Changeset 24621 in vbox for trunk/src/VBox/VMM/PDMAsyncCompletionFileInternal.h

Timestamp:

Nov 12, 2009 7:05:01 PM (15 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

54772

Message:

AsyncCompletion: Implement new caching using the 2Q algorithm

File:

• trunk/src/VBox/VMM/PDMAsyncCompletionFileInternal.h (modified) (3 diffs)

trunk/src/VBox/VMM/PDMAsyncCompletionFileInternal.h

@@ -33 +33 @@
 
 #include "PDMAsyncCompletionInternal.h"
+
+/** Enable the 2Q cache alogrithm. */
+#define VBOX_WITH_2Q_CACHE 1
 
 /** @todo: Revise the caching of tasks. We have currently four caches:
@@ -275 +278 @@
     /** Critical section protecting the cache. */
     RTCRITSECT       CritSect;
+#ifdef VBOX_WITH_2Q_CACHE
+    uint32_t         cbRecentlyUsedInMax;
+    uint32_t         cbRecentlyUsedOutMax;
+    PDMACFILELRULIST LruRecentlyUsedIn;
+    PDMACFILELRULIST LruRecentlyUsedOut;
+    PDMACFILELRULIST LruFrequentlyUsed;
+#else
     /** Adaption parameter (p) */
     uint32_t         uAdaptVal;
@@ -285 +295 @@
     /** LRU list for evicted entries from T2 (B2) */
     PDMACFILELRULIST LruFrequentlyGhost;
+#endif
 #ifdef VBOX_WITH_STATISTICS
     /** Hit counter. */