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1、GEIntelligentPlatformsRDMA:TheFutureofHighSpeedFabricInterconnectsRDMA:TheFutureofHighSpeedFabricInterconnectsIntroductionKernelbypassimprovesprocessingefficienciesThemajorpushbehindtheInfiniBandstandardwastoremoveIn1999,aproposalfornext-generationI/Owasintroducedbybottlenecksinthe
2、networkstackaswellastackleotherissuesIntel?,Microsoft?andSunMicrosystems?(nowOracle?).Thewithexistinginterconnects,suchasslowcontextswitchingcollectivegoalwastodefineanoptimalserverandstoragebetweentheapplicationandkernel,highprocessoroverheadsarchitecture.Theresultingspecification
3、,knownasSystemI/O,andmemorycopies.wasreleasedinOctober2000.Today,thisisknownasInfiniBand.InfiniBandusesakernelbypasstechnologycalledRemoteDirectThiswhitepaperwillexplorethemeritsofthisarchitectureasMemoryAccess(RDMA),amethodbywhichacomputermaywellasmethodsofoptimizingitsuse.accessa
4、nareaofmemoryonaremotedeviceorCPUwithouttheinvolvementoftheoperatingsystem(OS).Usingthisprotocol,anapplicationdevelopercanachievehigh-throughputandlow-latencynetworking.ThetechnologywasdevelopedforuseintheHighPerformanceComputing(HPC)marketwheremassivelyparallelcomputingclustersare
5、usedtosolveverycomplexcomputationalproblems.RDMAoverEthernet(RoE)isalsopossible,andultimatelyachievesincreasedbandwidthefficiencyandloweroverhead.Thistechnologyisideallysuitedtoimage/sensorprocessingapplicationswheretheapplicationisreceivinglargeamountsofsensordata,suchasinRADAR/SO
6、NARarraysandhigh-reso-lutionvideocameras.Thisdatacanbeprocessedbyascalableclusterofhigh-performanceCPU/GPUs,allcapableofcommu-nicatingathighspeedsusingRDMA.Manyoftoday’smilitarylandvehiclesandunmannedaerialvehicle(UAV)platformshavedemandingsurveillance,targetacquisition/trackingand
7、storagerequirements.GEIntelligentPlatformshasdesigneditslatestgenerationofIntelSingleBoardComputers(SBC)tosupportRDMA;theseboardscandeliverincreasedperformancewhilereducingsystemsize,weight,andpower(SWaP).ReducingSWaPconstraintsisparamounttobuildingdeployableplatforms.Figure1DSP280
8、Intel?DualCore?i7Gen2withd
