1)
g++ 01_locality.cc
	examine code, run & check output
	Why is there time difference?

2)
g++ -std=gnu++11 02_false_sharing_align.cpp -lpthread

	run with different alignments
	time ./a.out 4
	time ./a.out 8
	time ./a.out 12
	time ./a.out 16
	...
	Why is there time difference?

3)
In (1) and (2), does optimization change things?

