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Merge "CPU time min threshold for CpuTimePerUidFreq" into rvc-qpr-dev am: cc3ff5cd59

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12977768

Change-Id: Ie34dcb37362006d5c0ba87c4d6b8139664d2fb9d
This commit is contained in:
TreeHugger Robot
2020-11-09 17:28:40 +00:00
committed by Automerger Merge Worker
parent b224a4ba92 cc3ff5cd59
commit 8a0d6e4667
1 changed files with 8 additions and 1 deletions
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9
services/core/java/com/android/server/stats/pull/StatsPullAtomService.java
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@@ -249,6 +249,13 @@ public class StatsPullAtomService extends SystemService {
// 20% as a conservative estimate.
private static final int MAX_PROCSTATS_RAW_SHARD_SIZE = (int) (MAX_PROCSTATS_SHARD_SIZE * 1.20);
/**
* Threshold to filter out small CPU times at frequency per UID. Those small values appear
* because of more precise accounting in a BPF program. Discarding them reduces the data by at
* least 20% with negligible error.
*/
private static final int MIN_CPU_TIME_PER_UID_FREQ = 10;
private final Object mThermalLock = new Object();
@GuardedBy("mThermalLock")
private IThermalService mThermalService;
@@ -1556,7 +1563,7 @@ public class StatsPullAtomService extends SystemService {
int pullCpuTimePerUidFreqLocked(int atomTag, List<StatsEvent> pulledData) {
mCpuUidFreqTimeReader.readAbsolute((uid, cpuFreqTimeMs) -> {
for (int freqIndex = 0; freqIndex < cpuFreqTimeMs.length; ++freqIndex) {
if (cpuFreqTimeMs[freqIndex] != 0) {
if (cpuFreqTimeMs[freqIndex] >= MIN_CPU_TIME_PER_UID_FREQ) {
StatsEvent e = StatsEvent.newBuilder()
.setAtomId(atomTag)
.writeInt(uid)