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Intel gives peek inside Xeon Phi at Hot Chips

8/28/2012 10:00 PM EDT
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Stephen_M
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re: Intel gives peek inside Xeon Phi at Hot Chips
Stephen_M   9/4/2012 7:14:26 PM
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On the otherhand if this board came out as a PCIe based card that would run Open CL and have an aggressive price point, I might buy a few to do BOINC distributed computing work. The video cards I currently use has a large thermal dissipated power consumption but good output, unlike the microprocessors that host them. But their performance would have to be better than AMD's and Nvidia's current performance at a competitive cost/performance ratio. Remember that Larrabee is still a graphics based design. An OpenCL comparision would be truly useful independent of the host CPU. That will likely never happen.

Stephen_M
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re: Intel gives peek inside Xeon Phi at Hot Chips
Stephen_M   9/4/2012 7:05:41 PM
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Some of the numbers in the article are wrong based on the source listed: http://top500.org/list/2012/06/200 Rank 150 Intel United States Discovery - Intel Cluster, Xeon E5-2670 8C 2.600GHz, Infiniband FDR, Intel MIC / 2012 Intel Cores Rmax Rpeak Power 9800 118.60 180.99 100.8 Rank 177 Barcelona Supercomputing Center Spain Bullx B505, Xeon E5649 6C 2.53GHz, Infiniband QDR, NVIDIA 2090 / 2011 Bull Cores Rmax Rpeak Power 5544 103.20 182.88 81.5 The Power for the Barcelona is dead on... but their system shows 100.8Kw and not the 72.5Kw they quote. Unless they've made some changes since the test was performed in June. In which case the Barcelona system may be even lower. If you scale up the Barcelona system to 9800 processors, it's Rmax is in the 182 range at an unknown power consumption. I also don't know the relative performance difference of an E5-2670 versus a Xeon E5649. I think there are too many differences to make a fair comparison.

docdivakar
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re: Intel gives peek inside Xeon Phi at Hot Chips
docdivakar   8/29/2012 8:32:42 PM
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Any day I welcome a CPU that can show performance gains that can beat the CPU+GPU combo... BUT I fully resonate with what @jeffreyrdiamond is saying!! Don't pass the burden of learning new languages like CUDA / OpenCL to app developers, we have our own headaches to worry about. I too prefer a higher language, ideally the same one my app is developed with! MP Divakar

jeffreyrdiamond
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re: Intel gives peek inside Xeon Phi at Hot Chips
jeffreyrdiamond   8/29/2012 6:12:56 PM
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Xeon Phi is cool, but unsure of Intel's claims here. 1.4 GF/watt isn't impressive these days, and if programming is done with SSE and pThreads/OpenMP, it hardly seems any easier than CUDA or OpenCL. Does Intel have a higher level programming language in mind that still gets good performance?

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