Author: Jeremiah Penery
Date: 15:22:34 09/09/03
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On September 08, 2003 at 19:58:42, Robert Hyatt wrote: >On September 08, 2003 at 19:06:32, Jeremiah Penery wrote: > >>The K6-2 (? -- One, or all, of the K6 series, anyway) had better branch >>prediction than any of those processors, including the P4. I'm sure Opteron's >>is not worse than P4's. >> >>I can give tons of references for the K6 data if you'd like. > > >To the best of my knowledge, assuming a program does this: > >T-NT-NT-T-T, and in that case most always goes T (taken) the next time, >the PIV will get it right. If that same program also frequently goes >NT-NT-T-NT-T and then almost always goes NT (not taken) then the >PIV will get that right too. Each time one of those "patterns" arises, >it will hit it dead on. > >I don't believe the K6 can do that. Do you have any idea at all how the K6 branch predictor worked? I think you should go look it up before talking about what it can't do. :)
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