Lecture 20 Top 500 EN 600.320/420/620 Instructor: Randal Burns 12 - - PowerPoint PPT Presentation

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Lecture 20 Top 500 EN 600.320/420/620 Instructor: Randal Burns 12 - - PowerPoint PPT Presentation

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Lecture 20 Top 500 EN 600.320/420/620 Instructor: Randal Burns 12 March 2019 Department of Computer Science, Johns Hopkins University Images in lecture from https://www.top500.org/static/medi a/uploads/top500_ppt_201806.pdf TOP500

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Department of Computer Science, Johns Hopkins University

Lecture 20 Top 500

EN 600.320/420/620 Instructor: Randal Burns 12 March 2019

Images in lecture from https://www.top500.org/static/medi a/uploads/top500_ppt_201806.pdf

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Lecture 20: TOP 500

TOP500

l

Fastest 500 computing machines

–

According to LINPACK benchmark

l

Controversial

–

Other metrics represent other problems

–

Green500: best computing power per watt

l Currently ”Summit” ORNL, US

–

122 TFLOP/s, 2.2M cores, 8.8 kW

–

IBM Power 8 + NVidia V100 GPUs

l

#2 Sunway TaihuLight Xiwu Chine

–

93 TFlops, 10,649,000 cores, 15,371 kW

–

All Chinese hardware

http://ornl.gov/info/ornlreview/v45_3_12/images/a04_p10_lrg.jpg

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Lecture 20: TOP 500

Top500 Growth (Exascale coming)

https://www.top500.org/static/media/uploads/top500_ppt_201806.pdf

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Lecture 20: TOP 500

Top500: Flops

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Lecture 20: TOP 500

Top500 and Moore’s Law

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Lecture 20: TOP 500

Top 500 Evolution

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Lecture 20: TOP 500

Who has supercomputers?

l Industry increasingly

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Lecture 20: TOP 500

The Rise of Accelerators

l Industry increasingly

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Lecture 20: TOP 500

Top 500 Conclusions

l Exaflop in reach l Accelerators are ubiquitous l Despite US reemergence, China dominates

– 40% of systems – Chinese made hardware

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Lecture 20: TOP 500

Green 500

l GFlops/watt

– Power efficiency will be the limited factor in reaching exascale

computing

– Also co-branded as environmentally friendly

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Lecture 20: TOP 500

What’s a Zettascaler??

l PEZY-SCx accelerator

– 3 level hierarchy of computer 128 cities x 4 villages x 4 cores

l L2 shared @ ”city” l L1 shared @ “village”

l ExaScaler flouro-carbon based liquid cooling l TCI stack die RAMs

All of this creates remarkable density

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Lecture 20: TOP 500

Green Trends Architectures

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Lecture 20: TOP 500

What else is going on?

l Convergence between TOP500 and Green 500

– Power and cooling density limits overall performance – Can’t make a fast machine that’s not efficient

l T#1 = G#5

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Lecture 20: TOP 500

Green Trends Efficiency

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Lecture 20: TOP 500

Exascale at 25 MW?

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Lecture 20: TOP 500

Final Comments

l Multiple Chinese manufacturers l Lenovo doing substantial business outside China

– 21 in US, 23 in rest of world

l Slow down in performance growth

– More focus at top machines – Longer lifetime on TOP500 (2x) – I’m not totally convinced that this is not (death of) Moore’s law

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