A process is predetermined program steps to
make it execute. For instance, when we write codes to run a program in C++ or C
and compile it using instructions, the compiler tends to generate binary codes.
The binary code and original codes are programs. When we actually try to run the
binary code, it eventually became a process. The following article is based on
to provide you with information regarding the process management. Students,
however, can find more details about every aspect of coding languages and CPU
management at programming assignment
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A
process is an ongoing entity, as opposed to the whole program, which is meant
to be a substantive entity. A single
program can create so many of processes that run on multiple fronts, for
instance when we try to execute a binary or .exe more than once, multiple
processes are created.
The process in the memory unit are
distributed under various sections such as stack, heap, data and text which are
described below:
Stack
selection: The stack is used to contain the temporary
data known to function the return addresses, parameters and local variables.
Text
Selection: A
series of process, sometimes termed as the text selection which consists of the
ongoing activity, represented using the data of Program counter.
Heap
Selection: It is dynamically allocated memory unit to
complete the process in its run time.
Data
Selection: The data partition in a memory unit that
comprises of global variables.
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The
process of Context Switching
The process of saving the whole context of
one process and loading the context for another process is termed as the
context switching. In the normal notion, it’s like unloading and loading the
process from running state to ready queue.
The situations that lead to context
switching are
1.
When a highly needed process
comes in the ready queue, for instance with the higher priority than the
ongoing process.
2.
When an interruption occurs.
3.
Kernel and User mode switch.
(it is not necessary)
4.
Pre-emptive CPU scheduling.
The difference between Context and Mode Switch
A
mode switch happens when CPU and its privilege level is altered, for instance
when a fault occurs or a system call is made. The Kernel of the system works in
privileged mode rather than working in a standard user task. If a switched user
process wants to access various things which are only accessible to the system kernel.
A mode switch occurs. In the process of the mode switch, the ongoing process
need not be changed. A mode switch generally occurs for a process of a context
switch to occur. Only the kernel has the administrative frequency to cause a
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