dual core - dual processor - hyperthreading

I read this article :

http://news.com.com/Intel+highlights...tag=html.alert

We know that all applications cannot take advantage of dual processor
systems.
Will this be the same situation with dual core cpus?

And what is the difference between a dual core and a hyperthreading CPU?

Thanks

"Kenny S" kirjoitti viestissä
...
I read this article :


http://news.com.com/Intel+highlights...tag=html.alert

We know that all applications cannot take advantage of dual processor
systems.
Will this be the same situation with dual core cpus?

Yes


And what is the difference between a dual core and a hyperthreading CPU?


A dual core CPU is like having two separate processors, albeit in one
package.
Hyperthreading is running two tasks on one processor, either timesharing or
running one one while the other is idle.



Thanks



--
Tumppi
Reply to group
=================================================
Most learned on nntp://news.mircosoft.com
Helsinki, Finland (remove _NOSPAM)
(translations from FI/SE not always accurate)
=================================================

For those of us who have distributed computing projects, such as
Climateprediction.net, seti@home etc. it will be a great leap forward. Dual
core with HT would mean 4 X the work. In my case I think I'll wait awhile
as no doubt they will be rather expensive.

--
Peter
Toronto, Canada
XP Home SP2
P4 dual HT @ 3.0ghz, 1.0gb RAM, 160gb HD
"Leythos" wrote in message
...
On Fri, 06 May 2005 04:32:41 +0300, Kenny S wrote:

I read this article :

http://news.com.com/Intel+highlights...tag=html.alert

We know that all applications cannot take advantage of dual processor
systems.
Will this be the same situation with dual core cpus?

And what is the difference between a dual core and a hyperthreading CPU?

Many applications that don't make use of multiple threads or that are not
dual CPU aware benefit from a Dual CPU system as the OS can off-load tasks
between each CPU which gives the application a boost.

--

remove 999 in order to email me

Dual-Core is probably a necessity, rather than an Engineering
choice. The physics of just pushing the Clock speed higher &
higher was reaching some barriers. The latest Pentium chips are
little ovens, dissipating 130 Watts of heat. When you have a
single core with over 100,000,000 transistors - that's allot of
leakage current. ( Like a car idling, it' still consuming gasoline).

Developers have a lot of work ahead of them, re-coding for
64-Bit, Multithreaded tasking to take advantage of these new
CPUs. I remember the fist ASIC (Application Specific Integrated
Circuit) I worked with. No longer simple Flip-Flops or Nand
gates - just a single chip that prevented you from deciphering the
logic flow of the schematic.

Now we've got single chips with nearly 1,000 pins. Lot's of
changes on the horizon. Start saving up now for new hardware.

"Peter" wrote in message
...
For those of us who have distributed computing projects, such as
Climateprediction.net, seti@home etc. it will be a great leap forward.
Dual core with HT would mean 4 X the work. In my case I think I'll wait
awhile as no doubt they will be rather expensive.

--
Peter
Toronto, Canada
XP Home SP2
P4 dual HT @ 3.0ghz, 1.0gb RAM, 160gb HD
"Leythos" wrote in message
...
On Fri, 06 May 2005 04:32:41 +0300, Kenny S wrote:

I read this article :

http://news.com.com/Intel+highlights...tag=html.alert

We know that all applications cannot take advantage of dual processor
systems.
Will this be the same situation with dual core cpus?

And what is the difference between a dual core and a hyperthreading CPU?

Many applications that don't make use of multiple threads or that are not
dual CPU aware benefit from a Dual CPU system as the OS can off-load
tasks
between each CPU which gives the application a boost.

--

remove 999 in order to email me

Umm HT at best seems to be about 20% improvement IF the software can
take advantage of it. As far as "dual core" there is some overhead
"5-10%" perhaps lost AND the cores run at 75-80% of the faster single
core CPU's, so in summary I'd save my money until the duals were the
"default CPU" offering.

Peter wrote:

For those of us who have distributed computing projects, such as
Climateprediction.net, seti@home etc. it will be a great leap forward. Dual
core with HT would mean 4 X the work. In my case I think I'll wait awhile
as no doubt they will be rather expensive.