DS 642: Parallel Computing Lecture 6

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What is the purpose of synchronization in parallel computing?

To allocate memory efficiently for each thread

To speed up the execution of threads

To impose order constraints and protect access to shared data (correct)

To increase the number of threads running simultaneously

What does mutual exclusion achieve in parallel computing?

Ensures only one thread can enter a critical region at a time (correct)

Speeds up the execution of threads in a parallel environment

Allows multiple threads to access shared data simultaneously

Increases the chances of deadlock occurrence

What does the 'critical' keyword indicate in OpenMP parallel computing?

It speeds up the overall performance by minimizing synchronization

It allows threads to freely access shared resources without restrictions

It specifies a region where all threads must execute simultaneously

It signifies a region where only one thread can execute at a time (correct)

How does synchronization affect the performance of parallel programs?

Synchronization can introduce overhead but ensures correct execution order Signup and view all the answers

Why is mutual exclusion important in parallel computing systems?

To avoid conflicts that arise from simultaneous access to shared resources Signup and view all the answers

What is the primary purpose of using synchronization in parallel computing?

To impose order constraints and protect access to shared data Signup and view all the answers

In the context of parallel computing, what does 'critical' refer to?

A keyword used for mutual exclusion in critical regions Signup and view all the answers

Why is mutual exclusion important in parallel computing systems?

To ensure only one thread accesses a critical region at a time Signup and view all the answers

What does the OpenMP directive 'omp_get_thread_num()' return?

The ID of the current executing thread Signup and view all the answers

How does synchronization contribute to managing shared data in parallel programs?

By imposing order constraints and protecting shared data access Signup and view all the answers

In parallel computing, what is the purpose of using synchronization?

To ensure shared data is accessed in a specified order Signup and view all the answers

What is the main function of mutual exclusion in parallel computing systems?

To ensure only one thread at a time can enter a critical region Signup and view all the answers

What does the 'critical' keyword signify in OpenMP parallel computing?

It enforces mutual exclusion for shared data access Signup and view all the answers

Why do threads in parallel computing systems have to wait their turn?

To prevent multiple threads from accessing shared data simultaneously Signup and view all the answers

What is the significance of mutual exclusion in protecting shared data in parallel programs?

It ensures that shared data is always consistent across all threads Signup and view all the answers

DS 642: Parallel Computing Lecture 6

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Questions and Answers

What is the purpose of synchronization in parallel computing?

What does mutual exclusion achieve in parallel computing?

What does the 'critical' keyword indicate in OpenMP parallel computing?

How does synchronization affect the performance of parallel programs?

Why is mutual exclusion important in parallel computing systems?

What is the primary purpose of using synchronization in parallel computing?

In the context of parallel computing, what does 'critical' refer to?

Why is mutual exclusion important in parallel computing systems?

What does the OpenMP directive 'omp_get_thread_num()' return?

How does synchronization contribute to managing shared data in parallel programs?

In parallel computing, what is the purpose of using synchronization?

What is the main function of mutual exclusion in parallel computing systems?

What does the 'critical' keyword signify in OpenMP parallel computing?

Why do threads in parallel computing systems have to wait their turn?

What is the significance of mutual exclusion in protecting shared data in parallel programs?

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