[boost] [object_pool]too slow?

Subject: [boost] [object_pool]too slow?
From: jon_zhou_at_[hidden]
Date: 2009-03-09 22:59:04

Dear boost members,

anyony can check the code below? the way that I am using boost/pool is correct?

it is too slow in my "linux 2.6+Intel(R) Core(TM)2 Duo CPU     E6850  @ 3.00GHz" pc

thanks!

*********
#include "boost/pool/object_pool.hpp"
#include <sys/time.h>
#include <pthread.h>
#include <asm/atomic.h>
#include <stdlib.h>

class Rational
{
public:
    Rational(int a = 0,int b = 1):n(a),d(b)
    {
    }   
   

private:
    int n;
    int d;       
    
};

atomic_t gv;
boost::object_pool<Rational> pool;

void *thread_function(void *arg)
{ 
   
   struct timeval tpstart,tpend;
   atomic_t *v=(atomic_t *)arg;
   Rational *array[1000];
   // Start timing here
   gettimeofday(&tpstart,NULL);
   
    
    for (int j = 0; j < 50000; j++)
    {
        for (int i = 0; i < 1000; i++) 
        {
            array[i] = pool.construct(i);
            
        }
        for (int i = 0; i < 1000; i++) 
        {
            pool.destroy(array[i]);
        }
    }
    gettimeofday(&tpend,NULL);
    int timeuse = (tpend.tv_sec-tpstart.tv_sec)*1000000 + (tpend.tv_usec-tpstart.tv_usec);
    printf("time= %d usec\n",timeuse);
    atomic_add(timeuse, v);
}

int main(int argc,char **argv)
{
    if (argc != 2)
    {
        perror("usuage:Mempool numberOfThreads\n");
        exit(-1);
    }
    /*
    * initialize atomic_t
    */
    atomic_set(&gv, 0);
    char *end;
    int numThreads = strtol(argv[1],&end,10);
    pthread_t a_thread[numThreads];
    
    
    void *thread_result;
    int res;
    for (int i=0; i < numThreads;i++)
    {
        res = pthread_create(&a_thread[i], NULL, thread_function, (void *)&gv);
    }

    for (int i=0; i < numThreads;i++)
    {
        res = pthread_join(a_thread[i], &thread_result);
    }

    printf("\nTotal time= %d usec\n",gv);    
}

Regards,
zhou rui