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An Analytic Model of the Hasp Execution Task Monitor.
- Source :
- Communications of the ACM; Dec1974, Vol. 17 Issue 12, p679-685, 7p, 1 Diagram, 5 Charts
- Publication Year :
- 1974
-
Abstract
- The HASP Execution Task Monitor periodically rearranges the OS/360 dispatching chain to give tasks preemptive execution priority in inverse order to that of their cpu utilization history. The effect is to keep the I/O bound tasks active and to prevent cpu bound tasks from locking out other tasks. This paper develops a simple model of the Execution Task Monitor and employs it to study the effectiveness of the monitor in improving system performance. A modified strategy for monitor control is investigated for the case of task execution in a memory heirarchy of varying speeds. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00010782
- Volume :
- 17
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Communications of the ACM
- Publication Type :
- Periodical
- Accession number :
- 5246456
- Full Text :
- https://doi.org/10.1145/361604.361616