Changeset 17325 in vbox for trunk/src/VBox/Devices

Timestamp:

Mar 4, 2009 8:44:25 AM (16 years ago)

Author:

vboxsync

Message:

Adjusted recompiler fallback method

Location:

trunk/src/VBox/Devices/Graphics

Files:

• BIOS/vgabios.c (modified) (1 diff)
• DevVGA.cpp (modified) (3 diffs)
• DevVGA.h (modified) (1 diff)

trunk/src/VBox/Devices/Graphics/BIOS/vgabios.c

@@ -670 +670 @@
      // Ralf Brown Interrupt list is WRONG on bh(page)
      // We do output only on the current page !
+#ifdef DEBUG
+     printf("write_teletype %02x\n", GET_AL());
+#endif
+
      biosfn_write_teletype(GET_AL(),0xff,GET_BL(),NO_ATTR);
      break;

trunk/src/VBox/Devices/Graphics/DevVGA.cpp

@@ -1379 +1379 @@
 
 #ifdef IN_RING0
-        if (((++s->cLatchAccesses) & 0x3ff) == 0x3ff)
+        if (((++s->cLatchAccesses) & s->uMaskLatchAccess) == s->uMaskLatchAccess)
         {
+            static uint32_t aMask[5]  = {0x3ff, 0x1ff, 0x7f, 0x3f, 0x1f};
+            static uint64_t aDelta[5]  = {10000000, 5000000, 2500000, 1250000, 625000};
             uint64_t u64CurTime = RTTimeSystemNanoTS();
+
             /* About 1000 (or more) accesses per 10 ms will trigger a reschedule
              * to the recompiler
              */
-            if (u64CurTime - s->u64LastLatchedAccess < 10000000)
+            if (u64CurTime - s->u64LastLatchedAccess < aDelta[s->iMask])
+            {
+                s->u64LastLatchedAccess = 0;
+                s->iMask                = RT_MIN(s->iMask + 1, RT_ELEMENTS(aMask) - 1);
+                s->uMaskLatchAccess     = aMask[s->iMask];
+                s->cLatchAccesses       = s->uMaskLatchAccess - 1;
                 return VINF_EM_RAW_EMULATE_IO_BLOCK;
-
-            s->u64LastLatchedAccess = u64CurTime;            
+            }
+            if (s->u64LastLatchedAccess)
+            {
+                Log2(("Reset mask (was %d) delta %RX64 (limit %x)\n", s->iMask, u64CurTime - s->u64LastLatchedAccess, aDelta[s->iMask]));
+                if (s->iMask) 
+                    s->iMask--;
+                s->uMaskLatchAccess     = aMask[s->iMask];
+            }
+            s->u64LastLatchedAccess = u64CurTime;
         }
 #endif
@@ -5261 +5276 @@
     if (pThis->pDrv)
         pThis->pDrv->pfnReset(pThis->pDrv);
+
+    /* Reset latched access mask. */
+    pThis->uMaskLatchAccess     = 0x3ff;
+    pThis->cLatchAccesses       = 0;
+    pThis->u64LastLatchedAccess = 0;
+
 }
 
@@ -6092 +6113 @@
     STAM_REG(pVM, &pThis->StatR3MemoryWrite,    STAMTYPE_PROFILE, "/Devices/VGA/R3/MMIO-Write", STAMUNIT_TICKS_PER_CALL, "Profiling of the VGAGCMemoryWrite() body.");
 
+    /* Init latched access mask. */
+    pThis->uMaskLatchAccess = 0x3ff;
     return rc;
 }

trunk/src/VBox/Devices/Graphics/DevVGA.h

@@ -304 +304 @@
     uint64_t                    u64LastLatchedAccess;
     uint32_t                    cLatchAccesses;
-    uint32_t                    Padding10;
+    uint16_t                    uMaskLatchAccess;
+    uint16_t                    iMask;
 
 #ifdef VBE_BYTEWISE_IO