Changeset 54215 in vbox for trunk/include

Timestamp:

Feb 16, 2015 12:33:36 PM (10 years ago)

Author:

vboxsync

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

98279

Message:

Runtime,TM: Use GIP's fTscDeltasAreRoughlyInSync.

File:

• trunk/include/VBox/sup.h (modified) (2 diffs)

trunk/include/VBox/sup.h

@@ -439 +439 @@
     ((a_pGip)->u32Mode == SUPGIPMODE_INVARIANT_TSC && !((a_pGip)->fOsTscDeltasInSync))
 
+/** Whether the application of TSC-deltas are worth it (performance matters). */
+#define GIP_TSC_DELTAS_ROUGHLY_IN_SYNC(a_pGip)         ((a_pGip)->fTscDeltasRoughlyInSync)
+
 #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
 /**
@@ -1649 +1652 @@
 DECLINLINE(uint64_t) SUPReadTsc(void)
 {
-    if (GIP_ARE_TSC_DELTAS_APPLICABLE(g_pSUPGlobalInfoPage))
+    if (    GIP_ARE_TSC_DELTAS_APPLICABLE(g_pSUPGlobalInfoPage)
+        && !GIP_TSC_DELTAS_ROUGHLY_IN_SYNC(g_pSUPGlobalInfoPage))
     {
         uint64_t u64Tsc = UINT64_MAX;