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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.
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