所以我真的很想看到一些并行的速度测试（比如从 100 到 10000 个并行线程），其中每个线程在至少 3 种类型的并发映射上插入、查找、删除 - std::map （带有一些互斥体）vs libcds（并发数据结构） ...
因此，例如，如果这种比较尚不存在，请帮助我创建一个。
直接相关： LibCds：Michael Hashmap 和拆分顺序列表
想象我们有
#include <iostream>
#include <boost/thread.hpp>
#include <map>
class TestDs
{
public:
virtual bool containsKey(int key)=0;
virtual int get(int key)=0;
virtual int put(int key, int value)=0;
virtual int remove(int key)=0;
virtual int size()=0;
virtual const char* name()=0;
virtual void print()=0;
virtual void shutdown()=0;
};
class GeneralMap: public TestDs
{
private:
std::map<int,int> _ds;
mutable boost::mutex mut_;
public:
GeneralMap() {}
bool containsKey(int key) {
boost::mutex::scoped_lock lock(mut_);
if ( _ds.find(key) != _ds.end())
{
return true;
}
else
{
return false;
}
}
int get(int key) {
boost::mutex::scoped_lock lock(mut_);
return _ds[key];
}
int put(int key, int value) {
boost::mutex::scoped_lock lock(mut_);
_ds.insert(std::pair<int, int>(key,value));
return key;
}
int remove(int key) {
boost::mutex::scoped_lock lock(mut_);
return _ds.erase(key);
}
int size() {
boost::mutex::scoped_lock lock(mut_);
return _ds.size();
}
const char* name() {
return "StdMap";
}
void print() {}
void shutdown() {}
};
而不是如何创建这样的测试来创建N个线程并且每个线程都会调用create，find delete...我开始写一些东西，但它现在可以用boost 1.47.0编译代码...
#include <iostream>
#include <boost/thread.hpp>
#include <map>
#include <boost/thread.hpp>
#include <boost/thread/locks.hpp>
#include <boost/date_time.hpp>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int_distribution.hpp>
#include <boost/random.hpp>
#include <boost/progress.hpp>
class timer
{
public:
timer() : start_time_(boost::posix_time::microsec_clock::local_time()) {}
void restart()
{
start_time_ = boost::posix_time::microsec_clock::local_time();
}
boost::posix_time::time_duration elapsed() const
{
return boost::posix_time::microsec_clock::local_time() - start_time_;
}
private:
boost::posix_time::ptime start_time_;
};
class TestDs
{
public:
virtual bool containsKey(int key)=0;
virtual int get(int key)=0;
virtual int put(int key, int value)=0;
virtual int remove(int key)=0;
virtual int size()=0;
virtual const char* name()=0;
virtual void print()=0;
virtual void shutdown()=0;
};
class GeneralMap: public TestDs
{
private:
std::map<int,int> _ds;
mutable boost::mutex mut_;
public:
GeneralMap() {}
bool containsKey(int key) {
boost::mutex::scoped_lock lock(mut_);
if ( _ds.find(key) != _ds.end())
{
return true;
}
else
{
return false;
}
}
int get(int key) {
boost::mutex::scoped_lock lock(mut_);
return _ds[key];
}
int put(int key, int value) {
boost::mutex::scoped_lock lock(mut_);
_ds.insert(std::pair<int, int>(key,value));
return key;
}
int remove(int key) {
boost::mutex::scoped_lock lock(mut_);
return _ds.erase(key);
}
int size() {
boost::mutex::scoped_lock lock(mut_);
return _ds.size();
}
const char* name() {
return "StdMap";
}
void print() {}
void shutdown() {}
};
template <class map_wraper_t>
class test_map_wraper
{
public:
test_map_wraper(int threads_number)
{
n = threads_number;
}
void start_tests()
{
boost::upgrade_lock<boost::shared_mutex> lock(tests);
boost::upgrade_to_unique_lock<boost::shared_mutex> uniqueLock(lock);
boost::shared_lock<boost::shared_mutex> lock_r(results);
for(int i=0; i<n; i++)
{
boost::thread worker(&test_map_wraper::test, this, i);
}
boost::thread worker_r(&test_map_wraper::result, this);
timerForCaptureFame.restart();
}
private:
int n;
boost::shared_mutex tests;
boost::shared_mutex results;
boost::random::mt19937 rng;
timer timerForCaptureFame;
map_wraper_t Ds;
boost::progress_display *show_progress;
void test( int i)
{
boost::shared_lock<boost::shared_mutex> lock_r(results);
boost::shared_lock<boost::shared_mutex> lock(tests);
Ds.put(i, 0);
if (Ds.containsKey(i))
{
Ds.get(i);
}
Ds.remove(i);
}
void result()
{
boost::upgrade_lock<boost::shared_mutex> lock(results);
boost::upgrade_to_unique_lock<boost::shared_mutex> uniqueLock(lock);
std::cout << std::endl << "test of " << Ds.name() << " complite;" << std::endl << "test performed on " << n << " items" << std::endl << "test duration: " << timerForCaptureFame.elapsed() << std::endl;
}
};
int main()
{
int threads_n = 1000;
int tests = 5;
std::cout << "Number of required tests: " << tests << std::endl << "Number of threads in each test: " << threads_n << std::endl << "Wait for it..." << std::endl;
//for(int i = 0; i < tests; ++i)
//{
test_map_wraper<GeneralMap> GeneralMapTest(threads_n);
GeneralMapTest.start_tests();
//}
std::cin.get();
return 0;
}