Critical Section Problem

A critical section is a code segment that accesses shared variables and has to be executed as an atomic action.

Critical section problem. A critical section is one of the sections among different segments of the operating system. The critical section problem. So we can say that a big operating system consists of many segments or sections.

Mutual exclusion implies that only one process can be inside the critical section at any time. For example process a changing the data in a memory location while another process b is trying to read the data from the same memory location. It means that in a group of cooperating processes at a given point of time only one process must be executing its critical section.

That resource may be any resource in a computer like a memory location data structure cpu or any io device. Critical section contains shared variables or resources which are needed to be synchronized to maintain consistency of data variable. Rules for critical section.

When more than one processes access a same code segment that segment is known as critical section. How process synchronization works. It cannot be executed by more than one process at a time.

Access to the critical section is limited to n processes instead of one process execution of the critical section by processes is mutually exclusive in time. The critical section problem concurrent software systems 2 problem description informally a critical section is a code segment that accesses shared variables and has to be executed as an atomic action. Critical section problem a piece of code inside a process that wants access to shared resources and that need not be executed while another process is in a corresponding section of code.

Critical section problem in os. Consider system of n processes p0 p1 pn 1 every process has critical section segment of code process may be changing common variables writing file updating table etc. This protected section is the critical section or critical region.