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Thread: Broadcom Paper.

  1. #1

    Broadcom Paper.

    Dear Sir,

    Could you please explain aligned and non-aligned memory access.

    Thanks & Regards,


  2. #2
    VirtuQ™ Moderator
    Join Date
    Jul 2011
    Bangalore, India
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    Aligned access means that the addresses are a multiple of some basic number. Most commonly this number is either the word size (e.g. 32bits) or other higher number depending on the peripheral e.g. 256bits or 128bits. The purpose for alignment is that it is faster for hardware to do memory accesses which are a multiple of the chunk size or its bus-width. Some processor instructions specifically require that the memory address be a multiple of word size in order to complete the operation faster. You can see more on this Wikipedia article: http://en.wikipedia.org/wiki/Data_structure_alignment




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