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Math Help - Cache Problem - Bit Addressing/Miss Rate

  1. #1
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    Cache Problem - Bit Addressing/Miss Rate

    Hi... I don't know if this is appropriate whatsoever or if anyone here will have the knowledge necessary to help me, but I have this cache problem and I honestly have no clue what it is asking me.
    Here's the question:

    "Consider a video streaming workload that accesses a 16MB working set sequentially with the following byte-address stream:
    0, 8, 16, 24, 32

    a) Assume a 256 KB direct-mapped cache with a 64-byte line. What is the miss rate for the address stream above?"

    I have no idea what this is asking. Any insight will be greatly greatly greatly appreciated!
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  2. #2
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    Re: Cache Problem - Bit Addressing/Miss Rate

    Hey RobertXIV.

    What is the hit and miss rate of the cache? Basically you need to figure out the miss rate for some chunk of data or packet and then look at the correct multiple for your given file (16MB).

    Basically a cache has hits and misses. If everything goes well its a hit and if the cache misses data its a miss. If its a miss then the data needs to be fetched again. The cache is a very high speed form of memory which is much faster than normal RAM.

    You have to find out how much missed data is involved for your 16MB file given your bit stream and your cache size (256KB). Have you been given formulae or assumptions for the hit and/or miss rate of each data packet?
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  3. #3
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    Re: Cache Problem - Bit Addressing/Miss Rate

    Nope I posted all the information we were given

    I think I figured it out though! Thanks for the help!
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