Files:

------------ clock_testfile ----------------------

a test file for clock algorithm with 4 pages of 
32 bytes each and time interval set to 4. Does the following:

loads 4 pages in the 4 frames:
  read page 0
  read page 1
  read page 2
  read page 3

Note that since time interval is set to 4, all read bits will be clear
after these four lines. 
Next the first three pages are accesses - this makes sure the read bits
are set and the read bit for page 3 is not set:

  read page 0
  read page 1
  read page 2

Now we repeat 5 times:
  read page 4
  read page 0
  read page 1
  read page 2
  read page 5
  read page 0
  read page 1
  read page 2

At the beginning of this loop, page 4 must be placed somewhere,
since the read bit is set for pages 0,1 and 2, it ends up in physical
page 3. Next pages 0,1 and 2 are accessed (all HITS). 
Then page 5 is accessed - once again it is placed in physical page
3, then pages 0,1 and 2 are accessed again (to prevent them from
being booted).

The overall result is that there are the four initial faults, then
every access to pages 4 and 5 is a fault, for a total of 14 faults.

> ./hw4 -n 4 -t 4 -p 32 -a clock < clock_testfile
Page Size: 32
# page frames: 4
Replacement Algorithm: clock
Lines processed: 47
Memory operations: 47
Faults: 14

If we change the number of page frames to 8, each virtual page causes
a single page fault (total of 6 faults):

./hw4 -n 8 -t 4 -a clock < clock_testfile
Page Size: 32
# page frames: 8
Replacement Algorithm: clock
Lines processed: 47
Memory operations: 47
Faults: 6