cs3330-chap1-power

cs3330-chap1-power - 1 CS/ECE 3330 CS/ECE 3330 Computer...

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Unformatted text preview: 1 CS/ECE 3330 CS/ECE 3330 Computer Architecture Chapter 1 Power / Parallelism Performance Analysis Its all relative Last Time Seconds cycles Clock ns Instructio Time CPU Make sure the units cancel out! What is a Hz? Amdahls Law Benchmarking cycle Clock n Instructio Program Time CPU = CS/ECE 3330 Fall 2009 1 2 Why Worry about Power Dissipation? Thermal issues: affect cooling, packaging, reliability, timing Battery life CS/ECE 3330 Fall 2009 2 Environment The Power Wall Power Trends CS/ECE 3330 Fall 2009 3 3 Power Dissipation Has Peaked CS/ECE 3330 Fall 2009 Must design with strict power envelopes 130W servers, 65W desktop, 10-30W laptops, 1W mobile 4 How Hot Does it Get? CS/ECE 3330 Fall 2009 5 4 Cooling Issues http://www.youtube.com/watch?v=nYhEpHEPqcc CS/ECE 3330 Fall 2009 6 Intel vs. Duracell Processor (MIPS) 16x 14x Hard Disk (capacity) Memory (capacity) 12x 10x 8x 6x 4x Improvement (compared to year 0) CS/ECE 3330 Fall 2009 7 No Moores Law in batteries: 2-3%/year growth Battery (energy stored) 0 1 2 3 4 5 6 2x 1x Time (years) 5...
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cs3330-chap1-power - 1 CS/ECE 3330 CS/ECE 3330 Computer...

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