Changeset 106101 in vbox for trunk/src/VBox/VMM/include

Timestamp:

Sep 19, 2024 9:16:19 PM (2 months ago)

Author:

vboxsync

Message:

VMM/IEM: More native eflag stats. Added IEMNATIVE_WITH_EFLAGS_POSTPONING config option (no code). bugref:10720

Location:

trunk/src/VBox/VMM/include

Files:

• IEMInternal.h (modified) (2 diffs)
• IEMN8veRecompiler.h (modified) (2 diffs)

trunk/src/VBox/VMM/include/IEMInternal.h

@@ -2363 +2363 @@
     /** Native recompiler: Number of times status flags calc has been skipped. */
     STAMCOUNTER             StatNativeEflSkippedArithmetic;
+    /** Native recompiler: Total number instructions in this category. */
+    STAMCOUNTER             StatNativeEflTotalArithmetic;
+
     /** Native recompiler: Number of times status flags calc has been skipped. */
     STAMCOUNTER             StatNativeEflSkippedLogical;
+    /** Native recompiler: Total number instructions in this category. */
+    STAMCOUNTER             StatNativeEflTotalLogical;
+
+    /** Native recompiler: Number of times status flags calc has been skipped. */
+    STAMCOUNTER             StatNativeEflSkippedShift;
+    /** Native recompiler: Total number instructions in this category. */
+    STAMCOUNTER             StatNativeEflTotalShift;
 
     /** Native recompiler: Number of opportunities to skip EFLAGS.CF updating. */
@@ -2537 +2547 @@
 
 #ifdef IEM_WITH_TLB_TRACE
-    uint64_t                au64Padding[4];
+    //uint64_t                au64Padding[0];
 #else
-    uint64_t                au64Padding[6];
+    uint64_t                au64Padding[2];
 #endif
 

trunk/src/VBox/VMM/include/IEMN8veRecompiler.h

@@ -50 +50 @@
 #if 1 || defined(DOXYGEN_RUNNING)
 # define IEMNATIVE_WITH_LIVENESS_ANALYSIS
-/*# define IEMLIVENESS_EXTENDED_LAYOUT*/
 #endif
 
@@ -69 +68 @@
 # define IEMNATIVE_STRICT_EFLAGS_SKIPPING
 #endif
+
+/** @def IEMNATIVE_WITH_EFLAGS_POSTPONING
+ * Enables delaying EFLAGS calculations/updating to conditional code paths
+ * that are (hopefully) not taken so frequently.
+ *
+ * This can only help with case where there is an conditional
+ * call/exception/tbexit that needs the flag, but in the default code stream the
+ * flag will be clobbered.  Useful for TlbMiss scenarios and sequences of memory
+ * based instructions clobbering status flags. */
+#if defined(IEMNATIVE_WITH_LIVENESS_ANALYSIS) || defined(DOXYGEN_RUNNING)
+# if 0
+#  define IEMNATIVE_WITH_EFLAGS_POSTPONING
+# endif
+#endif
+
+/** @def IEMLIVENESS_EXTENDED_LAYOUT
+ * Enables the extended liveness data layout.  */
+#if defined(IEMNATIVE_WITH_EFLAGS_POSTPONING) || defined(DOXYGEN_RUNNING) || 0
+# define IEMLIVENESS_EXTENDED_LAYOUT
+#endif
+
 
 #ifdef VBOX_WITH_STATISTICS