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please help me.. i want to know how to make a cpu scheduling system using visual basic 6.0 .. hope you can help me..
thanks and advance happy new year to all..
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#2
Posted 03 January 2009 - 05:15 PM
dargueta
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Why are you using Visual Basic for this? VB is ill-suited to low-level stuff, especially OS work. Your scheduling system depends on a few things:
1)What operating system
2)What computer system (i.e. IBM-compatible, some weird thing, etc.)
3)How many processors are on the system
4)What scheduling algorithm you want to use
Algorithm Types
Preemptive: The OS interrupts a process before it's finished executing to give another one execution time.
Non-preemptive: A process executes until it finishes, at which time another process is given the CPU.
Scheduling Algorithms
Round-Robin: (Preemptive) Each process on the CPU gets a predetermined time slice (usually on the order of a dozen or so milliseconds), and the scheduler just loops through a list of threads endlessly. Most modern OSes use something like this.
First-In-First-Out: (Non-preemptive) Basically like a line at a checkout counter.
Priority-Based: (Either, can be combined with Round-Robin or FIFO) Processes are executed in order of priority, determined somehow. For example, system processes are typically at a higher priority than user programs.
Shortest First: (Non-preemptive) The job that will take the shortest amount of time to complete will be executed first. This isn't used much anymore.
Multi-Level Feedback Queue: Multiple priority levels, each with it's own scheduling algorithm, time quantum, etc.
Seriously, unless you're just doing a simulator, this is waaay beyond VB.
1)What operating system
2)What computer system (i.e. IBM-compatible, some weird thing, etc.)
3)How many processors are on the system
4)What scheduling algorithm you want to use
Algorithm Types
Preemptive: The OS interrupts a process before it's finished executing to give another one execution time.
Non-preemptive: A process executes until it finishes, at which time another process is given the CPU.
Scheduling Algorithms
Round-Robin: (Preemptive) Each process on the CPU gets a predetermined time slice (usually on the order of a dozen or so milliseconds), and the scheduler just loops through a list of threads endlessly. Most modern OSes use something like this.
First-In-First-Out: (Non-preemptive) Basically like a line at a checkout counter.
Priority-Based: (Either, can be combined with Round-Robin or FIFO) Processes are executed in order of priority, determined somehow. For example, system processes are typically at a higher priority than user programs.
Shortest First: (Non-preemptive) The job that will take the shortest amount of time to complete will be executed first. This isn't used much anymore.
Multi-Level Feedback Queue: Multiple priority levels, each with it's own scheduling algorithm, time quantum, etc.
Seriously, unless you're just doing a simulator, this is waaay beyond VB.
#4
Posted 27 February 2009 - 01:35 PM
Aram
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Hey Guys.. I Need Some Help Here !!!
does any one know The Code ( by any language! ) for each of the types of cpu schedualing algorithm types!?!? ... if u know them please let me know ... and im hurry to get this codes...
i mean the code that works like the algorithm type !! Thank You ... :001_unsure:
does any one know The Code ( by any language! ) for each of the types of cpu schedualing algorithm types!?!? ... if u know them please let me know ... and im hurry to get this codes...
i mean the code that works like the algorithm type !! Thank You ... :001_unsure:
#5
Posted 27 February 2009 - 01:38 PM
dargueta
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What kind of CPU scheduling algorithm? Priority-based or round-robin? FIFO, LIFO, fastest job first? We need more info here. And why doesn't the language matter?
C++ CPU scheduling algorithm demo
C++ CPU scheduling algorithm demo
#6
Posted 27 February 2009 - 01:49 PM
Aram
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i want seven of them ( FCFS, SJF, Priority, Preemptive, RR, Multi level Queue, Multi level feed back Queues ) and for the language! i just need the idea! if it written like:
Begin
get queue
get x job in queue...etc
End
i will understand wots going on ... then i need the idea! dats y ... thank u for help
Begin
get queue
get x job in queue...etc
End
i will understand wots going on ... then i need the idea! dats y ... thank u for help
#7
Posted 27 February 2009 - 01:52 PM
dargueta
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This reeks of homework. I suggest you do the reading you've been assigned, Aram.
Scheduling Algorithms (basic intro)
CPU Scheduling - Wikipedia (this has a ton of detailed algorithm descriptions)
Scheduling Algorithms (basic intro)
CPU Scheduling - Wikipedia (this has a ton of detailed algorithm descriptions)
#8
Posted 27 February 2009 - 01:57 PM
Aram
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hahaha ... yes u r r8 ... its for a homework ...
many thx for ur help! and dont worry im best of my class :rolleyes:
btw i suprise when i saw ur age!!?! WD 2 u ... thx again
many thx for ur help! and dont worry im best of my class :rolleyes:
btw i suprise when i saw ur age!!?! WD 2 u ... thx again
#10
Posted 07 March 2009 - 03:43 PM
dargueta
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Writes binary right handed and hex left handed
You're welcome.
