File indexing completed on 2024-05-12 05:43:25

0001 /*
0002     Copyright (C) 2015 Volker Krause <vkrause@kde.org>
0003 
0004     This program is free software; you can redistribute it and/or modify it
0005     under the terms of the GNU Library General Public License as published by
0006     the Free Software Foundation; either version 2 of the License, or (at your
0007     option) any later version.
0008 
0009     This program is distributed in the hope that it will be useful, but WITHOUT
0010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
0012     License for more details.
0013 
0014     You should have received a copy of the GNU General Public License
0015     along with this program.  If not, see <https://www.gnu.org/licenses/>.
0016 */
0017 
0018 #ifndef LDBENCHMARK_H
0019 #define LDBENCHMARK_H
0020 
0021 #include <QByteArray>
0022 #include <QStringList>
0023 #include <QVector>
0024 
0025 class QProcess;
0026 
0027 class ElfFileSet;
0028 class ElfFile;
0029 
0030 /** Load all libraries in dependency order one by one and measure the needed time. */
0031 class LDBenchmark
0032 {
0033 public:
0034     void measureFileSet(ElfFileSet *fileSet);
0035 
0036     void writeCSV(const QString &fileName);
0037 
0038     /** Number of files we have results for. */
0039     int size() const;
0040 
0041     enum class LoadMode { None, Now, Lazy };
0042     double median(LoadMode mode, int index) const;
0043     double min(LoadMode mode, int index) const;
0044     ElfFile* file(int index) const;
0045 
0046 private:
0047     void measure(LoadMode mode, int iterations);
0048     void readResults(QProcess *proc, LoadMode mode);
0049 
0050     ElfFileSet *m_fileSet = nullptr;
0051 
0052     struct Result {
0053         QByteArray fileName;
0054         QVector<double> lazy;
0055         QVector<double> now;
0056     };
0057     QVector<Result> m_results;
0058     QStringList m_args;
0059 };
0060 
0061 #endif // LDBENCHMARK_H