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
Systems and methods for detailed error reporting in data storage systems
Combination of a microorganism and a phytosphingosine derivative, composition, methods of use
Semiconductor device, method of manufacturing semiconductor device, and electronic apparatus
Dielectric insulation medium
Plants and seeds of hybrid corn variety CH089600
Electromagnetic sensor cable and electrical configuration therefor
Model matching for trace link generation
  Randomly Featured Patents
Specimen holder for microscope
Door lock actuator
Auger type ice making machine
Metal surfaces for sample analyzing and ionizing apparatus
Low-leakage and low-instability labyrinth seal
Test structure and method for performing burn-in testing of a semiconductor product wafer
Blocking intrusion attacks at an offending host
Failure-tolerant mass storage system
Arylpyrazoles as leukotriene inhibitors
Water meter cover