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Common: Add a built-in profiler

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This commit is contained in:
degasus
2014-11-19 19:57:12 +01:00
parent e40f129fdd
commit 94d9d138d9
9 changed files with 236 additions and 0 deletions
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138
Source/Core/Common/Profiler.cpp Normal file
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// Copyright 2014 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
static const u32 PROFILER_FIELD_LENGTH = 8;
static const u32 PROFILER_FIELD_LENGTH_FP = PROFILER_FIELD_LENGTH+3;
static const int PROFILER_LAZY_DELAY = 60; // in frames
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iomanip>
#include <ios>
#include <sstream>
#include "Common/Profiler.h"
#include "Common/Timer.h"
std::list<Profiler*> Profiler::s_all_profilers;
u32 Profiler::s_max_length = 0;
u64 Profiler::s_frame_time;
u64 Profiler::s_usecs_frame;
std::string Profiler::s_lazy_result = "";
int Profiler::s_lazy_delay = 0;
Profiler::Profiler(const std::string& name)
: m_name(name), m_usecs(0), m_usecs_min(-1), m_usecs_max(0), m_usecs_quad(0), m_calls(0), m_depth(0)
{
m_time = Common::Timer::GetTimeUs();
s_max_length = std::max<u32>(s_max_length, u32(m_name.length()));
s_all_profilers.push_back(this);
}
Profiler::~Profiler()
{
s_all_profilers.remove(this);
}
std::string Profiler::ToString()
{
if (s_lazy_delay > 0)
{
s_lazy_delay--;
return s_lazy_result;
}
s_lazy_delay = PROFILER_LAZY_DELAY - 1;
// don't write anything if no profilation is enabled
if (s_all_profilers.empty())
return "";
u64 end = Common::Timer::GetTimeUs();
s_usecs_frame = end - s_frame_time;
s_frame_time = end;
std::ostringstream buffer;
buffer << std::setw(s_max_length) << std::left << "" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << "calls" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << "sum" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH_FP) << std::right << "rel" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << "min" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH_FP) << std::right << "avg" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH_FP) << std::right << "stdev" << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << "max" << " ";
buffer << "/ usec" << std::endl;
for (auto profiler : s_all_profilers)
{
buffer << profiler->Read() << std::endl;
}
s_lazy_result = buffer.str();
return s_lazy_result;
}
void Profiler::Start()
{
if (!m_depth++)
{
m_time = Common::Timer::GetTimeUs();
}
}
void Profiler::Stop()
{
if (!--m_depth)
{
u64 end = Common::Timer::GetTimeUs();
u64 diff = end - m_time;
m_usecs += diff;
m_usecs_min = std::min(m_usecs_min, diff);
m_usecs_max = std::max(m_usecs_max, diff);
m_usecs_quad += diff * diff;
m_calls++;
}
}
std::string Profiler::Read()
{
double avg = 0;
double stdev = 0;
double time_rel = 0;
if(m_calls)
{
avg = double(m_usecs)/m_calls;
stdev = std::sqrt(double(m_usecs_quad)/m_calls - avg*avg);
}
else
{
m_usecs_min = 0;
}
if(s_usecs_frame)
{
time_rel = double(m_usecs)*100/s_usecs_frame;
}
std::ostringstream buffer;
buffer << std::setw(s_max_length) << std::left << m_name << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << m_calls << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << m_usecs << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH_FP) << std::right << time_rel << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << m_usecs_min << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH_FP) << std::right << std::fixed << std::setprecision(2) << avg << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH_FP) << std::right << std::fixed << std::setprecision(2) << stdev << " ";
buffer << std::setw(PROFILER_FIELD_LENGTH) << std::right << m_usecs_max;
m_usecs = 0;
m_usecs_min = -1;
m_usecs_max = 0;
m_usecs_quad = 0;
m_calls = 0;
return buffer.str();
}