Nvidia's green500 dominance continues as France's Kairos super takes efficiency title

There's a new efficiency champ at the top of the Green500 ranking of the world's most sustainable supercomputers. CALMIP's Kairos, located at the University of Toulouse in France, achieved an efficiency of 73.28 gigaFLOPS per watt in the High Performance Linpack (HPL) benchmark. Since 2007, the Green500 has served as …

[CapeCarl]

Pointless...

"There's no point in FP1"

[HuBo]

Interesting

With a machine's Rmax having quite an impact on GF/W (as noted in TFA), I'd submit that energy performance should be better than the following to qualify as remarkable (at present): Expected GF/W = 78.3 - 7.44 * log10(Rmax)

The two supercomputers that are clearly above that curve are Jupiter and El Capitan, but I'd expect upcoming Alice Recoque, Discovery, and other ExaFloppers to also be there (hopefully). If you have GNU Octave or MATLAB, you can check the situation with this script for Green500 systems beween 55 and 73 GF/W:

nvdrmx=[3.05 9.86 6.75 7.42 4.66 24.1 3.82 19.1 2.88 1000 3.12 123. 435. 5.04 13.2 98.5 3.14 10.2 6.42];

nvdeff=[73.3 70.9 69.4 68.8 68.2 68.0 67.2 66.9 65.4 63.3 63.0 62.0 61.0 61.0 60.3 59.3 58.2 57.0 55.6];

amdrmx=[2.99 24.5 31.7 31.1 24.4 19.2 208. 68.0 1809 15.9 9.89 46.1 27.2 478. 1353];

amdeff=[66.5 66.3 64.6 64.0 62.8 62.7 61.4 61.3 60.9 59.2 59.0 58.0 57.0 56.5 55.0];

semilogx(nvdrmx,nvdeff,'go',amdrmx,amdeff,'ro',logspace(0,3.3,21),78.3-7.44*log10(logspace(0,3.3,21)),'k:');xlabel('Rmax (PF/s)');ylabel('GF/W'); legend('Nvidia','AMD','expected')

[HuBo]

Re: Interesting

... and, when the good folks at AMD, HPE Cray, and DOE/NNSA/LLNL get El Capitan to Rmax at 2.1 EF/s (i.e. 74% of it Rpeak), while maintaining its 60.9 GF/W (improving networking and/or orchestration, running at 34 MW) then it will fall on the same pareto line as Jupiter:

Leading GF/W = 85.6 - 7.44 * log10(Rmax)

The Octave/MATLAB code to add that to the above is (with a red star for the up-tuned Capitan):

hold on; semilogx(2089,60.9,'r*',logspace(0,3.5,21),85.6-7.44*linspace(0,3.5,21),'b:'); hold off

(see also the deep dive and comments on this at TNP)