TLB
       Translation Lookaside Buffer (CPU)
       

Translation Look-aside Buffer
TLB

    (TLB) A table used in a virtual
   memory system, that lists the physical address page
   number associated with each virtual address page number.
   A TLB is used in conjunction with a cache whose tags are
   based on virtual addresses.  The virtual address is presented
   simultaneously to the TLB and to the cache so that cache
   access and the virtual-to-physical address translation can
   proceed in parallel (the translation is done "on the side").
   If the requested address is not cached then the physical
   address is used to locate the data in main memory.  The
   alternative would be to place the translation table between
   the cache and main memory so that it will only be activated
   once there was a cache miss.

   (1995-01-30)