Inclusion Property and Belady's Anomaly
At any time,
the set of pages with n frames
is a subset
of the set of pages for n+1 frames
Thrashing
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Effect of degree of multiprogramming
on CPU Utilization
-
What happens when the former is
raised to a very high value?
-
Process spends more time in page
faults than in execution
-
Situations in which thrashing can
occur
-
Minimum no. of frames that must
be allocated to a process
-
Rise in Page Fault Rate
-
Corrective actions
The Working Set Model
-
Study of Locality of Page references
-
Working window Size
-
The working set : an approximation
for locality
-
What happens if no.
of memory frames < total working set requirements?
-
Working set allocation and the thrashing
behavior