Why would we use a multi-threaded program instead of a single-threaded one?
To begin with, let’s define multithreading.
An operating system characteristic that allows applications to run in parallel with subcomponents or threads is known as multithreading.
Since they do not perform long-running operations, most programs require only one thread.
Multiple threads allow an application to distribute long-running tasks so that they can all be completed at the same time.
Since one thread is waiting for an IO operation, other tasks can use the available CPU.
This gives the user the impression that the program is running faster.
Worker threads can now run in parallel, allowing them to finish faster.
Advantages of multithreading
- Improved responsiveness.
Compared to single-threaded programs, users often notice improved responsiveness.
- Faster apps.
Using multiple threads can increase application speed.
Threads can be prioritized, allowing higher-priority activities to take precedence over lower-priority ones.
Advantages of single-threaded operation
- Programming and debugging.
Due to the lower complexity, programming and debugging are easier than with multi-threaded systems.
- Lower costs.
Nor do they add additional costs to the program, so there are fewer of them.
The following factors must be considered when creating a multi-threaded program
- When two threads share a monitor that the other requires, a deadlock occurs.
Each activity effectively blocks the other and both waits for the other monitor to become free.
As a result, the application is forced to crash.
- As the system analyzes whether accepting a resource request would put the system in an unsafe state, resource allocation is used to avoid deadlocks.
A deadlock can occur from an unsafe state.
The system only approves requests that lead to safe states.
- When several threads use the same object instance, thread synchronization is used.
Threads accessing the object can then be locked and synchronized so that only one job can interact with the static object.
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