The document discusses task synchronization and issues that can arise related to shared resources in a multitasking environment. Task synchronization ensures processes are aware of how shared resources are being accessed to prevent conflicts like racing conditions and deadlocks. Racing conditions occur when multiple processes attempt to perform operations on shared resources simultaneously. Deadlocks happen when processes are waiting for resources held by other waiting processes, resulting in a circular wait. The document outlines techniques for detecting and handling deadlocks like maintaining a resource graph and breaking deadlock cycles.

1. Task Synchronization Issues
By,
Pukkalla Suraj Nageswararao
Usn : 1AY20CS115

2. Task
Synchronization
The act of making the
processes aware of the
access of shared resources
by each process to avoid
conflicts is known as
“Task/ Process
Synchronization”.

3. Task/ Process Synchronization is essential for :
1. Avoiding conflicts in resource access (racing, deadlock,etc.)
In multitasking environment.
2. Ensuring proper sequence of operation across processes.
3. Establish proper communication between processes.

4. ISSUES

5. RACING

7. Definition : A race condition is an undesirable
situation that occurs when a device or a system
attempts to perform 2 or more operations at the
same time

8. TUG OF WAR

9. DEADLOCK

11. o Conditions Favoring Deadlock:
1.) Mutual Exclusion
2.) Hold and Wait
3.) No resource preemption
4.) Circular wait

12. HANDLING DEADLOCKS
1.) Ignore deadlock

13. 2.) Detect and Recover

14. Operating Systems keep a resource graph in their
memory.
The resource graph is updated on each resource
request and release.
A deadlock condition can be detected by analyzing
the resource graph by graph analyzer algorithms.
Once a deadlock condition is detected, the system
can terminate a process or preempt the resource to
break the deadlocking cycle.

15. ● Avoid Deadlocks: Deadlock is avoided by the
careful resource allocation techniques by the
Operating System. It is similar to the traffic
light mechanism at junctions to avoid the
traffic jams.
● Prevent Deadlocks: Prevent the deadlock
condition by negating one of the four
conditions favoring the deadlock situation

16. ● Ensure that a process does not hold any other
resources when it requests a resource. This can
be achieved by implementing the following set of
rules/ guidelines in allocating resources to
processes.
1. A process must request all its required resource and
the resources should be allocated before the process
begins its execution.
2. Grant resource allocation requests from processes
only if the process does not hold a resource currently

17. Thank you.