Boots – shoes – and leggings
Patent
1990-10-04
1995-05-23
Eng, David Y.
Boots, shoes, and leggings
3649451, 3649642, 3642434, 3642673, G06F 1114
Patent
active
054189160
ABSTRACT:
A checkpoint retry system for recovery from an error condition in a multiprocessor type central processing unit which may have a store-in or a store-through cache system. At detection of a checkpoint instruction, the system initiates action to save the content of the program status word, the floating point registers, the access registers and the general purpose registers until the store operations are completed for the checkpointed sequence. For processors which have a store-in cache, modified cache data is saved in a store buffer until the checkpointed instructions are completed and then written to a cache which is accessible to other processors in the system. For processors which utilize store-through cache, the modified data for the checkpointed instructions is also stored in the store buffer prior to storage in the system memory.
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Hall Barbara A.
Huang Kevin C.
Jabusch John D.
Ngai Agnes Y.
Eng David Y.
International Business Machines
Jaeger Hugh D.
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