Author: Robert Hyatt
Date: 08:58:19 09/10/03
Go up one level in this thread
On September 09, 2003 at 18:22:34, Jeremiah Penery wrote: >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. :) Yes I do...
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