Messages in this thread | | | Date | Fri, 15 Jun 2001 15:50:33 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: Buffer management - interesting idea |
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On Fri, 15 Jun 2001, Ivan Schreter wrote:
> In 2Q, when a page is present in LRU queue, you move it to the front of > LRU queue as usual. Otherwise, if it is in memory, it must be in A1 queue > (the FIFO one), so you DON'T do anything. When the page is NOT in memory, > you load it conditionally to Am LRU queue (if it is present in A1out > queue) or to A1 queue (FIFO), if not. > > It gets interesting when you need to swap out a page from memory. When the > size of A1 FIFO is greater than limit (e.g., 10% of buffer space), a page > from A1 is swapped out (and put into A1out list), otherwise a page from Am > LRU is swapped out (and NOT put into A1out, since it hasn't been accessed > for long time).
This description has me horribly confused. Do you have any pointers to state diagrams of this thing? ;)
regards,
Rik -- Executive summary of a recent Microsoft press release: "we are concerned about the GNU General Public License (GPL)"
http://www.surriel.com/ http://www.conectiva.com/ http://distro.conectiva.com/
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