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[PC Per] An academic collaboration leads to a GPU/CPU collaboration...

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Over at North Carolina State University, students Yi Yang, Ping Xiang and Dr. Huiyang Zhou, along with Mike Mantor of Advanced Micro Devices have been working on a way to improve how efficiently the GPU and CPU work together. Our current generations of APU/GPGPUs, Llano and Sandy Bridge, have united the two processing units on a single substrate but as of yet they cannot efficiently pass operations back and forth. This project works to leverage the L3 cache of the CPU to give a high speed bridge between the two processors, allowing the CPU to pass highly parallel tasks to the GPU for more efficient processing and letting the CPU deal with the complex operations it was designed for.

Along with that bridge comes a change in the way the L2 prefetch is utilized; increasing memory access at that level frees up more for the L3 to pass data between CPU and GPU thanks to a specially designed preexecution unit triggered by the GPU and running on the CPU which will enable synchronized memory fetch instructions. The result has been impressive, in their tests they saw an average improvement of 21.4% in performance.

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NC State students are able to increase performance of AMD's Llano APU over 20% in some workloads. Makes you think, why didnt AMD do this in the first place. Hopefully, AMD gives them a call and asks them what their secret is...
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post #2 of 2
Sorry has been posted before : [/URL] http://www.overclock.net/t/1211966/ext-engineers-boost-amd-cpu-performance-by-20-without-overclocking/0_20
    
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Intel Core I7 3820 Gigabyte X79-UD7 GTX 970 Corsair vengence 
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Corsair vengence Samsung EVO 840 250GB Gigabyte 16X16 DVD-RW Custom water cooled loop. 
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Windows 7 64Bit SyncMaster 2343 + PHILIPS 32PW55 Logitech Revolution MX5500 Corsair 750TW 
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