What does Linux PS State sl+ mean __linux

Here's a piece of Java code,

public class Z {
public static void Main (string[] args)
{
New Z ();
}
Private Z ()
{
Z A1=this;
Z A2=this;
Synchronized (A1)

{

try {
A2.wait ();
System.out.println ("Done Waiting");
}
catch (Interruptedexception e)
{
System.out.println ("Interruptedexception");
}
catch (Exception e)
{
System.out.println ("Exception");
}
Finally
{
System.out.println ("finally");
}
}
System.out.println ("All done");
}

}

Run after compiling

Java Z

Without any output, the program will not end.

PS looked at the state, found that the state is sl+,

In Linux, the status is as follows:

D non-disruptive uninterruptible sleep (usually IO)
R is running, or the process in the queue
S is in a dormant state
T stop or be traced
Z Zombie Process
W enters memory Exchange (invalid starting from kernel 2.6)
X dead Process

< high-priority
N Low Priority
L Some pages are locked into memory
s contains child processes
+ Group of processes in the background
L multi-threading, cloning threads

Based on the above information, it is known that it is in hibernation, multithreading, and is a background process.

We know that in Java,

Wait (): Leave the thread in the waiting state. The thread will then release the lock. Coexist into the thread pool.
Notify (): Usually wakes up the first one in the thread pool.
Notifyall (): Wakes all waiting threads in the thread pool.

So while waiting, this thread sleeps and waits for other threads to notify, so it's dormant.

Reprint please indicate the source:

Original: http://blog.csdn.net/hongchangfirst/article/details/8650628

Author: Hongchangfirst