isc goingarm sms june 2017 - microsoft · •new computer architectures are just starting to...
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Isambard:The World’s First Large-Scale Production 64-Bit ARM Supercomputer
ProfSimonMcIntosh-SmithUniversityofBristol,UK
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 1
Recent trends in HPC:• Mostoftheworld’ssupercomputersarelargecollectionsofserversbasedoncommodityprocessors,typicallyIntel’sx86CPUs
• Newcomputerarchitecturesarejuststartingtoemerge,exploringdiversewaystoprovidethenextjumpinperformance
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 2
Why explore ARM-based supercomputers?• Thearchitecturedevelopmentisdrivenbythefast-growingmobilespace
• MultiplevendorsofARM-basedCPUs:• Greatercompetition• Morechoice• Excitinginnovations,e.g.invectorinstructionset
• Mont-Blancprovedtheapproachisfeasible
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 3
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 4
I.K.Brunel 1804-1859
'Isambard’, a new Tier 2 HPC service from GW4.Named in honour of Isambard Kingdom Brunel
Tier-2 HPC
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/
Tier 0: international
Tier 1: national
Tier 2: regional
Tier 3
The tiered model ofHPC provision
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EPSRC’s new Tier 2 HPC centres:• Fundedwitha£20mcapitalinvestment• 6newcentres created• Aimistoexplorearchitecturaldiversity:
• Processors:GPUs,XeonPhi,ARM• Interconnect:Infiniband,Omnipath,Cray• Storage:burstbuffers,fastnon-volatilememories
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 6
Archer: The UK's national HPC service (£43m)
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 7
2 research councils:
Hardware:• Cray XC30• 118,080 x86 cores• 4,920 nodes• Cray Aries interconnect
Science:• ~1,500 users• Materials science • CFD• Climate/ocean modelling
Top 10 codes by core hours used:VASP, CP2K, GROMACS, CASTEP, HiPSTAR, UM, ONETEP, LAMMPS, WRF, Oasis
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 8
I.K.Brunel 1804-1859
Isambard system specification:
• Cray system• 10,000+ ARMv8 cores• Cray software tools
• Compiler, math libs, tools…• Technology comparison:
• x86, Xeon Phi, Pascal GPUs• Phase 1 installed March 2017• The ARM part arrives early 2018
• Early access nodes from Sep
Isambard's mission:
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 9
I.K.Brunel 1804-1859
To provide an open service for UK*
science and industry to evaluate ARM in a production HPC environment.
The project employs several staff to help port and optimise codes to ARM
* and beyond!
Someresults:• MyteamhashadremoteaccesstoCaviumThunderX2earlysiliconfor~10days
• Havealreadymanagedtocompileandrunlotsofrealcodes“outofthebox”• Listonnextslide
• UsingGNUandClang/LLVM• Performanceverypromising!
• HappytosharethenumbersunderNDASimon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 10
• CloverLeaf (2D/3D)• TeaLeaf (2D/3D)• SNAP• BookLeaf• GROMACS• CP2K• TheUnifiedModel(UM)• STREAM
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 11
Alsogoingtobeworkingon:• Thetop10mostheavilyusedcodesonArcher:
• VASP,CP2K,GROMACS,CASTEP,HiPSTAR,UM,ONETEP,LAMMPS,WRF,Oasis
• Note8ofthese10codesiswritteninFORTRAN• AdditionalcodesrelevanttoIsambardprojectpartners:• OpenFOAM,OpenIFS,…
• Wanttocollaboratewhereverpossible!• Let’savoidduplicatingeffort
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 12
Exciting times ahead!
• Inthenearterm:greaterchoice,competition,innovation,…
• Inthelongerterm:potentialfordisruptivechangetosignificantlyimpactscientificsoftwaredevelopment
• Weneedtobereadytoexploitnextgenerationtechnologiestodelivernewscience!
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 13
For more information:
• http://gw4.ac.uk/isambard/
• https://www.epsrc.ac.uk/blog/isambardhpc/
• Twitter:@simonmcs
• Pleasegetintouchtocollaborateonoptimising applications:[email protected]
• BristolishiringfacultystaffinCStofocusonHPC
Simon McIntosh Smith, [email protected], @simonmcs http://gw4.ac.uk/isambard/ 14