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Threads in os - Meaning of thread.
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9/18/24, 1:51 Threads in os - Meaning ofPM thread.
Threads in Operating System
A thread is a flow of execution through the process
code, with its own program counter that keeps track of which
instruction to execute next, system registers which hold its
current working variables, and a stack which contains the
execution history.
i.e,Thread is a sequential flow of tasks within a process. Threads in OS can be
of the same or different types. Threads are used to increase the performance of
the applications.
Each thread has its own program counter, stack, and set of registers. But the
threads of a single process might share the same code and data/file. Threads
are also termed as lightweight processes as they share common resources.
Eg: While playing a movie on a device the audio and video are controlled
by different threads in the background.
Components of Thread
A thread has the following three components:
1. Program Counter
2. Register Set
3. Stack space
Why do we need Threads?
Threads in the operating system provide multiple benefits and improve the
overall performance of the system. Some of the reasons threads are needed in the
operating system are:
• Since threads use the same data and code, the operational cost
between threads is low.
• Creating and terminating a thread is faster compared to creating
or terminating a process.
• Context switching is faster in threads compared to processes.
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