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Merge "Add performance counters to cacheinfo dumps." into rvc-dev

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This commit is contained in:
Collin Fijalkovich
2020-05-27 18:24:04 +00:00
committed by Android (Google) Code Review
parent 0093603809 88aa314afa
commit 4edffac782
1 changed files with 25 additions and 0 deletions
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25
core/java/android/app/PropertyInvalidatedCache.java
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@@ -188,6 +188,17 @@ public abstract class PropertyInvalidatedCache<Query, Result> {
private static final boolean DEBUG = false;
private static final boolean VERIFY = false;
// Per-Cache performance counters. As some cache instances are declared static,
@GuardedBy("mLock")
private long mHits = 0;
@GuardedBy("mLock")
private long mMisses = 0;
// Most invalidation is done in a static context, so the counters need to be accessible.
@GuardedBy("sCorkLock")
private static final HashMap<String, Long> sInvalidates = new HashMap<>();
/**
* If sEnabled is false then all cache operations are stubbed out. Set
* it to false inside test processes.
@@ -265,6 +276,7 @@ public abstract class PropertyInvalidatedCache<Query, Result> {
};
synchronized (sCorkLock) {
sCaches.put(this, null);
sInvalidates.put(propertyName, (long) 0);
}
}
@@ -365,6 +377,8 @@ public abstract class PropertyInvalidatedCache<Query, Result> {
synchronized (mLock) {
if (currentNonce == mLastSeenNonce) {
cachedResult = mCache.get(query);
if (cachedResult != null) mHits++;
} else {
if (DEBUG) {
Log.d(TAG,
@@ -428,6 +442,7 @@ public abstract class PropertyInvalidatedCache<Query, Result> {
if (mLastSeenNonce == currentNonce && result != null) {
mCache.put(query, result);
}
mMisses++;
}
return maybeCheckConsistency(query, result);
}
@@ -531,6 +546,8 @@ public abstract class PropertyInvalidatedCache<Query, Result> {
newValueString));
}
SystemProperties.set(name, newValueString);
long invalidateCount = sInvalidates.getOrDefault(name, (long) 0);
sInvalidates.put(name, ++invalidateCount);
}
/**
@@ -758,8 +775,16 @@ public abstract class PropertyInvalidatedCache<Query, Result> {
}
private void dumpContents(PrintWriter pw, String[] args) {
long invalidateCount;
synchronized (sCorkLock) {
invalidateCount = sInvalidates.getOrDefault(mPropertyName, (long) 0);
}
synchronized (mLock) {
pw.println(String.format(" Cache Property Name: %s", cacheName()));
pw.println(String.format(" Hits: %d, Misses: %d, Invalidates: %d",
mHits, mMisses, invalidateCount));
pw.println(String.format(" Last Observed Nonce: %d", mLastSeenNonce));
pw.println(String.format(" Current Size: %d, Max Size: %d",
mCache.entrySet().size(), mMaxEntries));