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coderplay / TestMemoryAccessPatterns.java

Last active December 10, 2015 15:18

on-heap array vs off-heap array

	public class TestMemoryAccessPatterns {
	private static final int LONG_SIZE = 8;
	private static final int PAGE_SIZE = 2 * 1024 * 1024;
	private static final int ONE_GIG = 1024 * 1024 * 1024;

	private static final int ARRAY_SIZE = (int) (ONE_GIG / LONG_SIZE);
	private static final int WORDS_PER_PAGE = PAGE_SIZE / LONG_SIZE;

	private static final int ARRAY_MASK = ARRAY_SIZE - 1;
	private static final int PAGE_MASK = WORDS_PER_PAGE - 1;