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sdrangel/sdrbase/util/profiler.h

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2023-08-13 18:52:57 -04:00
//////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2023 Jon Beniston, M7RCE <jon@beniston.com> //
2023-08-13 18:52:57 -04:00
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
//////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_UTIL_PROFILEDATA_H_
#define INCLUDE_UTIL_PROFILEDATA_H_
#include <QHash>
#include <QMutex>
#include <QElapsedTimer>
#include <cmath>
#include "export.h"
// Profiler enables runtime collection of profile data (time taken to execute code)
// that can be displayed in the GUI
//
// PROFILER_START() and PROFILER_STOP() macros should be used in the same function:
// void func() {
// PROFILER_START()
// do_something();
// PROFILER_STOP("slow_code")
// }
//
// The parameters to PROFILER_STOP are:
// name: Name for the code being profiled. Profiles using the same name are averaged.
#ifdef ENABLE_PROFILER
#define PROFILER_START() \
QElapsedTimer profileTimer; \
profileTimer.start();
#define PROFILER_RESTART() \
profileTimer.start();
#define PROFILER_STOP(name) \
{ \
qint64 timeNanoSec = profileTimer.nsecsElapsed(); \
QHash<QString, ProfileData>& globalData = GlobalProfileData::getProfileData(); \
if (!globalData.contains(name)) { \
globalData.insert(name, ProfileData()); \
} \
ProfileData& profileData = globalData[name]; \
profileData.add(timeNanoSec); \
GlobalProfileData::releaseProfileData(); \
}
#else
#define PROFILER_START()
#define PROFILER_RESTART()
#define PROFILER_STOP(name)
#endif
class ProfileData
{
public:
ProfileData() :
m_numSamples(0),
m_last(0),
m_total(0)
{ }
void reset()
{
m_numSamples = 0;
m_total = 0;
}
void add(qint64 sample)
{
m_last = sample;
m_total += sample;
m_numSamples++;
}
double getAverage() const
{
if (m_numSamples > 0) {
return m_total / (double)m_numSamples;
} else {
return nan("");
}
}
qint64 getTotal() const { return m_total; }
qint64 getLast() const { return m_last; }
quint64 getNumSamples() const { return m_numSamples; }
private:
quint64 m_numSamples;
qint64 m_last;
qint64 m_total;
};
// Global thread-safe profile data that can be displayed in the GUI
class SDRBASE_API GlobalProfileData
{
public:
// Calls to getProfileData must be paired with releaseProfileData
static QHash<QString, ProfileData>& getProfileData();
static void releaseProfileData();
static void resetProfileData();
private:
static QHash<QString, ProfileData> m_profileData;
static QMutex m_mutex;
};
#endif /* INCLUDE_UTIL_PROFILEDATA_H_ */