This presentation discusses threads, which are the basic unit of CPU utilization and a component of a process. There are two types of threads: user level threads, which are implemented in user libraries and are not known to the OS kernel, and kernel level threads, which are created and managed by the OS kernel. The presentation covers the uses, advantages, and disadvantages of threads, such as improving performance and maximizing CPU utilization through parallel processing, but threads may also cause security issues or idle CPUs during blocking periods.

1. PRESENTATION ON
THREAD
PRESENTED BY:
NAME: SALEH IBNE OMAR
ID: 2017000000040
COURSE: OPERATING SYSTEMS
SECTION: 01

2. THREAD INTRODUCTION
▪ A flow of execution through process code
▪ Basic unit of CPU utilization
▪ Component of process
▪ Consists of a program counter, stack, set of registers,
and ID
▪ Can be single or multiple
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3. USES OF THREAD
▪ To improve program performance
▪ To maximize CPU utilization
▪ Make good use of parallel processing
▪ To reduce resource usage
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4. TYPES OF THREAD
▪ User Level Threads (ULT)
▪ Kernel Level Threads (KLT)
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5. USER LEVEL THREAD
▪ Implemented in user level libraries
▪ Does not call OS for context switching
▪ Is not known to OS Kernel
▪ Platform independent
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6. KERNEL LEVEL THREAD
▪ Created and managed by OS Kernel
▪ Is known to OS Kernel
▪ Can be multithreaded
▪ Runtime system is not needed
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7. Single-Threaded Process
THREAD USAGE OF PROCESS
Multi-Threaded Process
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8. MULTI-THREADING MODELS
One to One Many to One Many to Many
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9. ADVANTAGES OF THREAD
▪ Faster context switching
▪ Minimizes resource usage by resource sharing
▪ Provides concurrency within a process
▪ Effectively utilizes multiprocessor system
▪ Makes communication between multiple threads easier
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10. DISADVANTAGES OF THREAD
▪ May cause security issues
▪ Blocking of a parent thread will stop all the child threads
▪ CPU may remain idle during blocking period
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11. THREAD EXAMPLES OF OS
▪ Windows XP threads
▪ Linux threads
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12. THANK YOU!
Have Any questions?
FEEL FREE TO RAISE
YOUR HAND.
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