Non-data inclusive coherent (NIC) directory for cache

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United States of America Patent

PATENT NO 9292445
APP PUB NO 20150058569A1
SERIAL NO

14501437

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Abstract

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Embodiments relate to a non-data inclusive coherent (NIC) directory for a symmetric multiprocessor (SMP) of a computer. An aspect includes determining a first eviction entry of a highest-level cache in a multilevel caching structure of the first processor node of the SMP. Another aspect includes determining that the NIC directory is not full. Another aspect includes determining that the first eviction entry of the highest-level cache is owned by a lower-level cache in the multilevel caching structure. Another aspect includes, based on the NIC directory not being full and based on the first eviction entry of the highest-level cache being owned by the lower-level cache, installing an address of the first eviction entry of the highest-level cache in a first new entry in the NIC directory. Another aspect includes invalidating the first eviction entry in the highest-level cache.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bronson, Timothy C Round Rock, US 38 244
Drapala, Garrett M Poughkeepsie, US 32 134
Gott, Rebecca M Poughkeepsie, US 11 29
Mak, Pak-kin Poughkeepsie, US 89 1213
Srinivasan, Vijayalakshmi New York, US 102 1216
Walters, Craig R Highland, US 51 357

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