CODEWITHSUNDEEP
multithreadingoperating-systemthread-safetypthreads
Laavaa
Laavaa

Reputation: 575

Multithreading,blocking and semaphores

(1) In a multi-threaded process,If one thread is busy on I/O will the entire process be blocked?

(2) Which is better to use a mutex or a binary semaphore ? When should I use a mutex and when should I use a binary Semaphore ?

Upvotes: 0

Views: 200

Answers (2)

Harman
Harman

Reputation: 1581

1) In a SMP environment multiple thread can run in parallel(on different cpu). In a single CPU environment, only one thread would be running at a time.

2) read this diff-binary-semaphore-and-mutex

Upvotes: 0

Rohit Jain
Rohit Jain

Reputation: 213351

1). Well, at a time only one thread is allocated the CPU in multithreaded application. If you are saying that your thread is regularly busy with I/O, then practically it can happen that all other threads keep waiting in queue to get CPU allocated to them. It depends upon the CPU allocation algorithm used. Like if thread are using Time-Sharing algorithm, then of course on completion of time, current thread will be send to the back of the queue.

2). Check out this post: - Difference between binary semaphore and mutex

Upvotes: 1

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