System controller, snoop tag modification method and information processing apparatus having snoop tag modification function
US7779209B2 · kind B2 · utility
1Cited by
7References
17Claims
0Family size
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Key dates
| Filing date | Apr 24, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Dec 14, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0831
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a multiprocessor system, a system controller includes snoop tags which are copy information on cache tags retained by respective CPUs. If the same address is registered in S (Shared state) in the cache tag of each of the CPUs connected to the same CPU bus, the address is registered in S (Shared state) in only any one of the snoop tags corresponding to the CPUs in which the same address is registered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.