Changeset 77380 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Feb 20, 2019 1:40:22 PM (6 years ago)

Author:

vboxsync

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

128931

Message:

VMM: Further improvments on the IEM timer polling by making it fully configurable. Sideeffect is that EMSTATE_IEM_THEN_REM has now become more accurate and will execute fewer instructions (exactly 1024 rather than up to 1023+4096) before switching to REM.

File:

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

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

@@ -1206 +1206 @@
             rc = REMR3Run(pVM, pVCpu);
 #else
-            rc = VBOXSTRICTRC_TODO(IEMExecLots(pVCpu, NULL /*pcInstructions*/));
+            rc = VBOXSTRICTRC_TODO(IEMExecLots(pVCpu, 8192 /*cMaxInstructions*/, 4095 /*cPollRate*/, NULL /*pcInstructions*/));
 #endif
             STAM_PROFILE_STOP(&pVCpu->em.s.StatREMExec, c);
@@ -1374 +1374 @@
     {
         uint32_t     cInstructions;
-        VBOXSTRICTRC rcStrict = IEMExecLots(pVCpu, &cInstructions);
+        VBOXSTRICTRC rcStrict = IEMExecLots(pVCpu, 1024 - pVCpu->em.s.cIemThenRemInstructions /*cMaxInstructions*/,
+                                            UINT32_MAX/2 /*cPollRate*/, &cInstructions);
         pVCpu->em.s.cIemThenRemInstructions += cInstructions;
         if (rcStrict != VINF_SUCCESS)
@@ -2894 +2895 @@
                 case EMSTATE_IEM:
                 {
+                    uint32_t cInstructions = 0;
 #if 0 /* For testing purposes. */
                     STAM_PROFILE_START(&pVCpu->em.s.StatHmExec, x1);
@@ -2902 +2904 @@
                     else if (rc == VERR_EM_CANNOT_EXEC_GUEST)
 #endif
-                        rc = VBOXSTRICTRC_TODO(IEMExecLots(pVCpu, NULL /*pcInstructions*/));
+                        rc = VBOXSTRICTRC_TODO(IEMExecLots(pVCpu, 4096 /*cMaxInstructions*/, 2047 /*cPollRate*/, &cInstructions));
                     if (pVM->em.s.fIemExecutesAll)
                     {
@@ -2908 +2910 @@
                         Assert(rc != VINF_EM_RESCHEDULE_RAW);
                         Assert(rc != VINF_EM_RESCHEDULE_HM);
+#ifdef VBOX_HIGH_RES_TIMERS_HACK
+                        if (cInstructions < 2048)
+                            TMTimerPollVoid(pVM, pVCpu);
+#endif
                     }
                     fFFDone = false;