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Sandy Bridge AVX benchmark gimmick?

post #1 of 11
Thread Starter 
Running IBT or LinX with the latest AVX instruction set gains you something like 30 gflops with a stock processor.

That to me is a big deal in terms of performance, but my question is will any software ever use this new AVX instruction set or is it just a benchmarking gimmick?
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post #2 of 11
Softwares should start using it soon. AVX was just released I believe, so give it some time and hope it doesn't end up like PhysX.
     
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post #3 of 11
Thread Starter 
Do people realize what a big deal it could be? I mean there is a huge performance boost acording to the benchmarks I trust. Just haven't seen much chatter about it.
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post #4 of 11
if IBT is any indicator of what kind of performance gains you can get, this might be a great extension to implement for good speed gains. hope it becomes main stream sooner than later.
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post #5 of 11
Imagine what they could do if they implemented AVX instructions to game engines and the like.
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post #6 of 11
AVX will be useful to financial analysis, multimedia content creation, HPC, etc. Maybe they can use AVX for physics calculations in games.

The limitation is going to be the programming though. We are going to need people to optimize their code for AVX.
Edited by Riou - 5/7/11 at 6:01pm
post #7 of 11
CPU based FP is pretty useless to many of us.

I myself have almost no use for it, however like Riou pointed out it does have its benefits, they just aren't part of gaming/daily usage afaik.
    
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post #8 of 11
Thread Starter 
Quote:
Originally Posted by BallaTheFeared View Post
CPU based FP is pretty useless to many of us.

I myself have almost no use for it, however like Riou pointed out it does have its benefits, they just aren't part of gaming/daily usage afaik.
what about audio or video encoding?
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post #9 of 11
Dunno if its true...

Quote:
Spatial video is just about always in integer form. There are, depending on colorspace, either 3 8-bit ints representing red, green and blue respectively (RGB 24bit), or 4 8-bit ints representing red, green, blue and alpha (transparency) (RGBA 32bit), or 1 8-bit int representing luminance(Y), and 2 subsampled 8-bit ints (which for each "true" pixel represent 4 bits) representing chrominance (color planes, U and V aka Cb and Cr) (YUY2 / 16bit YUV 4:2:2), or 1 8-bit int representing luminance, and 2 subsampled 8-bit ints (representing 2bpp each) representing chrominance (YV12 / 12bit YUV 4:2:0).

When you encode video however, the spatial information is often transformed into discrete frequencies in order to compress in a smart way that the human eye does not notice easily, and depending on the transformation, those can be floating point (DCT for instance, which is used in (M)JPEG, and MPEG variants). Have a read on fourier, DCT, and wavelet transformations. The H.264 standard comes with an integer transform .
I use a variation of 264 for CUDA, which would mean (I believe) that its the integer pipelines that would be at work.
    
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post #10 of 11
Quote:
Originally Posted by regal View Post
what about audio or video encoding?
It should help if the software is written to support AVX extensions. I am not aware of any software that uses AVX right now, but the performance potential is there.

AVX only supports FP calculations. Once Intel releases the next version of AVX that also supports integer calculations, it would be a big help.
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