What is Thread ?

• A thread is a lightweight sub-process, the smallest unit of processing or a basic unit of CPU utilization.

• It consist a program counter(PC), stack space, set of registers and a thread ID

• Threads are the entities scheduled for execution on the CPU.

• A thread is a single series stream within in a process.

• Each thread has its own stack.

• Threads are dependent of one other.

• Threads helps the other threads in operating system.

• If one thread is blocked then, another thread does not affected it proceed without blocking..

• Threads shares common memory space.

• Context switching are fast in threads.

• A thread uses parallelism, which provides a way to improve application performance.

Multithreading Models in operating-system

• Many-To-One Model

• One to One Model

• Many to Many Model

Advantages of Operating System Multi-Threading

• Threads minimize the context switching time.

• Use of threads provides concurrency within a process.

• Efficient communication.

• It is more economical to create and context switch threads.

• Threads allow utilization of multiprocessor architectures to a greater scale and efficiency.

• Improved server responsiveness.

• Minimized system resource usage.