Changeset 105673 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Aug 14, 2024 1:57:57 PM (9 months ago)

Author:

vboxsync

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

164370

Message:

VMM/IEM,TM: Do full-TB looping. Redid timer polling in the recompiler. Rewrote the Blt_CheckIrq code, eliminating a conditional. Fixed some TLB related assertions. Moved some IEMCPU members around in hope of better cache-locality. bugref:10656

File:

• trunk/src/VBox/VMM/VMMR3/IEMR3.cpp (modified) (5 diffs)

trunk/src/VBox/VMM/VMMR3/IEMR3.cpp

@@ -224 +224 @@
         pVCpu->iem.s.DataTlb.NonGlobalLargePageRange.uFirstTag = UINT64_MAX;
         pVCpu->iem.s.DataTlb.GlobalLargePageRange.uFirstTag    = UINT64_MAX;
+#endif
+
+#ifndef VBOX_VMM_TARGET_ARMV8
+        /* Poll timers every 400 us / 2500 Hz. (source: thin air) */
+        pVCpu->iem.s.cNsIdealPollInterval       = 400U * RT_NS_1US;
+        pVCpu->iem.s.cIrqChecksTillNextPoll     = 128;
+        pVCpu->iem.s.cIrqChecksTillNextPollPrev = 128;
 #endif
 
@@ -595 +602 @@
                         "Times threaded TB execution was interrupted/broken off on a call without lookup entries", "/IEM/CPU%u/re/cTbExecThreadedBreaksWithoutLookup", idCpu);
 # endif
+
+        STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.cIrqChecksTillNextPollPrev, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
+                        "Timer polling interval",                       "/IEM/CPU%u/re/cIrqChecksTillNextPollPrev", idCpu);
 
         PIEMTBALLOCATOR const pTbAllocator = pVCpu->iem.s.pTbAllocatorR3;
@@ -648 +658 @@
         STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatCheckIrqBreaks,  STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
                         "TB breaks by CheckIrq",                        "/IEM/CPU%u/re/CheckIrqBreaks", idCpu);
+        STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatCheckTimersBreaks, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
+                        "TB breaks by CheckIrq",                        "/IEM/CPU%u/re/CheckTimersBreaks", idCpu);
         STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatCheckModeBreaks, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
                         "TB breaks by CheckMode",                       "/IEM/CPU%u/re/CheckModeBreaks", idCpu);
@@ -654 +666 @@
         STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatCheckNeedCsLimChecking, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
                         "Needing CS.LIM checking TB after branch or on page crossing", "/IEM/CPU%u/re/CheckTbNeedCsLimChecking", idCpu);
-# ifdef VBOX_WITH_STATISTICS
+
+        STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatTbLoopFullTbDetected, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
+                        "Detected loop full TB",  "/IEM/CPU%u/re/LoopFullTbDetected", idCpu);
         STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatTbLoopInTbDetected, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
                         "Detected loop within TB", "/IEM/CPU%u/re/LoopInTbDetected", idCpu);
-#endif
 
         STAMR3RegisterF(pVM, (void *)&pVCpu->iem.s.StatNativeExecMemInstrBufAllocFailed, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
@@ -883 +896 @@
                         "Number of times the TB finished raising a #XF exception",
                         RAISE_PREFIX "RaiseXf", idCpu);
+
+#  ifdef VBOX_WITH_STATISTICS
+        STAMR3RegisterF(pVM, &pVCpu->iem.s.StatNativeTbExitLoopFullTb, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
+                        "Number of full TB loops.",
+                        "/IEM/CPU%u/re/NativeTbExit/LoopFullTb", idCpu);
+#  endif
 
         STAMR3RegisterF(pVM, &pVCpu->iem.s.StatNativeTbExitDirectLinking1Irq, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,