Changeset 54316 in vbox for trunk/src/VBox/HostDrivers/Support

Timestamp:

Feb 19, 2015 9:37:41 PM (10 years ago)

Author:

vboxsync

Message:

supdrvMeasureTscDeltaCallback: Changed it to pick the delta closest to zero instead of the smaller one.

File:

• trunk/src/VBox/HostDrivers/Support/SUPDrv.c (modified) (1 diff)

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

@@ -7395 +7395 @@
                         int64_t iDelta = pGipCpuWorker->u64TSCSample
                                        - (pGipCpuMaster->u64TSCSample - pGipCpuMaster->i64TSCDelta);
-                        /** @todo r=bird: Why isn't this code using absolute values? Guess it mostly works fine because
-                         * the detection code is biased thowards positive deltas (see tstSupTscDelta.cpp output) ... */
-                        if (iDelta < pGipCpuWorker->i64TSCDelta)
+                        if (  iDelta >= 0
+                            ? iDelta < pGipCpuWorker->i64TSCDelta
+                            : iDelta > pGipCpuWorker->i64TSCDelta || pGipCpuWorker->i64TSCDelta == INT64_MAX)
                             pGipCpuWorker->i64TSCDelta = iDelta;
                     }