Changeset 22257 in vbox for trunk/src/VBox/VMM

Timestamp:

Aug 14, 2009 12:45:12 PM (15 years ago)

Author:

vboxsync

Message:

Guestimate too high; was still seeing decreasing rdtsc values

Location:

trunk/src/VBox/VMM/VMMR0

Files:

• HWSVMR0.cpp (modified) (1 diff)
• HWVMXR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HWSVMR0.cpp

@@ -1264 +1264 @@
     /* Possibly the last TSC value seen by the guest (too high) (only when we're in tsc offset mode). */
     if (!(pVMCB->ctrl.u32InterceptCtrl1 & SVM_CTRL1_INTERCEPT_RDTSC))
-        TMCpuTickSetLastSeen(pVCpu, ASMReadTSC() + pVMCB->ctrl.u64TSCOffset - 0x1000 /* guestimate of world switch overhead in clock ticks */);
+        TMCpuTickSetLastSeen(pVCpu, ASMReadTSC() + pVMCB->ctrl.u64TSCOffset - 0x400 /* guestimate of world switch overhead in clock ticks */);
     TMNotifyEndOfExecution(pVCpu);
     VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED);

trunk/src/VBox/VMM/VMMR0/HWVMXR0.cpp

@@ -2592 +2592 @@
     /* Possibly the last TSC value seen by the guest (too high) (only when we're in tsc offset mode). */
     if (!(pVCpu->hwaccm.s.vmx.proc_ctls & VMX_VMCS_CTRL_PROC_EXEC_CONTROLS_RDTSC_EXIT))
-        TMCpuTickSetLastSeen(pVCpu, ASMReadTSC() + pVCpu->hwaccm.s.vmx.u64TSCOffset - 0x1000 /* guestimate of world switch overhead in clock ticks */);
+        TMCpuTickSetLastSeen(pVCpu, ASMReadTSC() + pVCpu->hwaccm.s.vmx.u64TSCOffset - 0x400 /* guestimate of world switch overhead in clock ticks */);
 
     TMNotifyEndOfExecution(pVCpu);