Process execution time accounting system
US4432051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1980 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Oct 30, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/52
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A time accounting system for accounting for the time a process spends in a ready state, a wait state, or a running state. The system includes a time-of-day clock coupled to a central processing unit for outputting the time-of-day whenever a process changes state. A memory also coupled to the central processing unit stores the contents of a plurality of addressable process control blocks and each process control block includes first, second, and third storage locations for storing indications of the amount of time an associated process has been in the running, ready, and wait states, respectively. The central processor unit accesses the process control blocks and updates the process times stored therein in accordance with control signals generated by decoding a string of microinstructions stored in a control store memory. The time-of-day clock is accessed each time a process enters one of the running, ready, or wait states and each time the execution of a process is completed. The process control blocks are accessed and updated with the differences in the access times of the time-of-day clock to accumulate in the appropriate storage locations in each process control block the amount…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.