释义 |
DictionarySeesetset at
set at1. To place or fix something at a particular position. A noun or pronoun is used between "set" and "at." Please set the screen at a lower angle, I'm having trouble seeing the movie. I set both clock hands at 12 so people would known that it is broken.2. To establish something at a fixed value, amount, or number. A noun or pronoun is used between "set" and "at." The government set the interest rate of government bonds at 3% for the next three years while the economy recovers. I originally set the oven at 300 degrees, but I think it needs to be hotter.3. To physically attack someone with great ferocity or hostility. Watch out for that bull in the back field—he'll set at you if you get too close. John set at the burglar with a knife to defend his family.4. To criticize, berate, or verbally harass someone at length or with great intensity. At the international summit, the foreign ambassador set at the president over the recent allegations of political espionage. The boss was really setting at Jen for the way she handled the accounts.See also: setset something at somethingto fix something at a particular value or amount. Please set the thermostat at a lower temperature. Who set the refrigerator at freezing?See also: setset atAlso, set upon. Attack or assail, as in The dog set at the postman, or The hyenas set upon the wounded lion. The first term dates from the early 1400s, the variant from the late 1300s. See also: setset atv. To attack or assail someone or something: The dogs set at the fox.See also: setset associative cache
set associative cache (architecture)A compromise between a direct mapped cacheand a fully associative cache where each address is mappedto a certain set of cache locations. The address space isdivided into blocks of 2^m bytes (the cache line size),discarding the bottom m address bits. An "n-way setassociative" cache with S sets has n cache locations in eachset. Block b is mapped to set "b mod S" and may be stored inany of the n locations in that set with its upper address bitsas a tag. To determine whether block b is in the cache, set"b mod S" is searched associatively for the tag.
A direct mapped cache could be described as "one-way setassociative", i.e. one location in each set whereas a fullyassociative cache is N-way associative (where N is the totalnumber of blocks in the cache). Performance studies haveshown that it is generally more effective to increase thenumber of entries rather than associativity and that 2- to16-way set associative caches perform almost as well as fullyassociative caches at little extra cost over direct mapping.LegalSeeSet |