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| #include <iostream>
#include <vector>
#include <iterator>
#include <ctime>
#include <sys/timeb.h>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cassert>
#include <cstring>
// const size_t K = 200;
const size_t K = 5;
const int nXLoop = 8000;
const int nYLoop = nXLoop; //Must be the same for both tests
struct timeb start;
struct timeb end;
double delta;
inline void endTimer(){
ftime(&end);
delta = end.time-start.time;
delta *= 1000;
delta += end.millitm-start.millitm;
delta /= 1000;
}
struct NMatrix
{
typedef int real;
NMatrix(std::size_t L_, std::size_t C_, bool zero_=true)
: m_buffer(new real[L_*C_]), m_L(L_), m_C(C_)
{
// if(zero_) std::fill_n(&m_buffer[0], m_L*m_C, real());
if(zero_) std::memset(&m_buffer[0], 0, m_L*m_C*sizeof(real));
}
~NMatrix() {delete[] m_buffer;}
NMatrix(NMatrix const& rhs_)
: m_buffer(new real[rhs_.m_L*rhs_.m_C]), m_L(rhs_.m_L), m_C(rhs_.m_C)
{
std::copy(&rhs_.m_buffer[0], &rhs_.m_buffer[m_L*m_C], &m_buffer[0]);
}
NMatrix& operator=(NMatrix rhs_) {
this->swap(rhs_);
return *this;
}
real const& operator()(size_t l_, size_t c_) const {
assert(l_ < m_L);
assert(c_ < m_C);
return m_buffer[l_*m_C + c_];
}
real & operator()(size_t l_, size_t c_) {
assert(l_ < m_L);
assert(c_ < m_C);
return m_buffer[l_*m_C + c_];
}
void swap(NMatrix & other) {
std::swap(m_buffer, other.m_buffer);
std::swap(m_L, other.m_L);
std::swap(m_C, other.m_C);
}
size_t L() const { return m_L; } // + C()
private:
// je reprends l'approche mono-alloc pour me simplifier la vie ici
real * m_buffer;
size_t m_L;
size_t m_C;
};
struct VMatrix
{
typedef int real;
VMatrix(std::size_t L_, std::size_t C_)
: m_buffer(L_*C_), m_L(L_), m_C(C_)
{
}
real const& operator()(size_t l_, size_t c_) const {
assert(l_ < m_L);
assert(c_ < m_C);
return m_buffer[l_*m_C + c_];
}
real & operator()(size_t l_, size_t c_) {
assert(l_ < m_L);
assert(c_ < m_C);
return m_buffer[l_*m_C + c_];
}
size_t L() const { return m_L; } // + C()
private:
std::vector<real> m_buffer;
size_t m_L;
size_t m_C;
};
template <typename Tab> void write(Tab& t_, char const* msg_){
// Un premier accès pour mettre en cache
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_[y][x] = x*y;
endTimer();
// Moyenne
double sum_delta = 0;
for (std::size_t k=0;k!=K;++k) {
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_[y][x] = x*y;
endTimer();
sum_delta+=delta;
}
std::cout << msg_ << delta << " -- moy: " << sum_delta/K << "\n";;
}
template <typename Tab> void Mwrite(Tab& t_, char const* msg_){
// Un premier accès pour mettre en cache
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_(y,x) = x*y;
endTimer();
// Moyenne
double sum_delta = 0;
for (std::size_t k=0;k!=K;++k) {
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_(y,x) = x*y;
endTimer();
sum_delta+=delta;
}
std::cout << msg_ << delta << " -- moy: " << sum_delta/K << "\n";;
}
template <typename Tab> int read(Tab const& t_, char const* msg_){
// Un premier accès pour mettre en cache
int v;
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
v += t_[y][x];
endTimer();
// Moyenne
double sum_delta = 0;
for (std::size_t k=0;k!=K;++k) {
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
v += t_[y][x];
endTimer();
sum_delta+=delta;
}
std::cout << msg_ << delta << " -- moy: " << sum_delta/K << "\n";;
return v;
}
template <typename Tab> int Mread(Tab const& t_, char const* msg_){
// Un premier accès pour mettre en cache
int v;
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
v += t_(y,x);
endTimer();
// Moyenne
double sum_delta = 0;
for (std::size_t k=0;k!=K;++k) {
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
v += t_(y,x);
endTimer();
sum_delta+=delta;
}
std::cout << msg_ << delta << " -- moy: " << sum_delta/K << "\n";;
return v;
}
template <typename Tab> void transpose(Tab & t_, char const* msg_)
{
// Un premier accès pour mettre en cache
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_[y][x] = t_[x][y];
endTimer();
// Moyenne
double sum_delta = 0;
for (std::size_t k=0;k!=K;++k) {
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_[y][x] = t_[x][y];
endTimer();
sum_delta+=delta;
}
std::cout << msg_ << delta << " -- moy: " << sum_delta/K << "\n";;
}
template <typename Tab> void Mtranspose(Tab & t_, char const* msg_)
{
// Un premier accès pour mettre en cache
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_(y,x) = t_(x,y);
endTimer();
// Moyenne
double sum_delta = 0;
for (std::size_t k=0;k!=K;++k) {
ftime(&start);
for (int y = 0; y < nYLoop; y++)
for (int x = 0; x < nXLoop; x++)
t_(y,x) = t_(x,y);
endTimer();
sum_delta+=delta;
}
std::cout << msg_ << delta << " -- moy: " << sum_delta/K << "\n";;
}
int main()
{
int nData;
///////////////////////////
////// Creation /////////
///////////////////////////
std::cout << "\n CREATE \n\n";
ftime(&start);
std::vector< std::vector<int> > vec(nXLoop, std::vector<int>(nYLoop));
endTimer();
std::cout << "Vector : "<< delta << "\n";
ftime(&start);
int** aNew(new int*[nYLoop]);
for (int i = 0; i < nYLoop; i++){
aNew[i] = new int[nXLoop];
}
endTimer();
std::cout << "ArrayNew : "<< delta << "\n";
ftime(&start);
int** aMalloc;
aMalloc = (int**) malloc(nYLoop*sizeof(int*));
for (int i = 0; i < nYLoop; i++){
aMalloc[i] = (int*) malloc(nXLoop*sizeof(int));
}
endTimer();
std::cout << "ArrayMalloc pas robuste : "<< delta << "\n";;
{
ftime(&start);
int** aMalloc = static_cast<int**>(malloc(nYLoop*sizeof(int*)));
if (!aMalloc) throw std::bad_alloc();
int i=0;
for (; i < nYLoop; i++){
aMalloc[i] = static_cast <int*>(malloc(nXLoop*sizeof(int)));
if (!aMalloc[i]) break;
}
if (i != nYLoop) {
for (size_t j=0;j!=i;++j) {
free(aMalloc[j]);
}
free(aMalloc);
throw std::bad_alloc();
}
endTimer();
std::cout << "ArrayMalloc robuste : "<< delta << "\n";;
}
ftime(&start);
int** aCalloc;
aCalloc = (int**) calloc(nYLoop,sizeof(int*));
if (!aCalloc) throw std::bad_alloc();
for (int i = 0; i < nYLoop; i++){
aCalloc[i] = (int*) calloc(nXLoop,sizeof(int));
if (!aCalloc[i]) throw std::bad_alloc();
}
endTimer();
std::cout << "ArrayCalloc quasi-robuste : "<< delta << "\n";;
ftime(&start);
NMatrix nm0(nYLoop, nXLoop);
endTimer();
std::cout << "NewMatrix-0: "<< delta << "\n";;
ftime(&start);
NMatrix nm_(nYLoop, nXLoop, false);
endTimer();
std::cout << "NewMatrix-?: "<< delta << "\n";;
ftime(&start);
VMatrix vm(nYLoop, nXLoop);
endTimer();
std::cout << "VectMatrix : "<< delta << "\n";;
/////////////////////////////////////////
////////////////Write/////////////////////
/////////////////////////////////////////
std::cout << "\n WRITE \n\n";
write(vec , "vector : ");
write(aNew , "ArrayNew : ");
write(aMalloc, "ArrayMalloc: ");
write(aCalloc, "ArrayCalloc: ");
Mwrite(nm0 , "NewMatrix-0: ");
Mwrite(nm_ , "NewMatrix-?: ");
Mwrite(vm , "VectMatrix : ");
/////////////////////////////////////////
////////////////Read/////////////////////
/////////////////////////////////////////
const std::size_t K = 1;
std::cout << "\n READ \n\n";
int v;
v= read(vec , "vector : ");
v+= read(aNew , "ArrayNew : ");
v+= read(aMalloc, "ArrayMalloc: ");
v+= read(aCalloc, "ArrayCalloc: ");
v+= Mread(nm0 , "NewMatrix-0: ");
v+= Mread(nm_ , "NewMatrix-?: ");
v+= Mread(vm , "VectMatrix : ");
std::cerr << v << "\n";
/////////////////////////////////////////
////////////////Both/////////////////////
/////////////////////////////////////////
std::cout << "\n Transpose (R+W) \n\n";
transpose(vec , "vector : ");
transpose(aNew , "ArrayNew : ");
transpose(aMalloc, "ArrayMalloc: ");
transpose(aCalloc, "ArrayCalloc: ");
Mtranspose(nm0 , "NewMatrix-0: ");
Mtranspose(nm_ , "NewMatrix-?: ");
Mtranspose(vm , "VectMatrix : ");
}
// Vim: let $CXXFLAGS='-O3 -std=c++0x -DNDEBUG' |
Vecteur contre tableau : quelques tests
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Envoyé par _zzyx_
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