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Questions and Answers
What is the primary goal of Process Synchronization?
What is the primary goal of Process Synchronization?
Independent processes can affect the execution of other processes.
Independent processes can affect the execution of other processes.
False
What is the difference between concurrent and parallel processing?
What is the difference between concurrent and parallel processing?
Concurrent processing is when two or more tasks can start, run, and complete in overlapping time periods, while parallel processing is when tasks literally run at the same time.
A buffer that assumes a fixed buffer size is called a ______________ buffer.
A buffer that assumes a fixed buffer size is called a ______________ buffer.
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What is the section of code that implements the request to access a shared resource?
What is the section of code that implements the request to access a shared resource?
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Preemptive kernels allow a process to be preempted while it is running in user mode.
Preemptive kernels allow a process to be preempted while it is running in user mode.
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Match the following synchronization principles with their descriptions:
Match the following synchronization principles with their descriptions:
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What is the main difference between cooperating and independent processes?
What is the main difference between cooperating and independent processes?
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Study Notes
Process Synchronization
- Process synchronization is the coordination of multiple processes to ensure controlled access to shared resources.
- It aims to resolve race conditions and synchronization issues in concurrent systems.
Types of Processes
- Independent Process: execution of one process does not affect the execution of other processes.
- Cooperating Process: one process can affect or be affected by other processes in the system.
- Concurrent Process: multiple tasks can start, run, and complete in overlapping time periods.
- Parallel Process: tasks run at the same time, e.g., multicore processor.
Buffer Types
- Bounded Buffer: assumes a fixed buffer size.
- Unbounded Buffer: no practical limit on buffer size.
Critical Section
- A segment of code in each process that requires exclusive access to shared resources.
- Consists of three sections: entry, critical, and exit.
- Remainder section is the remaining code outside the critical section.
Critical Section Requirements
- Mutual Exclusion: only one process can execute in its critical section at a time.
- Progress: processes not executing in remainder sections can participate in deciding which enters the critical section next.
- Bounded Waiting: a limit on the number of times other processes can enter their critical sections before a request is granted.
Kernel Modes
- Preemptive Kernels: allow a process to be preempted while running in kernel mode.
- Nonpreemptive Kernels: do not allow a process to be preempted in kernel mode; it will run until it exits kernel mode, blocks, or yields control.
Solving Critical-Section Problems
- Operating system designers use software tools, such as mutex locks, to prevent race conditions and protect critical regions.
- Mutex is short for mutual exclusion, used to protect critical regions and ensure mutual exclusion.
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Description
Learn about process synchronization, its importance in multi-process systems, and how it prevents race conditions and other synchronization issues. Explore the concepts of independent and cooperating processes.
