Created by Simpo PDF Creator Pro (unregistered version)               http://www.simpopdf.com     UFOs – Unidentified Flyi...
Lost in the Bermuda Triangle:  Complexity vs. Energy vs. Performance                                                  John...
Power/Performance (EPI) Evolution                            Power = EPI × IPC × Frequency                            50  ...
Research Challenges• 10x Reduction of Core EPI:    – Avoid O(n2) and O(n3) structures    – Leverage heterogeneous cores/ac...
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Shen

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Shen

  1. 1. Created by Simpo PDF Creator Pro (unregistered version) http://www.simpopdf.com UFOs – Unidentified Flying Objects Ufology – is a neologism coined to describe the collective efforts of those who study reports and associated evidence of unidentified flying objects (UFOs). Ufologist – A ufo investigator is called a ufologist Ufo Sightings- Some eye witnesses to the UFOs Roswell Incident- called the Roswell UFO crash 1947 UFO Conspiracy – Worldwide UFO cover Ups and related theories Alien- An extra-terrestrial being is called an alien
  2. 2. Lost in the Bermuda Triangle: Complexity vs. Energy vs. Performance John Paul Shen Intel Microarchitecture Research Lab June 18, 2006 WCED Panel Microprocessor Performance Evolution FrequencyPerformance = 2 PathLength × CPI John Paul Shen John Paul Shen - June 18, 2006 2 1
  3. 3. Power/Performance (EPI) Evolution Power = EPI × IPC × Frequency 50 Intel EPI (nj) 45 nj Microprocessors 65nm at 40 48 1.33v Pentium 4 I = 35 (Cedarmill) EP i486 10 Power = Performance1.75 Pentium 14 30 Power 25 Pentium Pro 24 Pentium 4 20 (Willamette) Pentium 4 (WMT) 38 15 Pentium M Core Duo Pentium 4 (CDM) 48 Dothan Yonah Pentium M (Banias) 13 10 Banias Pentium Pro nj Merom Pentium M (Dothan) 15 5 EPI = 10 i486 Pentium Core Duo (Yonah) 11 0 0 2 4 6 8 10 Core Duo (Merom) 10 Scalar Performance Power: single core power (relative to i486 baseline) Performance: SPECint performance (relative to i486 baseline) EPI: average energy spent per instruction (in nano-joules)3 John Paul Shen John Paul Shen - June 18, 2006 3EPI Optimization for CMP Architectures Power/Performance Scaling 300 EPI: CPU Cores Prog. Accelerators Fixed Function Units 10nj 1nj 0.1nj 0.01nj 250 Power = EPI × IPC × Frequency = EPI × IPS EPI = 5 nj 200 (linear power scaling) 20x Performance Increase Power (Watt) EPI = 1 nj 150W Power Envelope (power scales at n^1.1) 150 EPI = 1 nj (linear power scaling) 100 EPI = 0.5 nj EPI (linear power scaling) Throttling 50 NP/DSP/GPU EPI IXP2800 ~1 nj TMS320C6713 ~0.7 nj 0 GeF7800GTX ~0.6 nj 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 Performance (GIPS) Performance (GIPS) Intel Gen4 ~0.3 nj4 John Paul Shen John Paul Shen - June 18, 2006 4 2
  4. 4. Research Challenges• 10x Reduction of Core EPI: – Avoid O(n2) and O(n3) structures – Leverage heterogeneous cores/accelerators• Linear Power Scaling of Uncore: – Provide on-demand interconnects – Eliminate legacy interfaces• 2x Reduction of Design Cycle: – Adopt modular design style – Reuse building blocks5 John Paul Shen John Paul Shen - June 18, 2006 5 3

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