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[host] added tracing class to help profile slow code points

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Geoffrey McRae
2017-12-23 18:15:15 +11:00
parent db52a55b36
commit 16e804b068
7 changed files with 128 additions and 4 deletions
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79
host/TraceUtil.h Normal file
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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
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; either version 2 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 for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#pragma once
#include <windows.h>
#include <stdint.h>
#include "common/debug.h"
#ifdef ENABLE_TRACING
#define TRACE TraceUtil::Trace(__FUNCTION__, __LINE__)
#define TRACE_START(x) TraceUtil::TraceStart(x)
#define TRACE_END TraceUtil::TraceEnd()
#else
#define TRACE
#define TRACE_START(x)
#define TRACE_END
#endif
class TraceUtil
{
private:
static double m_freq;
static LARGE_INTEGER m_last;
static LARGE_INTEGER m_start;
static const char * m_traceName;
public:
static void Initialize()
{
#ifdef ENABLE_TRACING
LARGE_INTEGER now;
QueryPerformanceFrequency(&now);
m_freq = (double)now.QuadPart / 1000.0;
QueryPerformanceCounter(&m_last);
#endif
}
static inline void Trace(const char * function, const unsigned int line)
{
LARGE_INTEGER now;
QueryPerformanceCounter(&now);
const double diff = (now.QuadPart - m_last.QuadPart) / m_freq;
m_last = now;
DEBUG_INFO("Trace [%8.4f] %s:%u", diff, function, line);
}
static inline void TraceStart(const char * traceName)
{
QueryPerformanceCounter(&m_start);
m_traceName = traceName;
}
static inline void TraceEnd()
{
LARGE_INTEGER now;
QueryPerformanceCounter(&now);
const double diff = (now.QuadPart - m_start.QuadPart) / m_freq;
DEBUG_INFO("Trace [%8.4f] %s", diff, m_traceName);
}
};