Resources Contact Us Home
Access authorization table for multi-processor caches

Image Number 2 for United States Patent #5230070.

A multi-processor (MP) system having shared storage is provided with locking of exclusivity status and read only status in multi-processor caches. The multi-processor system includes a plurality of processors, a shared main storage and a storage control element (SCE). The storage control element includes a global access authorization table (GAAT). Locking of exclusivity status in multi-processor caches is accomplished by providing at each processor a local access authorization table (AAT) containing access status for recently used data blocks wherein the size of a data block is a multiple of cache line size. The access status of a block in the local access authorization table is checked when the block is to be accessed by a processor. Only if the access status for a block is not found in the local access authorization table is authorization to access the block requested from the storage control element.

  Recently Added Patents
Integrated projector system
Apparatus and method for controlling semiconductor die warpage
Optoelectronic devices and a method for producing the same
Methods for measuring media performance associated with adjacent track interference
Re-establishing push notification channels via user identifiers
Method for treating rheumatoid arthritis by administering an anti-IL-6 antibody and methotrexate
Handling errors in a data processing system
  Randomly Featured Patents
Delay locked loop circuit having duty cycle correction function and delay locking method
CPU socket supporting socket-to-socket optical communications
Pigment package
Apparatus of dynamically assigning external home agent for mobile virtual private networks and method for the same
Powder product to protect moulds for the centrifugal casting of cast iron tubes and method of preparing this product
Disc protection casing and drive for receiving the same
Anode and base assembly for electrolytic cells
Inductor structure
Valve system for automatic fuel delivery