SomeComputer Organizations andTheir Effectiveness

andphysical. ~~~~~~~must besharply limited Inmanyaspects; someofthe andphysical. mr infcn r sflos General parallel- ormultiple-stream organizations areexamined moresignificant areasfollows. astotype andeffectiveness-especially regarding intrinsic logical1)Thereisnotreatment ofI/Oproblems orI/Oasa difficulties. limiting resource. We assumethatallprograms ofinterTheoverlapped simplex processor (SISD) islimited bydataestwill either notbelimited byI/O,ortheI/Olimitadependencies. Branching hasaparticularly degenerative effect. * w The parallel processors [single-instruction stream-multiple- tionsawill ap eul to allc e memorycondatastream (SIMD)J areanalyzed. Inparticular, anesting typefigurations Thatis,theI/Odevice seesa"black box" explanation isoffered forMinsky's conjecture-the performance of computer withacertain performance. We shall beconaparallel processor increases aslogM instead ofM (the number of cerned withhowthecomputer attained aperformance data stream processors). potential, wThile itmaynever berealized duetoI/OconMultiprocessors (MIMD)aresubjected toasaturation syndromesiderations. based ongeneral communications lockout. Simplified queuing models We t t