Index: /trunk/src/VBox/ValidationKit/utils/fs/FsPerf.cpp
===================================================================
--- /trunk/src/VBox/ValidationKit/utils/fs/FsPerf.cpp	(revision 76917)
+++ /trunk/src/VBox/ValidationKit/utils/fs/FsPerf.cpp	(revision 76918)
@@ -735,5 +735,8 @@
     RTTESTI_CHECK_RC(RTFileQueryInfo(hFile1, &ObjInfo1,  RTFSOBJATTRADD_NOTHING), VINF_SUCCESS);
     RTTESTI_CHECK((RTTimeSpecGetSeconds(&ObjInfo1.ModificationTime) >> 2) == (RTTimeSpecGetSeconds(&Time2) >> 2));
-    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo1.AccessTime) == RTTimeSpecGetNano(&ObjInfo0.AccessTime));
+    char sz1[RTTIME_STR_LEN], sz2[RTTIME_STR_LEN]; /* Div by 1000 here for posix impl. using timeval. */
+    RTTESTI_CHECK_MSG(RTTimeSpecGetNano(&ObjInfo1.AccessTime) / 1000 == RTTimeSpecGetNano(&ObjInfo0.AccessTime) / 1000,
+                      ("%s, expected %s", RTTimeSpecToString(&ObjInfo1.AccessTime, sz1, sizeof(sz1)),
+                       RTTimeSpecToString(&ObjInfo0.AccessTime, sz2, sizeof(sz2))));
 
     /* Modify access time: */
@@ -742,5 +745,5 @@
     RTTESTI_CHECK_RC(RTFileQueryInfo(hFile1, &ObjInfo2,  RTFSOBJATTRADD_NOTHING), VINF_SUCCESS);
     RTTESTI_CHECK((RTTimeSpecGetSeconds(&ObjInfo2.AccessTime) >> 2) == (RTTimeSpecGetSeconds(&Time1) >> 2));
-    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo2.ModificationTime) == RTTimeSpecGetNano(&ObjInfo1.ModificationTime));
+    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo2.ModificationTime) / 1000 == RTTimeSpecGetNano(&ObjInfo1.ModificationTime) / 1000);
 
     /* Benchmark it: */
@@ -868,5 +871,5 @@
     RTTESTI_CHECK_RC(RTPathQueryInfoEx(g_szDir, &ObjInfo1,  RTFSOBJATTRADD_NOTHING,  RTPATH_F_ON_LINK), VINF_SUCCESS);
     RTTESTI_CHECK((RTTimeSpecGetSeconds(&ObjInfo1.ModificationTime) >> 2) == (RTTimeSpecGetSeconds(&Time2) >> 2));
-    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo1.AccessTime) == RTTimeSpecGetNano(&ObjInfo0.AccessTime));
+    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo1.AccessTime) / 1000 == RTTimeSpecGetNano(&ObjInfo0.AccessTime) / 1000 /* posix timeval */);
 
     /* Modify access time: */
@@ -875,5 +878,5 @@
     RTTESTI_CHECK_RC(RTPathQueryInfoEx(g_szDir, &ObjInfo2,  RTFSOBJATTRADD_NOTHING,  RTPATH_F_ON_LINK), VINF_SUCCESS);
     RTTESTI_CHECK((RTTimeSpecGetSeconds(&ObjInfo2.AccessTime) >> 2) == (RTTimeSpecGetSeconds(&Time1) >> 2));
-    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo2.ModificationTime) == RTTimeSpecGetNano(&ObjInfo1.ModificationTime));
+    RTTESTI_CHECK(RTTimeSpecGetNano(&ObjInfo2.ModificationTime) / 1000 == RTTimeSpecGetNano(&ObjInfo1.ModificationTime) / 1000 /* posix timeval */);
 
     /* Profile shallow: */
@@ -1210,7 +1213,13 @@
 
     /* Directories: */
-    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE("."))), VERR_ACCESS_DENIED);
+#if defined(RT_OS_WINDOWS)
+    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE("."))),  VERR_ACCESS_DENIED);
     RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE(".."))), VERR_ACCESS_DENIED);
-    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE(""))), VERR_ACCESS_DENIED);
+    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE(""))),   VERR_ACCESS_DENIED);
+#else
+    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE("."))),  VERR_IS_A_DIRECTORY);
+    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE(".."))), VERR_IS_A_DIRECTORY);
+    RTTESTI_CHECK_RC(RTFileDelete(InEmptyDir(RT_STR_TUPLE(""))),   VERR_IS_A_DIRECTORY);
+#endif
 
     /* Shallow: */
@@ -1746,7 +1755,7 @@
         {
             uint32_t const cbLeft   = (uint32_t)(cbBuf - offBuf);
-            uint32_t const cbToRead = aRuns[i].cbMax < UINT32_MAX / 2 ? RTRandU32Ex(1, aRuns[i].cbMax)
+            uint32_t const cbToRead = aRuns[i].cbMax < UINT32_MAX / 2 ? RTRandU32Ex(1, RT_MIN(aRuns[i].cbMax, cbLeft))
                                     : aRuns[i].cbMax == UINT32_MAX    ? RTRandU32Ex(RT_MAX(cbLeft / 4, 1), cbLeft)
-                                    : RTRandU32Ex(cbLeft >= _8K ? _8K : 1, RT_MIN(_1M, cbLeft));
+                                    :                                   RTRandU32Ex(cbLeft >= _8K ? _8K : 1, RT_MIN(_1M, cbLeft));
             size_t cbActual = 0;
             RTTESTI_CHECK_RC(RTFileRead(hFile1, &pbBuf[offBuf], cbToRead, &cbActual), VINF_SUCCESS);
@@ -1755,5 +1764,6 @@
             else
             {
-                RTTestIFailed("Attempting to read %#x bytes at %#zx, only got %#x bytes back!\n", cbToRead, offBuf, cbActual);
+                RTTestIFailed("Attempting to read %#x bytes at %#zx, only got %#x bytes back! (cbLeft=%#x cbBuf=%#zx)\n",
+                              cbToRead, offBuf, cbActual, cbLeft, cbBuf);
                 if (cbActual)
                     offBuf += cbActual;