timing loop

[ruval002]

im having trouble timing my loop,

note, this is just part of my main file

#include <iostream>
#include<sys/time.h>

struct timeval tv1, tv2;
  struct timezone tz1,tz2;
  long totalT;
  int const times = 500;

gettimeofday(&tv1, &tz1);

for ( int i = 0; i times; i++)
{
//do something, 
}

gettimeofday(&tv2, &tz2);

 totalT = (tv2.tv_sec - tv1.tv_sec) * 1000000
    + (tv2.tv_usec - tv1.tv_usec);

   cout << "the time it took was: " << totalT << "us" << endl;

when i do my loop for 400 times it does seem to work correctly, but when i do it for more than 500 times it doesnt give me anything, any help on solving this?

[WaltP]

Try printing all the values to see which ones are wrong...

[ruval002]

Try printing all the values to see which ones are wrong...

they all print correctly

[WaltP]

Then I have no idea what you're asking since the problem as you stated it is cryptic at best. Try giving us some details that explain exactly what is going on.