Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 256 insertions, 0 deletions

diff --git a/src/VBox/Runtime/testcase/tstTimer.cpp b/src/VBox/Runtime/testcase/tstTimer.cpp
new file mode 100644
index 00000000..04d1bda4
--- /dev/null
+++ b/src/VBox/Runtime/testcase/tstTimer.cpp
@@ -0,0 +1,256 @@
+/* $Id: tstTimer.cpp $ */
+/** @file
+ * IPRT Testcase - Timers.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/timer.h>
+#include <iprt/time.h>
+#include <iprt/thread.h>
+#include <iprt/initterm.h>
+#include <iprt/message.h>
+#include <iprt/stream.h>
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+static volatile unsigned gcTicks;
+static volatile uint64_t gu64Min;
+static volatile uint64_t gu64Max;
+static volatile uint64_t gu64Prev;
+static volatile uint64_t gu64Norm;
+
+static uint32_t cFrequency[200];
+
+static DECLCALLBACK(void) TimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick)
+{
+    RT_NOREF_PV(pTimer); RT_NOREF_PV(pvUser); RT_NOREF_PV(iTick);
+
+    gcTicks++;
+
+    const uint64_t u64Now = RTTimeNanoTS();
+    if (gu64Prev)
+    {
+        const uint64_t u64Delta = u64Now - gu64Prev;
+        if (u64Delta < gu64Min)
+            gu64Min = u64Delta;
+        if (u64Delta > gu64Max)
+            gu64Max = u64Delta;
+        int i = (int)(  RT_ELEMENTS(cFrequency)
+                      - (u64Delta * (RT_ELEMENTS(cFrequency) / 2) / gu64Norm));
+        if (i >= 0 && i < (int)RT_ELEMENTS(cFrequency))
+            cFrequency[i]++;
+    }
+    gu64Prev = u64Now;
+}
+
+
+int main()
+{
+    /*
+     * Init runtime
+     */
+    unsigned cErrors = 0;
+    int rc = RTR3InitExeNoArguments(0);
+    if (RT_FAILURE(rc))
+        return RTMsgInitFailure(rc);
+
+    /*
+     * Check that the clock is reliable.
+     */
+    RTPrintf("tstTimer: TESTING - RTTimeNanoTS() for 2sec\n");
+    uint64_t uTSMillies = RTTimeMilliTS();
+    uint64_t uTSBegin = RTTimeNanoTS();
+    uint64_t uTSLast = uTSBegin;
+    uint64_t uTSDiff;
+    uint64_t cIterations = 0;
+
+    do
+    {
+        uint64_t uTS = RTTimeNanoTS();
+        if (uTS < uTSLast)
+        {
+            RTPrintf("tstTimer: FAILURE - RTTimeNanoTS() is unreliable. uTS=%RU64 uTSLast=%RU64\n", uTS, uTSLast);
+            cErrors++;
+        }
+        if (++cIterations > (2*1000*1000*1000))
+        {
+            RTPrintf("tstTimer: FAILURE - RTTimeNanoTS() is unreliable. cIterations=%RU64 uTS=%RU64 uTSBegin=%RU64\n", cIterations, uTS, uTSBegin);
+            return 1;
+        }
+        uTSLast = uTS;
+        uTSDiff = uTSLast - uTSBegin;
+    } while (uTSDiff < (2*1000*1000*1000));
+    uTSMillies = RTTimeMilliTS() - uTSMillies;
+    if (uTSMillies >= 2500 || uTSMillies <= 1500)
+    {
+        RTPrintf("tstTimer: FAILURE - uTSMillies=%RI64 uTSBegin=%RU64 uTSLast=%RU64 uTSDiff=%RU64\n",
+                 uTSMillies, uTSBegin, uTSLast, uTSDiff);
+        cErrors++;
+    }
+    if (!cErrors)
+        RTPrintf("tstTimer: OK      - RTTimeNanoTS()\n");
+
+    /*
+     * Tests.
+     */
+    static struct
+    {
+        unsigned uMicroInterval;
+        unsigned uMilliesWait;
+        unsigned cLower;
+        unsigned cUpper;
+    } aTests[] =
+    {
+        { 32000, 2000, 0, 0 },
+        { 20000, 2000, 0, 0 },
+        { 10000, 2000, 0, 0 },
+        {  8000, 2000, 0, 0 },
+        {  2000, 2000, 0, 0 },
+        {  1000, 2000, 0, 0 },
+        {   500, 5000, 0, 0 },
+        {   200, 5000, 0, 0 },
+        {   100, 5000, 0, 0 }
+    };
+
+    unsigned i = 0;
+    for (i = 0; i < RT_ELEMENTS(aTests); i++)
+    {
+        aTests[i].cLower = (aTests[i].uMilliesWait*1000 - aTests[i].uMilliesWait*100) / aTests[i].uMicroInterval;
+        aTests[i].cUpper = (aTests[i].uMilliesWait*1000 + aTests[i].uMilliesWait*100) / aTests[i].uMicroInterval;
+        gu64Norm = aTests[i].uMicroInterval*1000;
+
+        RTPrintf("\n"
+                 "tstTimer: TESTING - %d us interval, %d ms wait, expects %d-%d ticks.\n",
+                 aTests[i].uMicroInterval, aTests[i].uMilliesWait, aTests[i].cLower, aTests[i].cUpper);
+
+        /*
+         * Start timer which ticks every 10ms.
+         */
+        gcTicks = 0;
+        PRTTIMER pTimer;
+        gu64Max = 0;
+        gu64Min = UINT64_MAX;
+        gu64Prev = 0;
+        RT_ZERO(cFrequency);
+#ifdef RT_OS_WINDOWS
+        if (aTests[i].uMicroInterval < 1000)
+            continue;
+        rc = RTTimerCreate(&pTimer, aTests[i].uMicroInterval / 1000, TimerCallback, NULL);
+#else
+        rc = RTTimerCreateEx(&pTimer, aTests[i].uMicroInterval * (uint64_t)1000, 0, TimerCallback, NULL);
+#endif
+        if (RT_FAILURE(rc))
+        {
+            RTPrintf("tstTimer: FAILURE - RTTimerCreateEx(,%u*1M,,,) -> %Rrc\n", aTests[i].uMicroInterval, rc);
+            cErrors++;
+            continue;
+        }
+
+        /*
+         * Start the timer and active waiting for the requested test period.
+         */
+        uTSBegin = RTTimeNanoTS();
+#ifndef RT_OS_WINDOWS
+        rc = RTTimerStart(pTimer, 0);
+        if (RT_FAILURE(rc))
+        {
+            RTPrintf("tstTimer: FAILURE - RTTimerStart(,0) -> %Rrc\n", rc);
+            cErrors++;
+        }
+#endif
+
+        while (RTTimeNanoTS() - uTSBegin < (uint64_t)aTests[i].uMilliesWait * 1000000)
+            /* nothing */;
+
+        /* destroy the timer */
+        uint64_t uTSEnd = RTTimeNanoTS();
+        uTSDiff = uTSEnd - uTSBegin;
+        rc = RTTimerDestroy(pTimer);
+        if (RT_FAILURE(rc))
+        {
+            RTPrintf("tstTimer: FAILURE - RTTimerDestroy() -> %d gcTicks=%d\n", rc, gcTicks);
+            cErrors++;
+        }
+
+        RTPrintf("tstTimer: uTS=%RI64 (%RU64 - %RU64)\n", uTSDiff, uTSBegin, uTSEnd);
+        unsigned cTicks = gcTicks;
+        RTThreadSleep(aTests[i].uMicroInterval/1000 * 3);
+        if (gcTicks != cTicks)
+        {
+            RTPrintf("tstTimer: FAILURE - RTTimerDestroy() didn't really stop the timer! gcTicks=%d cTicks=%d\n", gcTicks, cTicks);
+            cErrors++;
+            continue;
+        }
+
+        /*
+         * Check the number of ticks.
+         */
+        if (gcTicks < aTests[i].cLower)
+        {
+            RTPrintf("tstTimer: FAILURE - Too few ticks gcTicks=%d (expected %d-%d)", gcTicks, aTests[i].cUpper, aTests[i].cLower);
+            cErrors++;
+        }
+        else if (gcTicks > aTests[i].cUpper)
+        {
+            RTPrintf("tstTimer: FAILURE - Too many ticks gcTicks=%d (expected %d-%d)", gcTicks, aTests[i].cUpper, aTests[i].cLower);
+            cErrors++;
+        }
+        else
+            RTPrintf("tstTimer: OK      - gcTicks=%d",  gcTicks);
+        RTPrintf(" min=%RU64 max=%RU64\n", gu64Min, gu64Max);
+
+        for (int j = 0; j < (int)RT_ELEMENTS(cFrequency); j++)
+        {
+            uint32_t len = cFrequency[j] * 70 / gcTicks;
+            uint32_t deviation = j - RT_ELEMENTS(cFrequency) / 2;
+            uint64_t u64FreqPercent = (uint64_t)cFrequency[j] * 10000 / gcTicks;
+            uint64_t u64FreqPercentFrac = u64FreqPercent % 100;
+            u64FreqPercent = u64FreqPercent / 100;
+            RTPrintf("%+4d%c %6u %3llu.%02llu%% ",
+                    deviation, deviation == 0 ? ' ' : '%', cFrequency[j],
+                    u64FreqPercent, u64FreqPercentFrac);
+            for (unsigned k = 0; k < len; k++)
+                RTPrintf("*");
+            RTPrintf("\n");
+        }
+    }
+
+    /*
+     * Summary.
+     */
+    if (!cErrors)
+        RTPrintf("tstTimer: SUCCESS\n");
+    else
+        RTPrintf("tstTimer: FAILURE %d errors\n", cErrors);
+    return !!cErrors;
+}
+