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28 | |
29 | |
30 | #include <QtCore/QCoreApplication> |
31 | #include <QtTest/QtTest> |
32 | |
33 | #include <private/cycle_p.h> |
34 | |
35 | class tst_BenchlibTickCounter: public QObject |
36 | { |
37 | Q_OBJECT |
38 | |
39 | private slots: |
40 | void threeBillionTicks(); |
41 | }; |
42 | |
43 | void 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 | |
65 | int 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 | |