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39
40#ifndef QBENCHMARKPERFEVENTS_P_H
41#define QBENCHMARKPERFEVENTS_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtTest/private/qbenchmarkmeasurement_p.h>
55
56QT_BEGIN_NAMESPACE
57
58class QBenchmarkPerfEventsMeasurer : public QBenchmarkMeasurerBase
59{
60public:
61 QBenchmarkPerfEventsMeasurer();
62 ~QBenchmarkPerfEventsMeasurer();
63 void init() override;
64 void start() override;
65 qint64 checkpoint() override;
66 qint64 stop() override;
67 bool isMeasurementAccepted(qint64 measurement) override;
68 int adjustIterationCount(int suggestion) override;
69 int adjustMedianCount(int suggestion) override;
70 bool repeatCount() override { return true; }
71 bool needsWarmupIteration() override { return true; }
72 QTest::QBenchmarkMetric metricType() override;
73
74 static bool isAvailable();
75 static QTest::QBenchmarkMetric metricForEvent(quint32 type, quint64 event_id);
76 static void setCounter(const char *name);
77 static void listCounters();
78private:
79 int fd = -1;
80
81 qint64 readValue();
82};
83
84QT_END_NAMESPACE
85
86#endif // QBENCHMARKPERFEVENTS_P_H
87

source code of qtbase/src/testlib/qbenchmarkperfevents_p.h