VirtualBox

source: vbox/trunk/src/VBox/Runtime/testcase/tstTime-2.cpp@ 72140

Last change on this file since 72140 was 69111, checked in by vboxsync, 7 years ago

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1/* $Id: tstTime-2.cpp 69111 2017-10-17 14:26:02Z vboxsync $ */
2/** @file
3 * IPRT Testcase - Simple RTTime test.
4 */
5
6/*
7 * Copyright (C) 2006-2017 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include <iprt/time.h>
32#include <iprt/stream.h>
33#include <iprt/initterm.h>
34#include <iprt/thread.h>
35#include <VBox/sup.h>
36
37
38
39int main()
40{
41 unsigned cErrors = 0;
42 int i;
43 RTR3InitExeNoArguments(RTR3INIT_FLAGS_SUPLIB);
44 RTPrintf("tstTime-2: TESTING...\n");
45
46 /*
47 * RTNanoTimeTS() shall never return something which
48 * is less or equal to the return of the previous call.
49 */
50
51 RTTimeSystemNanoTS(); RTTimeNanoTS(); RTThreadYield();
52 uint64_t u64RTStartTS = RTTimeNanoTS();
53 uint64_t u64OSStartTS = RTTimeSystemNanoTS();
54#define NUMBER_OF_CALLS (100*_1M)
55
56 for (i = 0; i < NUMBER_OF_CALLS; i++)
57 RTTimeNanoTS();
58
59 uint64_t u64RTElapsedTS = RTTimeNanoTS();
60 uint64_t u64OSElapsedTS = RTTimeSystemNanoTS();
61 u64RTElapsedTS -= u64RTStartTS;
62 u64OSElapsedTS -= u64OSStartTS;
63 int64_t i64Diff = u64OSElapsedTS >= u64RTElapsedTS ? u64OSElapsedTS - u64RTElapsedTS : u64RTElapsedTS - u64OSElapsedTS;
64 if (i64Diff > (int64_t)(u64OSElapsedTS / 1000))
65 {
66 RTPrintf("tstTime-2: error: total time differs too much! u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n",
67 u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS);
68 cErrors++;
69 }
70 else
71 RTPrintf("tstTime-2: total time difference: u64OSElapsedTS=%#llx u64RTElapsedTS=%#llx delta=%lld\n",
72 u64OSElapsedTS, u64RTElapsedTS, u64OSElapsedTS - u64RTElapsedTS);
73
74 RTPrintf("tstTime-2: %u calls to RTTimeNanoTS\n", NUMBER_OF_CALLS);
75#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) /** @todo This isn't really x86 or AMD64 specific... */
76 RTPrintf("tstTime-2: RTTimeDbgSteps -> %u (%d ppt)\n", RTTimeDbgSteps(), ((uint64_t)RTTimeDbgSteps() * 1000) / NUMBER_OF_CALLS);
77 RTPrintf("tstTime-2: RTTimeDbgExpired -> %u (%d ppt)\n", RTTimeDbgExpired(), ((uint64_t)RTTimeDbgExpired() * 1000) / NUMBER_OF_CALLS);
78 RTPrintf("tstTime-2: RTTimeDbgBad -> %u (%d ppt)\n", RTTimeDbgBad(), ((uint64_t)RTTimeDbgBad() * 1000) / NUMBER_OF_CALLS);
79 RTPrintf("tstTime-2: RTTimeDbgRaces -> %u (%d ppt)\n", RTTimeDbgRaces(), ((uint64_t)RTTimeDbgRaces() * 1000) / NUMBER_OF_CALLS);
80#endif
81
82 if (!cErrors)
83 RTPrintf("tstTime-2: SUCCESS\n");
84 else
85 RTPrintf("tstTime-2: FAILURE - %d errors\n", cErrors);
86 return !!cErrors;
87}
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