Why does the Linux process sleep?

The reasons why the Linux process sleeps are: 1. When the process needs to access a resource but is being occupied by other processes, it waits for the resource to be released; 2. When the process needs to wait for the occurrence of a certain event, such as waiting for the user Input, wait for network data, etc., until an event occurs; 3. If the process has a lower priority or other high-priority processes are running, enter the sleep state and wait for the scheduler to reallocate time slices, etc.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

The reasons why a Linux process sleeps are as follows:

1. Waiting for resources:

When a process needs to access a resource, but the When resources are currently occupied by other processes, the process may choose to enter sleep state and wait for the resources to be released.

2. Waiting for events:

When a process needs to wait for an event to occur, such as waiting for user input, waiting for network data, etc., the process may choose to go to sleep. state until the event occurs.

3. Scheduling strategy:

The operating system will determine the running time of the process based on the priority of the process and the scheduling algorithm. If the process has a lower priority or other high-priority processes are running, the process may choose to enter the sleep state and wait for the scheduler to reallocate the time slice.

4. Timer:

The process may use a timer to implement some scheduled tasks. When the timer expires, the process will enter sleep state and wait for timing. A server event occurs.

It should be noted that entering the sleep state of a process does not mean that the process stops running completely, but that it is temporarily suspended and waits for a certain condition to be met before continuing execution.

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