Changeset 57174 in vbox

Timestamp:

Aug 4, 2015 11:45:02 AM (10 years ago)

Author:

vboxsync

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

101922

Message:

supdrvMeasureTscDeltaOne: Shot at the FX-8350 problem - don't measure using cores/modules/threads with adjacent APIC IDs, just like we do on Intel. Exclude bulldozers as FX-8150 experiments (way back) indicated that this was counterproductive there, IIRC.

File:

• trunk/src/VBox/HostDrivers/Support/SUPDrvGip.cpp (modified) (2 diffs)

trunk/src/VBox/HostDrivers/Support/SUPDrvGip.cpp

@@ -3727 +3727 @@
     PSUPGIPCPU          pGipCpuMaster;
     uint32_t            iGipCpuMaster;
+    uint32_t            u32Tmp;
 
     /* Validate input a bit. */
@@ -3769 +3770 @@
     pGipCpuMaster = &pGip->aCPUs[iGipCpuMaster];
     if (   (   (pGipCpuMaster->idApic & ~1) == (pGipCpuWorker->idApic & ~1)
+            && pGip->cOnlineCpus > 2
             && ASMHasCpuId()
             && ASMIsValidStdRange(ASMCpuId_EAX(0))
             && (ASMCpuId_EDX(1) & X86_CPUID_FEATURE_EDX_HTT)
-            && !ASMIsAmdCpu()
-            && pGip->cOnlineCpus > 2)
+            && (   !ASMIsAmdCpu()
+                || ASMGetCpuFamily(u32Tmp = ASMCpuId_EAX(1)) > 0x15
+                || (   ASMGetCpuFamily(u32Tmp)   == 0x15           /* Piledriver+, not bulldozer (FX-4150 didn't like it). */
+                    && ASMGetCpuModelAMD(u32Tmp) >= 0x02) ) )
         || !RTMpIsCpuOnline(idMaster) )
     {