Changeset 82990 in vbox for trunk/src/VBox/VMM/VMMR0

Timestamp:

Feb 5, 2020 11:43:13 AM (5 years ago)

Author:

vboxsync

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

136002

Message:

VMM/GMMR0: Added TLB statistics for GMMR0PageIdToVirt. bugref:9627

Location:

trunk/src/VBox/VMM/VMMR0

Files:

• GMMR0.cpp (modified) (1 diff)
• GMMR0Internal.h (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/GMMR0.cpp

@@ -4558 +4558 @@
         && pTlbe->idGeneration == ASMAtomicUoReadU64(&pGMM->idFreeGeneration)
         && pChunk->Core.Key    == idChunk)
-    { /* hopeful outcome */ }
+        pGVM->R0Stats.gmm.cChunkTlbHits++; /* hopefully this is a likely outcome */
     else
     {
+        pGVM->R0Stats.gmm.cChunkTlbMisses++;
+
+        /*
+         * Look it up in the chunk tree.
+         */
         RTSpinlockAcquire(pGMM->hSpinLockTree);
         pChunk = gmmR0GetChunkLocked(pGMM, idChunk);

trunk/src/VBox/VMM/VMMR0/GMMR0Internal.h

@@ -107 +107 @@
     /** Spinlock protecting the chunk lookup TLB. */
     RTSPINLOCK          hChunkTlbSpinLock;
+    uint64_t            cChunkTlbHits;
+    uint64_t            cChunkTlbMisses;
     /** The chunk lookup TLB used by GMMR0PageIdToVirt. */
     GMMPERVMCHUNKTLBE   aChunkTlbEntries[GMMPERVM_CHUNKTLB_ENTRIES];