Setting Parallelism

Deepika Sahu answered on December 29, 2022 Popularity 1/10 Helpfulness 1/10

answer Setting Parallelism

Setting Parallelism

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class SettingParallelism {

	public static void main(String[] args) throws InterruptedException, ExecutionException {
		
		System.out.println(Runtime.getRuntime().availableProcessors());
		
		System.setProperty("java.util.concurrent.ForkJoinPool.common.parallelism", "2");
		
		System.out.println(ForkJoinPool.getCommonPoolParallelism());
		
		ForkJoinPool pool = new ForkJoinPool(2);
		
		List<Employee> list = new ArrayList<>();
		
		for (int i = 0; i < 100; i++) {
			list.add(new Employee("John", 20000));
			list.add(new Employee("Rohn", 3000));
			list.add(new Employee("Tom", 15000));
			list.add(new Employee("Bheem", 8000));
			list.add(new Employee("Shiva", 200));
			list.add(new Employee("Krishna", 50000));
		} 
		
		long count = pool.submit(() ->
		list.parallelStream()
		.filter(e -> e.getSalary() > 1000)
		.count()).get();
		
		System.out.println(count);

		//Computational Intensive
		
//		Number of threads <= number of cores
		
		//IO intensive
		
//		Number of threads > Number of cores
	}

}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java setting

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Contributed on Dec 29 2022

Deepika Sahu

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