Wow... really, you do realize that Bulldozer is 8-12 Cores, instead of Sandy Bridge which is 4 Cores with 2-4 Threads per core?
And AMD's dual and quad core processors for the past decade have just been refurbished and modified Athlons architecture the entire time ... Fail.
This thread is full of fail, just wait untill AMD Releases their new architecture within the upcoming next months, it won't dissapoint.
Hyperthreading:
In 1968, IBM had introduced a new concept that could enable Software Threads at the lowest level transparent to the application developers, this was known as SMT or Simultaneous Multithreading.
Sure, it was a great innovation but several years later was copied and re-branded as Hyper Threading (HT) by Intel in it’s x86 processors. Intel claims it to produce two parallel threads without loss in performance. Well, it’s not true.
AMD has recently talked about why it doesn’t opt for Hyper threading, rather lays multicores as it’s core business strategy.
Today, almost every production environment has mandated to stay away from it. Here are few examples:
■Novell calls Disabling HT a cool solution.
■Cognos, a leading BI software by IBM, recommends disabling HyperThreading for better performance, stablity.
■Microsoft recommends turning off HyperThreading when running PeopleSoft applications because “our lab testing has shown little or no improvement.”
■A Microsoft TechNet article recommends disabling Hyper-threading for production Exchange servers and “only enabled if absolutely necessary as a temporary measure to increase CPU capacity until additional hardware can be obtained.”
■Advanced Clustering found when running High Performance Linpack (HPL) that “Using HT on the other hand causes a ~10% drop in performance compared to HT not being used.”
Ofcourse HT can provide a cheaper and power efficient solution for desktop by giving 10-20% performance benefit but as desktop apps and Operating Systems are becoming more capable, intelligent, demanding and hence more Multithreaded, HT loses it’s purpose.
We need more cores. Sun SPARC has 8 cores, AMD and Intel too will have them soon. We need to continue this innovation more than looking at the cheaper alternatives that add little value.