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Hyperthreading technology?
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Registered User
Join Date: Apr 2002
Location: Florida
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Offline
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Just curious. Couldn't find an explanation on this link
http://www.sagernotebook.com/pages/n...&SubType=V
Yes, I know its a big hulky bulky ugly 12 lb brick compared to my elite 17" Powerbook, but I am a technology nerd and would appreciate any info. Or is HYPERTHREADING just hype? 
Gee, hope the next 17" revisions come with 128 MB ATI GPU's also...
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Senior User
Join Date: Mar 2001
Location: Santa Barbara, CA, USA
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Offline
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Hyperthreading on the P4 requires the App be written to support it. Generally it gives up to a 20% performance boost.
The idea is that if the developer threads his app using the P4 hyperthreading format the processor can process more than one instruction at a time. It is kind of like an advanced pipelining.
Long story short, it isn't hype but then again it isn't a silver bullet.
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Addicted to MacNN
Join Date: Dec 1999
Location: Pleasanton, CA
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Originally posted by Karim:
Hyperthreading on the P4 requires the App be written to support it. Generally it gives up to a 20% performance boost.
Neither of the above statements are true.
http://www6.tomshardware.com/cpu/20021227/index.html
HyperThreading makes a single processor look like two processors to Windows or any other multiprocessor-aware operating system. HyperThreading can actually be detrimental to performance of 3D games, but it does help when you're heavily multitasking.
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Senior User
Join Date: Mar 2001
Location: Santa Barbara, CA, USA
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Offline
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According to the article you post both of my "above" statements ARE true. Of course, the article states up to 25% boost and I said 20% which was quoted in material I read a few months ago.
The article also talks about HT aware applications...
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Mac Elite
Join Date: Nov 2001
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Offline
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Originally posted by Karim:
According to the article you post both of my "above" statements ARE true. Of course, the article states up to 25% boost and I said 20% which was quoted in material I read a few months ago.
The article also talks about HT aware applications...
Your statement about "needs to be coded to support it" and then the explit mention of P4 Hyperthreading is wrong.
The app needs to be written as multithreaded to get any speed up -- that much is true.
But there are no special "P4 Hyperthreading APIs" -- it's just standard thread code. Using standard windows threads. If an app was written as multithreaded, then P4 Hyperthreading can help. But there are NO coding changes necessary for a multi-threaded app -- that's the misinformation.
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Senior User
Join Date: Mar 2001
Location: Santa Barbara, CA, USA
Status:
Offline
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Your correct, my statement wasn't clear. I didn't mean to imply that HT used special API's.
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