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confused about threads and cores.... pls read..

post #1 of 16
6/26/12 at 7:39am
Thread Starter 
let's say a dual core, having four threads, which also means every core is as strong as / can handle two threads.... so it has 4 threads
comparing it to a quad core, having 4 threads also, means every core can handle / as strong as a thread so it has 4 threads also..

so meaning a dual core having four threads is stronger than a quad core with 4 threads also...

assuming both have same clock speeds.... ex : 3.1GHZ... what would be their difference?

please answer... smile.gif
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post #2 of 16
6/26/12 at 9:05am
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A thread is a virtual core, and it won't be as powerful as a true core.
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post #3 of 16
6/26/12 at 9:29am
Quote:
Originally Posted by Kentthegamer View Post

let's say a dual core, having four threads, which also means every core is as strong as / can handle two threads.... so it has 4 threads
comparing it to a quad core, having 4 threads also, means every core can handle / as strong as a thread so it has 4 threads also..
so meaning a dual core having four threads is stronger than a quad core with 4 threads also...
assuming both have same clock speeds.... ex : 3.1GHZ... what would be their difference?
please answer... smile.gif

CPUs do not have threads. CPUs process threads. Threads is code that require processing.

CPUs have physical cores and these maybe implemented to create virtual cores. How each performs depends on the CPU design, the type of threads, and the number of threads.


CPUs are actually made up of many logical blocks that process threads. There are types of techniques and tricks to improve performance like fusing commands together, predicting the results, re-ordering commands, and replicating components that take longer.

Quote:
Originally Posted by lordj View Post

A thread is a virtual core, and it won't be as powerful as a true core.
A thread is small executable unit of a program that can be scheduled by an OS.
Edited by DuckieHo - 6/26/12 at 9:33am
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post #4 of 16
6/26/12 at 9:36am
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Quote:
Originally Posted by DuckieHo View Post

Quote:
Originally Posted by Kentthegamer View Post

let's say a dual core, having four threads, which also means every core is as strong as / can handle two threads.... so it has 4 threads
comparing it to a quad core, having 4 threads also, means every core can handle / as strong as a thread so it has 4 threads also..
so meaning a dual core having four threads is stronger than a quad core with 4 threads also...
assuming both have same clock speeds.... ex : 3.1GHZ... what would be their difference?
please answer... smile.gif

CPUs do not have threads. CPUs process threads.

CPUs have physical cores and virtual cores. How each performs depends on the CPU design, the type of threads, and the number of threads.


CPUs are actually made up of many logical blocks that process threads. There are types of techniques and tricks to improve performance like fusing commands together, predicting the results, and replicating components that take longer.

Quote:
Originally Posted by lordj View Post

A thread is a virtual core, and it won't be as powerful as a true core.
A thread is small executable unit of a program that can be scheduled by an OS.
Quote:
In computer science, a thread of execution is the smallest unit of processing that can be scheduled by an operating system.

Directly quoted from http://en.wikipedia.org/wiki/Thread_%28computing%29

But the OP needs some easy explanation, doesn't he/she? I believe that if the CPU architecture/design and other factors are not taken into consideration, the 4 core CPU w/o HyperThreading will perform better than the dual core CPU w/ HyperThreading.
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post #5 of 16
6/26/12 at 9:45am
Quote:
Originally Posted by lordj View Post

But the OP needs some easy explanation, doesn't he/she? I believe that if the CPU architecture/design and other factors are not taken into consideration, the 4 core CPU w/o HyperThreading will perform better than the dual core CPU w/ HyperThreading.

That is correct in most cases if all else being the same.... EXCEPT if there are only 1-2 intensive threads. In that case, the two different CPUs perform virtually the same.
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post #6 of 16
6/26/12 at 9:53am
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Quote:
Originally Posted by DuckieHo View Post

Quote:
Originally Posted by lordj View Post

But the OP needs some easy explanation, doesn't he/she? I believe that if the CPU architecture/design and other factors are not taken into consideration, the 4 core CPU w/o HyperThreading will perform better than the dual core CPU w/ HyperThreading.

That is correct in most cases if all else being the same.... EXCEPT if there are only 1-2 intensive threads. In that case, the two different CPUs perform virtually the same.

Ah. What are intensive threads? Still leaning about this whole hardware thing, so forgive my ignorance. Do you mean there are four threads, and only 1-2 of them are being fully used?
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post #7 of 16
6/26/12 at 12:05pm
Quote:
Originally Posted by lordj View Post

Ah. What are intensive threads? Still leaning about this whole hardware thing, so forgive my ignorance. Do you mean there are four threads, and only 1-2 of them are being fully used?


Threads are like work requests. They are not used.... they are the ones that use resources!


Not all threads are equal. Some threads may not require much CPU time and some thread may need a lot.


Let's say you have a a thread that utilizes 100% of one core while the rest of the threads are handled in time by the other core.... would you benefit from a quad vs dual core in this case?
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post #8 of 16
6/27/12 at 2:30am
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post

CPUs do not have threads. CPUs process threads. Threads is code that require processing.
CPUs have physical cores and these maybe implemented to create virtual cores. How each performs depends on the CPU design, the type of threads, and the number of threads.
CPUs are actually made up of many logical blocks that process threads. There are types of techniques and tricks to improve performance like fusing commands together, predicting the results, re-ordering commands, and replicating components that take longer.
A thread is small executable unit of a program that can be scheduled by an OS.

so, the quad is faster? rolleyes.gif.. i guess that's it..

thanks mr.mod, anyways my future cpu will be an i3 2100 which is actually stronger than some quads both intel and amd.... so i assume it like a quad-core lol thumb.gif
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post #9 of 16
6/27/12 at 3:03am
Quote:
Originally Posted by Kentthegamer View Post

so, the quad is faster? rolleyes.gif.. i guess that's it..
thanks mr.mod, anyways my future cpu will be an i3 2100 which is actually stronger than some quads both intel and amd.... so i assume it like a quad-core lol thumb.gif

it doesn't really work that way. you can't say that a dual core CPU that have 2 threads a quad core.

you have two types of CPUs.
1- CPU with threads.
2- CPU without threads.

example of CPU without threads:-

a dual core CPU have 2 cores.
a tri-core CPU have 3 cores.
a quad core CPU have 4 cores.
a hexsa core CPU have 6 cores.
a octo-core CPU have 8 cores.

example of CPU with threads:-

a dual core CPU have 2 cores and 2 threads.
a tri-core CPU have 3 cores and 3 threads.
a quad core CPU have 4 cores and 4 threads.
a hexsa core CPU have 6 cores and 6 threads.
a octo-core CPU have 8 cores and 8 threads.

some CPUs have 12 threads that doesn't mean its a 12 core CPU.

for example a 3930 has 6 physical cores and 6 threads or (virtual cores). which means you can process 12 things at once. but that doesn't mean its as powerful as a 12 physical core CPU.

it all goes down to 2 things.
1- how good of an architecture is the CPU.
2- how well does a software utilize the cores and threads.

you can get a 64 cores cpu and get a quad core cpu and run a software on each of them and finds out that the quad core preform the same as 64 core cpu. why?

well the software might not be able to utilize all 64 cores.
another reason might be that the quad core architecture is better than the 64 cores CPU. keep in mind that is kind of extreme example.

I hope that helped.
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post #10 of 16
6/27/12 at 3:11am
Thread Starter 
Quote:
Originally Posted by Fantasy View Post

it doesn't really work that way. you can't say that a dual core CPU that have 2 threads a quad core.
you have two types of CPUs.
1- CPU with threads.
2- CPU without threads.
example of CPU without threads:-
a dual core CPU have 2 cores.
a tri-core CPU have 3 cores.
a quad core CPU have 4 cores.
a hexsa core CPU have 6 cores.
a octo-core CPU have 8 cores.
example of CPU with threads:-
a dual core CPU have 2 cores and 2 threads.
a tri-core CPU have 3 cores and 3 threads.
a quad core CPU have 4 cores and 4 threads.
a hexsa core CPU have 6 cores and 6 threads.
a octo-core CPU have 8 cores and 8 threads.
some CPUs have 12 threads that doesn't mean its a 12 core CPU.
for example a 3930 has 6 physical cores and 6 threads or (virtual cores). which means you can process 12 things at once. but that doesn't mean its as powerful as a 12 physical core CPU.
it all goes down to 2 things.
1- how good of an architecture is the CPU.
2- how well does a software utilize the cores and threads.
you can get a 64 cores cpu and get a quad core cpu and run a software on each of them and finds out that the quad core preform the same as 64 core cpu. why?
well the software might not be able to utilize all 64 cores.
another reason might be that the quad core architecture is better than the 64 cores CPU. keep in mind that is kind of extreme example.
I hope that helped.

Quote:
Originally Posted by DuckieHo View Post

CPUs do not have threads. CPUs process threads. Threads is code that require processing.
CPUs have physical cores and these maybe implemented to create virtual cores. How each performs depends on the CPU design, the type of threads, and the number of threads.
CPUs are actually made up of many logical blocks that process threads. There are types of techniques and tricks to improve performance like fusing commands together, predicting the results, re-ordering commands, and replicating components that take longer.
A thread is small executable unit of a program that can be scheduled by an OS.

yep, now i see... thanks for the knowledge and very detailed explanation..
and i can't deny what i said, it's really true, and it is a strong cpu...

besides i'd be standing corrected if my statement is false... really, anyways i can't provide u sum benches coz im in a hurry ryt now lol tongue.gif

thank you so much.
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