This is a toy program to play with cache line alignment.

The program iterates over a 2D array and modify the elements, and record
the time it takes for the traversal.
Each array row has a tailing padding of OFF*4 bytes (i.e. OFF x sizeof(int)).
The padding elements are NOT traversed, they are only there to make the array
misaligned.

The makefile builds 17x binaries with OFF = 0...16. The testall.sh script
runs each of them 100 times and print the averaged output.

Build:
$make

run:
$sh testall.sh


Play around: change the demensions of the array and the loop operations.