Monitor for priority level of task in information processing sys

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179 15AL, 340147LP, H04J 308, G06F 918, G05B 1136

Patent

active

041457358

ABSTRACT:
The present invention is a monitor for the priority level of tasks in a computer in which priority levels are assigned to tasks in such a manner that a higher priority level is assigned with a shorter time. During the period when a task assigned with an optional priority level is processed, its processing time is measured and recorded by means of a level timer. In case a second task with a high priority level interrupts the first task and the processing is suspended, the measuring and recording of time are stopped, and the measured and recorded values are stored. When the processing of the second task is completed and the processing of the first task is started again, measuring and recording are started again from the stored values. When the processing time of the first task exceeds the processing time assigned to its priority level, the processing of the first task is suspended and a warning is issued.

REFERENCES:
patent: B496500 (1976-02-01), Jones et al.
patent: 3700820 (1972-10-01), Blasbalg et al.
E. J. Annunziata, et al., "Input/Output Module", IBM Technical Disclosure Bulletin, vol. 14, No. 1, Jun. 1971, pp. 264-268.

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