After some time, the swap token is passed to some other process that also undergoes swapping and requires memory more exigent than the current token holder.
Thanks to this extension, the algorithm does take minimum account of whether pages are used frequently or not, but does not deliver the performance expected of state-of-the-art memory management.
How can the kernel mark or sort pages as simply as possible in order to estimate access frequency without requiring an inordinate amount of time to organize data structures?
Hardly any part of the kernel entails as many technical difficulties as the virtual memory subsystem.
As I have demonstrated, not only are the technical details of paramount importance in achieving an efficient and powerful implementation of the swap system, but the design of the overall system must also support the best possible interaction between the various components to ensure that actions are performed smoothly and harmoniously.
This is combined with a ‘‘least recently used’’ method to realize page reclaim policy.
Thanks to this extension, the algorithm does take minimum account of whether pages are used frequently or not, but does not deliver the performance expected of state-of-the-art memory management.
How can the kernel mark or sort pages as simply as possible in order to estimate access frequency without requiring an inordinate amount of time to organize data structures?
Hardly any part of the kernel entails as many technical difficulties as the virtual memory subsystem.
As I have demonstrated, not only are the technical details of paramount importance in achieving an efficient and powerful implementation of the swap system, but the design of the overall system must also support the best possible interaction between the various components to ensure that actions are performed smoothly and harmoniously.
This is combined with a ‘‘least recently used’’ method to realize page reclaim policy.
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