December 2006
Beginner
320 pages
11h 17m
English
Content preview from Inside the MachineBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Branch Prediction on the G4e and Pentium 4
The G4e and the Pentium 4 each use both static and dynamic branch prediction techniques to prevent mispredictions and branch delays. If a branch instruction does not have an entry in the BHT, both processors will use static prediction to decide which path to take. If the instruction does have a BHT entry, dynamic prediction is used. The Pentium 4’s BHT is quite large; at 4,000 entries, it has enough space to store information on most of the branches in an average program.
The earlier PIII’s branch predictor had a success rate of around 91 percent, and the Pentium 4 allegedly uses an even more advanced algorithm to predict branches, so it should perform even better. The Pentium 4 also uses a BTB to store ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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