Give a brief discussion on schedulers & Dispatchers with
respect to process management.
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Answer / sreekanth gurram
basically schedulers are of 3 types.1)long term scheduler
2)short term scheduler
3)medium term scheduler
long term scheduler selects the processes which are in the
disk(input queue)and load them in to the main memory.
The short term scheduler selects the processes in the main
memory which are waiting for cpu and allocate them to the
cpu for execution.The medium term scheduler selects the jobs
which are waiting for the I/O devices and remove them from
the contest for the cpu and place them in the appropriate
device queue
DISPATCHER:
Another component involved in the CPU scheduling function is
the dispatcher.
The dispatcher is the module that gives control of the CPU
to the process selected by the short-term scheduler. This
function involves:
Switching context
Switching to user mode
Jumping to the proper location in the user program to
restart that program
The dispatcher should be as fast as possible, given that it
is invoked during
every process switch. The time it takes for the dispatcher
to stop one process
and start another running is known as the dispatch latency.
| Is This Answer Correct ? | 29 Yes | 0 No |
Answer / laxmi narayana.moru
scheduler:
schedulers are two types
1.long term scheduler(job scheduler)
2.short term scheduler(cpu scheduler)
job scheduler decides which process is to be loaded in
memory when more processes are in job pool.
short term scheduler decides which process is to be taken
the cpu time for execution when more processes are loaded
in memory.
dispatcher:
dispatcher is nothing but,which gives the control of the
cpu from one process to another process after completion of
process execution.
| Is This Answer Correct ? | 8 Yes | 0 No |
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