Berkeley CSUA MOTD:Entry 35785
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2017/11/22 [General] UID:1000 Activity:popular
11/22   

2005/1/19-20 [Computer/SW, Computer/HW/Memory] UID:35785 Activity:kinda low
1/19    What's the difference between an instruction cache and a target
        branch buffer?
        \_ This is the fucking csua, we talk about politics and girls,
           who do you think we are? bunch of nerds?
           \_ Doing your CS152 homework?  Oh wait, now it's semester break.
              Been out of school for too long.
        \_ I am guessing.  an intruction cache stores previous
           instructions, whereas a
           target branch buffer fetches the instruction which the
           branch prediciton logic anticipate.  (thus the target branch)
           \_ An instruction cache also stores next instructions if, say, the
              cache only reads from memory 16 bytes at a time and the
              instructions are less than 16 bytes each.
        \_ a branch target buffer is a place to store metadata about
           recently used branches, e.g. profiling statistics to inform
           branch prediction logic.  it's analogus to a TLB in that it
           holds the scratch state for hardware logic meant to accelerate
           the typical case execution beyond the worst case one.
2017/11/22 [General] UID:1000 Activity:popular
11/22   

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