Changeset 52895 in vbox for trunk/src/VBox/HostDrivers/Support

Timestamp:

Sep 30, 2014 10:20:13 AM (10 years ago)

Author:

vboxsync

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

96324

Message:

HostDrivers/support: reset the minimum compare-read time variable on each try.

File:

• trunk/src/VBox/HostDrivers/Support/SUPDrv.c (modified) (4 diffs)

trunk/src/VBox/HostDrivers/Support/SUPDrv.c

@@ -5657 +5657 @@
             if (RT_SUCCESS(rc))
             {
+#ifdef DEBUG_ramshankar
+                for (unsigned iCpu = 0; iCpu < pGip->cCpus; iCpu++)
+                    OSDBGPRINT(("supdrvGipCreate: cpu[%u] delta %lld\n", iCpu, pGip->aCPUs[iCpu].i64TSCDelta));
+#endif
+
                 /*
                  * Create the timer.
@@ -6105 +6110 @@
     PSUPGIPCPU         pGipCpuMaster = &pGip->aCPUs[idxMaster];
     PSUPGIPCPU         pGipCpuWorker = &pGip->aCPUs[idxWorker];
-    uint64_t           uMinCmpReadTime = UINT64_MAX;
     int                cTriesLeft = 12;
 
@@ -6160 +6164 @@
     while (cTriesLeft-- > 0)
     {
-        unsigned i;
+        unsigned    i;
+        uint64_t    uMinCmpReadTime = UINT64_MAX;
         RTCCUINTREG uFlags = ASMIntDisableFlags();          /* Disable interrupts for the duration of a try. */
         for (i = 0; i < GIP_TSC_DELTA_LOOPS; i++)
@@ -6209 +6214 @@
                 while (ASMAtomicReadU32(&g_pTscDeltaSync->u) != GIP_TSC_DELTA_SYNC_START)
                     ;
+                Assert(pGipCpuMaster->u64TSCSample == GIP_TSC_DELTA_RSVD);
                 ASMAtomicWriteU32(&g_pTscDeltaSync->u, GIP_TSC_DELTA_SYNC_WORKER_READY);