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test_memcpy.cpp
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236 lines (176 loc) · 5.22 KB
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#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#include <emscripten/bind.h>
#endif
#include <iostream>
#include <sstream>
#include <memory>
#include "test_case_with_time_measurements.h"
#include "test_pattern_generation.h"
namespace Memcpy {
template<class T>
class TestCaseMemcpy : public TestCaseWithTimeMeasurements {
protected:
const T* m_in;
T* m_out;
const size_t m_num_elements;
public:
TestCaseMemcpy( const string& case_name, const size_t num_elements )
:TestCaseWithTimeMeasurements { case_name }
,m_num_elements{ num_elements }
{
;
}
virtual ~TestCaseMemcpy()
{
;
}
virtual void compareTruth( const T* truth )
{
for ( size_t i = 0; i < m_num_elements; i++ ) {
if ( m_out[ i ] != truth[ i ] ) {
setTrueFalse( false );
}
}
setTrueFalse( true );
}
virtual void setIn ( const T* const in ){ m_in = in; }
virtual void setOut( T* const out ){ m_out = out; }
virtual T* getOut( ){ return m_out; }
virtual void run() = 0;
};
template<class T>
class TestCaseMemcpy_baseline : public TestCaseMemcpy<T> {
public:
TestCaseMemcpy_baseline( const string& case_name, const size_t num_elements )
:TestCaseMemcpy<T>{ case_name, num_elements }
{
}
virtual ~TestCaseMemcpy_baseline(){
;
}
void run()
{
for ( size_t i = 0; i < this->m_num_elements ; i++ ) {
// if (i % 1 == 0) {
// __builtin_prefetch (&(this->m_out[i+1]), 1, 0);
// __builtin_prefetch (&(this->m_in [i+1]), 0, 0);
// }
this->m_out[i] = this->m_in[i];
}
}
};
template<class T>
class TestCaseMemcpy_memcpy : public TestCaseMemcpy<T> {
public:
TestCaseMemcpy_memcpy( const string& case_name, const size_t num_elements )
:TestCaseMemcpy<T>{ case_name, num_elements }
{
;
}
virtual ~TestCaseMemcpy_memcpy()
{
;
}
void run()
{
memcpy( this->m_out, this->m_in, sizeof(T) * this->m_num_elements );
}
};
template <class T>
class TestExecutorMemcpy : public TestExecutor {
protected:
const bool m_repeatable;
default_random_engine m_e;
T* m_in;
T* m_out;
T* m_out_baseline;
public:
TestExecutorMemcpy(
TestResults& results,
const int num_elements,
const int num_trials,
const bool repeatable,
const T min_val,
const T max_val
)
:TestExecutor { results, num_elements, num_trials }
,m_repeatable { repeatable }
,m_e { static_cast<unsigned int>( repeatable ? 0 : chrono::system_clock::now().time_since_epoch().count() ) }
,m_in { new T[ num_elements ] }
,m_out { new T[ num_elements ] }
,m_out_baseline{ new T[ num_elements ] }
{
fillArrayWithRandomValues( m_e, m_in, m_num_elements, min_val, max_val );
memset( m_out, 0, m_num_elements * sizeof(T) );
memset( m_out_baseline, 0, m_num_elements * sizeof(T) );
}
virtual ~TestExecutorMemcpy()
{
delete[] m_in;
delete[] m_out;
delete[] m_out_baseline;
}
void cleanupAfterBatchRuns ( const int test_case )
{
auto t = dynamic_pointer_cast< TestCaseMemcpy< T > >( this->m_test_cases[ test_case ] );
if ( test_case == 0 ) {
memcpy( m_out_baseline, t->getOut(), sizeof(T) * m_num_elements );
}
t->compareTruth( m_out_baseline );
}
void prepareForRun ( const int test_case, const int num ) {
memset( m_out, 0, sizeof(T)*m_num_elements );
auto t = dynamic_pointer_cast<TestCaseMemcpy<T>>( this->m_test_cases[ test_case ] );
t->setIn ( m_in );
t->setOut( m_out );
}
};
static const size_t NUM_TRIALS = 10;
static size_t nums_elements[] = { 256, 4*1024, 64*1024, 1024*1024, 16*1024*1024 };
template<class T>
string testSuitePerType (
const bool print_diag
) {
vector< string > case_names {
"plain c++",
"memcpy()"
};
vector< string > header_line {
"length in bytes",
"1K",
"16K",
"256K",
"4M",
"64M"
};
TestResults results{ case_names, header_line };
for ( auto n : nums_elements ) {
TestExecutorMemcpy< T > e( results, n, NUM_TRIALS, false , INT_MIN, INT_MAX );
e.addTestCase( make_shared< TestCaseMemcpy_baseline< T > > ( case_names[ 0 ], n ) );
e.addTestCase( make_shared< TestCaseMemcpy_memcpy < T > > ( case_names[ 1 ], n ) );
e.execute( print_diag );
}
std::stringstream ss;
results.printHTML( ss );
return ss.str();
}
} // namespace Memcpy
#ifdef __EMSCRIPTEN__
string testMemcpy()
{
return Memcpy::testSuitePerType< int >( true );
}
EMSCRIPTEN_BINDINGS( memcpy_module ) {
emscripten::function( "testMemcpy", &testMemcpy );
}
#else
int main( int argc, char* argv[] )
{
const bool print_diag = (argc == 2);
cout << "memcpy (bytes)\n\n";
cout << Memcpy::testSuitePerType< int >( print_diag );
cout << "\n\n";
return 0;
}
#endif