1 files changed, 104 insertions, 0 deletions
diff --git a/src/VBox/Runtime/testcase/tstTime-2.cpp b/src/VBox/Runtime/testcase/tstTime-2.cpp
new file mode 100644
index 00000000..6ae4da4f
--- /dev/null
+++ b/src/VBox/Runtime/testcase/tstTime-2.cpp
@@ -0,0 +1,104 @@
+/* $Id: tstTime-2.cpp $ */
+/** @file
+ * IPRT Testcase - Simple RTTime test.
+ */
+
+/*
+ * Copyright (C) 2006-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/time.h>
+#include <iprt/stream.h>
+#include <iprt/initterm.h>
+#include <iprt/thread.h>
+#include <VBox/sup.h>
+
+
+/* HACK ALERT! */
+#if defined(RT_OS_DARWIN) && defined(RT_ARCH_ARM64)
+# undef  RTTimeNanoTSWorkerName
+# define RTTimeNanoTSWorkerName() "system"
+#endif
+
+
+int main()
+{
+    unsigned cErrors = 0;
+    int i;
+    RTR3InitExeNoArguments(RTR3INIT_FLAGS_SUPLIB);
+    RTPrintf("tstTime-2: TESTING...\n");
+
+    /*
+     * RTNanoTimeTS() shall never return something which
+     * is less or equal to the return of the previous call.
+     */
+
+    RTTimeSystemNanoTS(); RTTimeNanoTS(); RTThreadYield();
+    uint64_t u64RTStartTS = RTTimeNanoTS();
+    uint64_t u64OSStartTS = RTTimeSystemNanoTS();
+#define NUMBER_OF_CALLS (100*_1M)
+
+    for (i = 0; i < NUMBER_OF_CALLS; i++)
+        RTTimeNanoTS();
+
+    uint64_t u64RTElapsedTS = RTTimeNanoTS();
+    uint64_t u64OSElapsedTS = RTTimeSystemNanoTS();
+    u64RTElapsedTS -= u64RTStartTS;
+    u64OSElapsedTS -= u64OSStartTS;
+    int64_t i64Diff = u64OSElapsedTS >= u64RTElapsedTS ? u64OSElapsedTS - u64RTElapsedTS : u64RTElapsedTS - u64OSElapsedTS;
+    if (i64Diff > (int64_t)(u64OSElapsedTS / 1000))
+    {
+        RTPrintf("tstTime-2: error: total time differs too much! u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n",
+                 u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS);
+        cErrors++;
+    }
+    else
+        RTPrintf("tstTime-2: total time difference: u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n",
+                 u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS);
+
+    RTPrintf("tstTime-2: %'u calls to RTTimeNanoTS in %'lluns -> %'llu calls/sec (%s)\n",
+             NUMBER_OF_CALLS, u64RTElapsedTS, (uint64_t)(NUMBER_OF_CALLS / ((double)u64RTElapsedTS / RT_NS_1SEC)), RTTimeNanoTSWorkerName());
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) /** @todo This isn't really x86 or AMD64 specific... */
+    RTPrintf("tstTime-2: RTTimeDbgSteps   -> %u (%d ppt)\n", RTTimeDbgSteps(),   ((uint64_t)RTTimeDbgSteps() * 1000) / NUMBER_OF_CALLS);
+    RTPrintf("tstTime-2: RTTimeDbgExpired -> %u (%d ppt)\n", RTTimeDbgExpired(), ((uint64_t)RTTimeDbgExpired() * 1000) / NUMBER_OF_CALLS);
+    RTPrintf("tstTime-2: RTTimeDbgBad     -> %u (%d ppt)\n", RTTimeDbgBad(),     ((uint64_t)RTTimeDbgBad() * 1000) / NUMBER_OF_CALLS);
+    RTPrintf("tstTime-2: RTTimeDbgRaces   -> %u (%d ppt)\n", RTTimeDbgRaces(),   ((uint64_t)RTTimeDbgRaces() * 1000) / NUMBER_OF_CALLS);
+#endif
+
+    if (!cErrors)
+        RTPrintf("tstTime-2: SUCCESS\n");
+    else
+        RTPrintf("tstTime-2: FAILURE - %d errors\n", cErrors);
+    return !!cErrors;
+}