration(latest.mControllerIdleTimeMs, sb);
sb.append(" rx=");
TimeUtils.formatDuration(latest.mControllerRxTimeMs, sb);
sb.append(" tx=");
TimeUtils.formatDuration(latest.mControllerTxTimeMs, sb);
sb.append(" e=").append(latest.mControllerEnergyUsed);
Slog.wtf(TAG, sb.toString());
} else {
final long totalActiveTimeMs = txTimeMs + rxTimeMs;
long maxExpectedIdleTimeMs;
// Active time can never be greater than the total time, the stats received seem
// to be corrupt.
if (totalActiveTimeMs > timePeriodMs) {
maxExpectedIdleTimeMs = timePeriodMs;
StringBuilder sb = new StringBuilder();
sb.append("Total Active time ");
TimeUtils.formatDuration(totalActiveTimeMs, sb);
sb.append(" is longer than sample period ");
TimeUtils.formatDuration(timePeriodMs, sb);
sb.append(".\n");
sb.append("Previous WiFi snapshot: ").append("idle=");
TimeUtils.formatDuration(lastIdleMs, sb);
sb.append(" rx=");
TimeUtils.formatDuration(lastRxMs, sb);
sb.append(" tx=");
TimeUtils.formatDuration(lastTxMs, sb);
sb.append(" e=").append(lastEnergy);
sb.append("\n");
sb.append("Current WiFi snapshot: ").append("idle=");
TimeUtils.formatDuration(latest.mControllerIdleTimeMs, sb);
sb.append(" rx=");
TimeUtils.formatDuration(latest.mControllerRxTimeMs, sb);
sb.append(" tx=");
TimeUtils.formatDuration(latest.mControllerTxTimeMs, sb);
sb.append(" e=").append(latest.mControllerEnergyUsed);
Slog.wtf(TAG, sb.toString());
} else {
maxExpectedIdleTimeMs = timePeriodMs - totalActiveTimeMs;
}
// These times seem to be the most reliable.
delta.mControllerTxTimeMs = txTimeMs;
delta.mControllerRxTimeMs = rxTimeMs;
// WiFi calculates the idle time as a difference from the on time and the various
// Rx + Tx times. There seems to be some missing time there because this sometimes
// becomes negative. Just cap it at 0 and ensure that it is less than the expected idle
// time from the difference in timestamps.
// b/21613534
delta.mControllerIdleTimeMs = Math.min(maxExpectedIdleTimeMs, Math.max(0, idleTimeMs));
delta.mControllerEnergyUsed = Math.max(0, latest.mControllerEnergyUsed - lastEnergy);
}
mLastInfo = latest;