Patent
1987-07-01
1991-11-05
Shaw, Gareth D.
G06F 1200
Patent
active
050634976
ABSTRACT:
In a data processing system employing virtual memory techniques and capable of performing a plurality of overlapping scalar and vector data processing operations, apparatus and method are provided to allow continuation of program execution after one or more vector load/store instructions, which refer to data values that are not currently in memory, receive page faults. At the occurrence of such a page fault, all instructions currently in execution are allowed to be completed, whereupon information summarizing the page fault condition is recorded in memory for use by the operating system software and a vector exception is generated. Operating system software responds to this exception, examines the fault information, causes the missing pages to be read into the main memory unit from the mass storage media, re-executes the exception producing vector instruction(s) and continues with the program execution.
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Bhandarkar Dileep
Cardoza Wayne
Cutler David N.
Orbits David A.
Witek Richard T.
Digital Equipment Corporation
Napiorkowski Maria
Shaw Gareth D.
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