public List<SplitMapperRealJvmCost> readRealMapperJvmCost(String dir) {
		List<SplitMapperRealJvmCost> list = new ArrayList<SplitMapperRealJvmCost>();
		
		File input = new File(dir);
		try {
			BufferedReader reader = new BufferedReader(new FileReader(input));
			String[] title = reader.readLine().split("\t");
			String line;
			while((line = reader.readLine()) != null) {
				String[] value = line.split("\t");
				SplitMapperRealJvmCost jvmCost = new SplitMapperRealJvmCost(title, value);
				if(jvmCost.getBytes() == jvmCost.getSplit())
					list.add(jvmCost);
			}
			reader.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return list;
	}