Fill in the Appropriate YN and Why or Why not columns in the

Fill in the \"Appropriate (Y/N?)\" and \"Why or Why not?\" columns in the table shown below- for the following synchronization methods:

Solution

Spinlock

Single Processor:

Approriate - N

Why - A spin lock on a single processor system will waste resources, slowing down the owner of the lock. It can also lead to a deadlock.

Multip-Processor:

Appropriate - Y

Why - A spinlock is prefferable on a multi-processor system since spinlocks are useful when another process can execute while one is spinning on the lock.

Disable interupts:

Single processor:

Appropriate - Y

Why - Disabling means that a process disables interrupts before entering the critical section and enables the interrupt immediately after exiting the critical section.
On a uniprocessor or single core processor, disabling interrupts disables interrupts for the entire system until the programmer re-enables interrupts.

Multi-Processor:

Appropriate - N

Why - In multi-processor system, each CPU/core execute code simultaneously, so whether the current CPU has disabled interrupts has nothing to do to avoid other CPU from entering the same region.

Blocking wait queue:

Single Processor:

Appropriate - Y

Why - Sometimes the system may have to wait on some I/O operations. This will work the same in single as well as multi processor systems.

Multi-Processor:

Appropriate - Y

Why - Sometimes the system may have to wait on some I/O operations. This will work the same in single as well as multi processor systems.