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8259886: Improve SSL session cache performance and scalability

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Reviewed-by: erikj, xuelei
This commit is contained in:
djelinski 2021-03-07 01:13:24 +00:00 • committed by Xue-Lei Andrew Fan
parent 3844ce400d
commit 18fc35053c
3 changed files with 150 additions and 1 deletions
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21
src/java.base/share/classes/sun/security/util/Cache.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2002, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -248,6 +248,7 @@ class MemoryCache<K,V> extends Cache<K,V> {
private final Map<K, CacheEntry<K,V>> cacheMap;
private int maxSize;
private long lifetime;
private long nextExpirationTime = Long.MAX_VALUE;
// ReferenceQueue is of type V instead of Cache<K,V>
// to allow SoftCacheEntry to extend SoftReference<V>
@ -317,12 +318,18 @@ class MemoryCache<K,V> extends Cache<K,V> {
}
int cnt = 0;
long time = System.currentTimeMillis();
if (nextExpirationTime > time) {
return;
}
nextExpirationTime = Long.MAX_VALUE;
for (Iterator<CacheEntry<K,V>> t = cacheMap.values().iterator();
t.hasNext(); ) {
CacheEntry<K,V> entry = t.next();
if (entry.isValid(time) == false) {
t.remove();
cnt++;
} else if (nextExpirationTime > entry.getExpirationTime()) {
nextExpirationTime = entry.getExpirationTime();
}
}
if (DEBUG) {
@ -356,6 +363,9 @@ class MemoryCache<K,V> extends Cache<K,V> {
emptyQueue();
long expirationTime = (lifetime == 0) ? 0 :
System.currentTimeMillis() + lifetime;
if (expirationTime < nextExpirationTime) {
nextExpirationTime = expirationTime;
}
CacheEntry<K,V> newEntry = newEntry(key, value, expirationTime, queue);
CacheEntry<K,V> oldEntry = cacheMap.put(key, newEntry);
if (oldEntry != null) {
@ -470,6 +480,7 @@ class MemoryCache<K,V> extends Cache<K,V> {
V getValue();
long getExpirationTime();
}
private static class HardCacheEntry<K,V> implements CacheEntry<K,V> {
@ -492,6 +503,10 @@ class MemoryCache<K,V> extends Cache<K,V> {
return value;
}
public long getExpirationTime() {
return expirationTime;
}
public boolean isValid(long currentTime) {
boolean valid = (currentTime <= expirationTime);
if (valid == false) {
@ -529,6 +544,10 @@ class MemoryCache<K,V> extends Cache<K,V> {
return get();
}
public long getExpirationTime() {
return expirationTime;
}
public boolean isValid(long currentTime) {
boolean valid = (currentTime <= expirationTime) && (get() != null);
if (valid == false) {