a64 is a complete redesign...if anything might be similar it might be a functional unit here and there but even that i would think is rare....k8 is completely seperate from k7...working for AMD i can tell you that much at least.
their pipeline is too deep...they didnt actually create an smt processor in a native redesign but added stuff to the old p4 architecture. if you do true smt you put in TLS...TLS is thread level speculation where you can shoot off threads in the perdicted direction of the branch...that way if you...
you never want a deep pipeline...it affects misprediction. long pipelines suck because if you mispredict you loose too much information...which is why a redesign is generally required with smt. a lot of ASP and DSP processors are smt based with smaller pipelines. take for example the super IBM...
incorrect actually. if you look at the benchmarks...cmp and smt performance are exactly ontop of eachother until u hit 6 way and up. its easier to add more threads then it is to add more cores. also, the idea of unsed functional units still exists in the case of dual cores. in both cases they...
Ok, like everyone out there...i am quite disappointed in Intel's pathetic attempt to implement smt based processors. It was a hack job where they added to the native pipeline to implement simultaneous threading...however SMT cannot be designed like that because its a different architecture by...
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