AMD's AM2 chips already have reverse Hyperthreading built-in?

[Yousuf Khan]

According to this story, AMD has already built in the reverse
Hyperthreading technology into its new generation (Rev. F) processors,
and that all it requires is a BIOS update, and a new Windows CPU driver.
The CPU driver detects whether a program that is running is primarily
single-threaded or multi-threaded, and enables the feature if it's
primarily single-threaded. During the time it's in single-thread mode,
it's got access to the combined decoders of both processors, six of them
altogether. There was some talk that the Rev F cores are about 20%
larger than the Rev E's -- this couldn't have all been because of the
addition of Pacifica virtualization technology.

What I find interesting is that there is now an emphasis on the CPU
driver, which for years was about as generic as a USB driver and
similarly supplied generically by Microsoft. Now it looks like CPU
drivers are becoming a hotbed of performance development by the
manufacturers, like with graphics drivers.

AMD Socket AM2 has a secret weapon
"AMDs Reverse-HT is a dynamic technology, and with Microsoft's Windows
update and a new processor driver, the driver will copy the graphics
drivers of today's 3D accelerators. The driver will detect the app, see
if it is multithreaded or not and turn the ReverseHT on, or leave it off."
http://www.theinquirer.net/?article=32589

 

[Evgenij Barsukov]

According to this story, AMD has already built in the reverse
Hyperthreading technology into its new generation (Rev. F) processors,
and that all it requires is a BIOS update, and a new Windows CPU driver.
The CPU driver detects whether a program that is running is primarily
single-threaded or multi-threaded, and enables the feature if it's
primarily single-threaded. During the time it's in single-thread mode,
it's got access to the combined decoders of both processors, six of them
altogether. There was some talk that the Rev F cores are about 20%
larger than the Rev E's -- this couldn't have all been because of the
addition of Pacifica virtualization technology.

What I find interesting is that there is now an emphasis on the CPU
driver, which for years was about as generic as a USB driver and
similarly supplied generically by Microsoft. Now it looks like CPU
drivers are becoming a hotbed of performance development by the
manufacturers, like with graphics drivers.

AMD Socket AM2 has a secret weapon
"AMDs Reverse-HT is a dynamic technology, and with Microsoft's Windows
update and a new processor driver, the driver will copy the graphics
drivers of today's 3D accelerators. The driver will detect the app, see
if it is multithreaded or not and turn the ReverseHT on, or leave it off."
http://www.theinquirer.net/?article=32589

Funny that the only justification or sources for this theory are
given as "It seems...".
I wonder if there is any other indications of that except
hallucinations of the author?

Regard,
Evgenij

 

[Yousuf Khan]

Funny that the only justifi

cation or sources for this theory are

given as "It seems...".
I wonder if the Yre is any other indications of that except
hallucinations of the author?

Hard to say, it's just a rumour afterall. You're supposed to ingest it
with Sodium Chloride.

Here's another site that seems to think the rumours might be true:

The AM2 Opteron's are coming! The AM2 Opteron's are coming! - Neoseeker
News Article
http://www.neoseeker.com/news/story/5887/

And this site seems to think it might not be so true:

TechSearch Blog | Reverse Hyperthreading: AMD vs. Intel
http://techsearch.cmp.com/blog/arch...hyperth.html?loc=software_and_web_development

Yousuf Khan