topic Re: Diffrence between HT and Dual Core in Intel® Moderncode for Parallel Architectures

Diffrence between HT and Dual Core

girishr — Tue, 25 Sep 2007 07:16:34 GMT

Hi,

What is the deffrence between Hyperthread technology and Dual Core Technology.

regards

Girish

Re: Diffrence between HT and Dual Core

TimP — Tue, 25 Sep 2007 11:58:40 GMT

http://en.wikipedia.org/wiki/Hyper-threading
http://en.wikipedia.org/wiki/Multi-core_(computing)

Re: Diffrence between HT and Dual Core

jarnell — Wed, 26 Sep 2007 11:09:52 GMT

Is it correct that with Hyper-Threading the processor itself can decide to switch threads?

ie when one thread is "stalled" waiting for something, it can switch execution to another thread

On Multi-Core (Core 2 Duo/Quad) does the OS control thread/task switching?

Re: Diffrence between HT and Dual Core

TimP — Wed, 26 Sep 2007 15:26:37 GMT

In either case, it depends on a multi-processing OS. In fact, HT is more dependent on the OS to minimize the resources consumed by a spin-locked thread. For example, HT was the downfall of Windows 2000.