FULL PRODUCT VERSION :
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [版本 10.0.10586]

EXTRA RELEVANT SYSTEM CONFIGURATION :
notebook computer 
ASUS A550JK 
CPU:Intel(R) Core(TM) i7-4710HQ @2.50GHz

A DESCRIPTION OF THE PROBLEM :
If there are some threads(less than the number of computer's logic cpus) working with a endless loop(in that loop:increases an int variable(eg: ++i) and makes a comparison with '==',and has a volatile write), the function 'Thread.sleep' in other thread won't work correctly.

REGRESSION.  Last worked in version 8u77

ADDITIONAL REGRESSION INFORMATION: 
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Just execute the test

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The console will print the sleep time per half-second:
sleep time:0            vInt:0
sleep time:501          vInt:20982098
sleep time:500          vInt:41807469
sleep time:500          vInt:65160899
sleep time:501          vInt:90615990
sleep time:500          vInt:115868104
sleep time:501          vInt:134387463
sleep time:500          vInt:157016031
sleep time:500          vInt:177084187

ACTUAL -
It takes a long time(it's 96 seconds in this test) to print the third printout, means that it slept 96 seconds rather than 0.5 second
sleep time:0            vInt:0
sleep time:501          vInt:19474440
sleep time:96389                vInt:103
sleep time:500          vInt:23039342
sleep time:500          vInt:43348896
sleep time:501          vInt:64601276
sleep time:500          vInt:90043833
sleep time:500          vInt:108501281
sleep time:501          vInt:131417790
sleep time:500          vInt:153950317

And the running jvisualvm.exe will frozen once this test start.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class SleepTest {
	private static volatile int vInt = 0;
	public static void main(String[] args){
		for(int n=0;n<2;n++){
			new Thread(){
				public void run() {
					int l=0,m=0;
					while(true){
						if(++l==0){
							if(++m == 0)
								//insure that it won't be optimized away
								System.out.println(l);
						}
						vInt=l;
					}
				}
			}.start();
		}
		long oldTime = System.currentTimeMillis();
		while(true){
			System.out.println("sleep time:"+(-oldTime+(oldTime = System.currentTimeMillis()))+"\t\tvInt:"+vInt);
			try {
				Thread.sleep(500);
			} catch (InterruptedException e) {}
		}
	}
}
---------- END SOURCE ----------