Changeset 87939 in vbox

Timestamp:

Mar 3, 2021 1:50:41 PM (4 years ago)

Author:

vboxsync

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

143034

Message:

VMM/HMVMX: Increase the lower preemption timer limit to 32768Hz. Windows like using RTC at 2048Hz for 2048Hz to be a healthy one. bugref:9890

File:

• trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMR0/HMVMXR0.cpp

@@ -7165 +7165 @@
         /* Make sure the returned values have sane upper and lower boundaries. */
         uint64_t const u64CpuHz = SUPGetCpuHzFromGipBySetIndex(g_pSUPGlobalInfoPage, pVCpu->iHostCpuSet);
-        cTicksToDeadline   = RT_MIN(cTicksToDeadline, u64CpuHz / 64);      /* 1/64th of a second */ /** @todo r=bird: Once real+virtual timers move to separate thread, we can raise the upper limit (16ms isn't much). ASSUMES working poke cpu function. */
-        cTicksToDeadline   = RT_MAX(cTicksToDeadline, u64CpuHz / 2048);    /* 1/2048th of a second */
+        cTicksToDeadline   = RT_MIN(cTicksToDeadline, u64CpuHz / 64);      /* 1/64th of a second,  15.625ms. */ /** @todo r=bird: Once real+virtual timers move to separate thread, we can raise the upper limit (16ms isn't much). ASSUMES working poke cpu function. */
+        cTicksToDeadline   = RT_MAX(cTicksToDeadline, u64CpuHz / 32678);   /* 1/32768th of a second,  ~30us. */
         cTicksToDeadline >>= pVM->hm.s.vmx.cPreemptTimerShift;