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1 definition found
 for sector mapping
From The Free On-line Dictionary of Computing (30 December 2018) :

  sector mapping
  
     In this scheme the memory and cache are divided into blocks
     of 2^m bytes (the cache line size).  A sector consists of
     2^n consecutive blocks.
  
     When a block is cached, it is read into the correct position
     in any sector of the cache, given by discarding the bottom m
     address bits and taking the next n as the block number within
     the sector.
  
     That whole sector is then tagged with the remaining upper
     address bits and the other blocks in the sector are marked as
     invalid.  This scheme takes advantage of locality of reference
     to consecutive blocks and needs fewer tags thus reducing the
     cost of associative access to the tags.
  

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