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[AnandTech] The AMD FX (Bulldozer) Scheduling Hotfixes Tested

post #1 of 5
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Quote:
The basic building block of Bulldozer is the dual-core module, pictured below. AMD wanted better performance than simple SMT (ala Hyper Threading) would allow but without resorting to full duplication of resources we get in a traditional dual core CPU. The result is a duplication of integer execution resources and L1 caches, but a sharing of the front end and FPU. AMD still refers to this module as being dual-core, although it's a departure from the more traditional definition of the word. In the early days of multi-core x86 processors, dual-core designs were simply two single core processors stuck on the same package. Today we still see simple duplication of identical cores in a single processor, but moving forward it's likely that we'll see more heterogenous multi-core systems. AMD's Bulldozer architecture may be unusual, but it challenges the conventional definition of a core in a way that we're probably going to face one way or another in the not too distant future.

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post #2 of 5
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post #3 of 5
I very much appreciated the explanation regarding the hotfixes and what they were supposed to do. Sounds like AMD still has a lot of work to do with Microsoft if they're going to get anywhere with this new architecture.
 
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post #4 of 5
Quote:
Originally Posted by TheRockMonsi View Post

I very much appreciated the explanation regarding the hotfixes and what they were supposed to do. Sounds like AMD still has a lot of work to do with Microsoft if they're going to get anywhere with this new architecture.

Yep, lots of tweaking of when to share and when not to share modules. Definitely a work in progress. We probably won't see much of an improvement over the current hotfix with the current generation of Bulldozer though. This will most likely be of benefit to Piledriver though.
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post #5 of 5
A lot of the results makes the difference about the same as the diff between 2500K and 2600K. But in other instances no difference. Then again theres sometimes no difference in the 2500/2600K either...

Nothing to call home about... But any increase is an increase... and we need increases redface.gif
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