On Wednesday 17 January 2007 18:04, you wrote:
On 1/17/07, Randall R Schulz <rschulz@sonic.net> wrote:
On Wednesday 17 January 2007 17:52, Edward Dunagin wrote:
...
hey fellows and gals, this confuses me to no end.<sigh>
here is my cat /proc/info
processor : 0 ... siblings : 2 ...
processor : 1 ... siblings : 2 ...
It sure looks like I have 2 processors.
Yes, it does. What's the problem?
What say you?
What's the question?
It's a Pentium 4 that i bought almost 2 years ago and before duo was mentioned. So HOW do I have a Pentium 4 with 2 cpu's?
It's a HyperThreading CPU. A half-hearted shot at a dual-core CPU. In a dual-core CPU there's a 100% complete pairing of all the circuitry that makes up a CPU (though they share the level 2 cache). In a HyperThreading CPU not all of the CPU hardware is present twice, hence there is less available parallelism. I don't know the details, but a plausible example would be that two concurrent integer multiplies could be occurring but two concurrent double-precision floating-point multiplies could not take place.
Peace...................ed
Peace. Hah! If humans wanted it, they could have it... Hmmm... I'm watching the season premier of "24"...
- Edward Dunagin-Dunigan-Dunnigan
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Randall R Schulz wrote:
In a HyperThreading CPU not all of the CPU hardware is present twice, hence there is less available parallelism.
There is actually zero real concurrency/parallelism - there is only one execution unit. Look up SMT (simultaneous multihreading) for a more detailed explanation. /Per Jessen, Zürich -- ENIDAN Technologies GmbH - managed email-security. Is _your_ business under attack? http://www.spamchek.com/ --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-factory+help@opensuse.org
2007/1/18, Per Jessen <per@computer.org>:
Randall R Schulz wrote:
In a HyperThreading CPU not all of the CPU hardware is present twice, hence there is less available parallelism.
There is actually zero real concurrency/parallelism - there is only one execution unit. Look up SMT (simultaneous multihreading) for a more detailed explanation.
Whay You know about AMD's antihyperthreading? (Technology makes multicore act as one core) http://www.pcadvisor.co.uk/news/index.cfm?newsid=6013 Regards --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-factory+help@opensuse.org
participants (3)
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Juan Erbes
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Per Jessen
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Randall R Schulz