Apparatus and method for recovering from missing page faults in vector data processing operations
US5063497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1987 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Jul 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/8069
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.