Operating Systems Part 3 : Synchronization and Deadlock

Evaluate whether the lock variable satisfies progress, noting it does not satisfy mutual exclusion, and that only a process in the critical section may block others; therefore, progress is satisfied.

Analyze a lock variable to see if bounded waiting holds: it provides progress but fails mutual exclusion and bounded waiting, causing possible starvation as one process repeatedly enters critical sections.

Explore the test and set lock (TSL) as an atomic instruction that prevents preemption between load and store, ensuring mutual exclusion during entry to the critical section, and discussing disadvantages.

Explain the TSL synchronization mechanism (test and set lock) that achieves mutual exclusion without preemption, its hardware dependent nature, and how initial and updated lock values control entry.

Explore the TSL synchronization mechanism as a busy-waiting solution for multiple processes, using entry and exit sections, and requiring hardware support unlike the lock variable.

The strict alternation synchronization for two processes uses a turn variable with entry and exit sections to enforce mutual exclusion in the critical section, but progress is not guaranteed.

Explore strict alternation as a synchronization mechanism, showing that bounded waiting and mutual exclusion are guaranteed, but progress is not guaranteed.

Analyze the Peterson synchronization mechanism to show progress is guaranteed under all values of P0 and P1, by satisfying the first and second conditions for entering the critical section.