Hi guys, I've started dealing with high C programming level over operating system manipulations; what I'm confused in is, the concept of "process" ; how does multiple process/threads run simultaneously in parallel?! I'm trying to convert that concept in real life but there's no things are carrying out simultaneously in parallel ...and if someone has any analogous for that then it would be much appreciated to tell me about it.
thanks
LMGTFY
The first link looks good: Concurrency and Parallelism in the Real World - LispCast
And if you look around, you'll find a lot of real-life examples of the type of concurrency that typically happens in a multi-tasking OS: traffic signals, waiting in line (queue) at the bank or restaurant, etc.
but for example waiting in a line at bank, if I came late then I will sit and wait .. but for people who arrived before, they are already awaiting.Originally Posted by christop
so my question, concurrency and parallelism doesn't mean that all process must "initialize" at the same time? it just mean that they are running in the same time regardless if one started before the other?!
Did you even read the article that christop linked to?
Seriously though, why are you still trying to find perfect real world analogies? All analogies must fail in some way, otherwise they would be the thing itself. So if you insist on analogies, try understanding the similiar idea conveyed by the analogy, and ignore whatever doesn't fit. If you cannot do that then stop seeking analogies.
Look up a C++ Reference and learn How To Ask Questions The Smart Way
> how does multiple process/threads run simultaneously in parallel?
It's faked.
The same way that a film at the cinema is perceived to be in motion, whereas it's just a series of static images being displayed quickly.
The same way that a car engine is perceived to emit a continuous sound, whereas it's just a rapid sequence of discrete explosions.
If you examine anything with a sufficiently short clock or rule, you will eventually find granularity where you previously observed continuity.
> but there's no things are carrying out simultaneously in parallel
So you've never been to a supermarket checkout line then?
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
alright thanks!
Of course he didn't. He never reads anything and certainly never understands anything.
He is a spamming troll.
His account should be deleted.
A little inaccuracy saves tons of explanation. - H.H. Munro
