/*cputest.c
* Tyler Simon
* 8/24/2010
* Do some CPU intensive work with quicksort
* Print out usage per core getpinfo
*/



#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>
#include <sys/types.h>
#include <time.h>
#include <string.h>

int ascending(const int *a, const int *b)
{
  int temp = *a - *b;

  if (temp > 0)
    return 1;
  else if (temp < 0)
    return -1;
  else
    return 0;
}

int descending(const int *a, const int *b)
{
  int temp = *a - *b;
  if (temp < 0)
    return 1;
  else if (temp > 0)
    return -1;
  else
    return 0;
}

double getCurrentTime(void)
{
     struct timeval tval;
     gettimeofday(&tval, NULL);
     return (tval.tv_sec + tval.tv_usec/1000000.0);
}


//int main(int argc, char **argv){
double cpu_test(char *host,long int size, int tid){
  int i;
  double start_time, end_time,fin_time;
  int *nums;
  srand(time(NULL)+tid);
  
  nums = (int *)malloc(sizeof(int) * size);
  if(!nums){
    printf("ERROR ALLOCING MEM\n");
    exit(1);
  }
//printf("Populating %d element array with random numbers.\n", size);
  start_time = getCurrentTime();
  for(i=0; i<size; i++){
    nums[i] = rand();
   //printf("%s\b",status[i%4]);
  }
  end_time = getCurrentTime();
//printf("array population complete. (%gs)\n", end_time-start_time);

//printf("starting ascending qsort of %d elements.\n", size);
  
  start_time = getCurrentTime();
  qsort(nums, size, sizeof(int), ascending);

//printf("starting descending qsort of %d elements.\n", size);
  qsort(nums, size, sizeof(int), descending);
  end_time = getCurrentTime();
  fin_time=(double)(end_time-start_time);
//  printf("[%s] [%d] sorting %d numbers complete in (%g s)\n", host,tid,size,fin_time);
  
  return fin_time;
}

void getpinfo(char *host){
    int pid;
    char cpucmd[255];
    FILE *pipe;
   
    pid=getpid();
    sprintf(cpucmd, "ps -p %d -L -o cmd,thcount,pid,tid,pcpu,pmem,time,size,psr", pid);
    printf("[%s]\n", host);
    pipe=popen(cpucmd, "w");
    pclose(pipe);

    /*
    char pidcmd[255];
    sprintf(pidcmd, "pidstat  -tuwr -p %d", pid); 
    pipe=popen(pidcmd, "w");
    pclose(pipe);
    */
}