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28
29
30#include <QtCore/QCoreApplication>
31#include <QtTest/QtTest>
32
33#include <private/cycle_p.h>
34
35class tst_BenchlibTickCounter: public QObject
36{
37 Q_OBJECT
38
39private slots:
40 void threeBillionTicks();
41};
42
43void tst_BenchlibTickCounter::threeBillionTicks()
44{
45#ifndef HAVE_TICK_COUNTER
46 QSKIP("Tick counter not available on this platform");
47#else
48 QBENCHMARK {
49 CycleCounterTicks start = getticks();
50 double el = 0.;
51 double max = el;
52 while (el < 3000000000.) {
53 /* Verify that elapsed time never decreases */
54 QVERIFY2(el >= max, qPrintable(
55 QString("Tick counter is not monotonic\nElapsed moved from %1 to %2")
56 .arg(max).arg(el)
57 ));
58 max = el;
59 el = elapsed(t1: getticks(), t0: start);
60 }
61 }
62#endif
63}
64
65int main(int argc, char *argv[])
66{
67 std::vector<const char*> args(argv, argv + argc);
68 args.push_back(x: "-tickcounter");
69 argc = args.size();
70 argv = const_cast<char**>(&args[0]);
71
72 QTEST_MAIN_IMPL(tst_BenchlibTickCounter)
73}
74
75#include "tst_benchlibtickcounter.moc"
76

source code of qtbase/tests/auto/testlib/selftests/benchlibtickcounter/tst_benchlibtickcounter.cpp