[Boost-users] Thread overhead

Subject: [Boost-users] Thread overhead
From: Alireza Haghdoost (haghdoost_at_[hidden])
Date: 2012-08-20 00:11:49

Hi

Is there anyway to reduce overhead of threadFoo() call in this simple program  ?

class baseClass {
public:
    void foo(){
        boost::posix_time::milliseconds delay(143);
        boost::this_thread::sleep(delay);
    }
    void threadFoo(){
        threadObjOne = boost::thread(&baseClass::foo, this);
        threadObjTwo = boost::thread(&baseClass::foo, this);
        threadObjOne.join();
        threadObjTwo.join();
    }
private:
    boost::thread threadObjOne;
    boost::thread threadObjTwo;
};

int main(){
    std::cout<< "main startup"<<std::endl;

    baseClass baseObj;

    tick_t startTime,endTime;

    rdtscll(startTime);

    baseObj.foo();

    rdtscll(endTime);

    std::cout<<"native foo() call takes "<< endTime-startTime <<"
clock cycles"<<std::endl;

    rdtscll(startTime);

    baseObj.threadFoo();

    rdtscll(endTime);

    std::cout<<"Thread foo() call takes "<< endTime-startTime <<"
clock cycles"<<std::endl;

}

The output is :
main startup
native foo() call takes 368222398 clock cycles
Thread foo() call takes 372600905 clock cycles