Hi, All.
In my words, pages in memory is either resident or non-resident.
In linux internal, mapped or unmapped.
So number of non-resident pages is alway less than total number
of pages in memory.
Is your pages physics pages? or, it is Logical pages? However,
I think both is same here.
Waitting for your answer.
Thanks.
liyu
Song Jiang Wrote:
On Mon, 2005-09-19 at 23:02, liyu wrote:
Let's assume Mn is the total number of non-resident pages in follow
words.
Nod, 'M=Mh+Mc' and 'Mc+Mn' < 2M are always true.
Have this implied that Mn is alway less than M? I think so.
Yes.
but if "Once the number exceeds M the memory size in number of pages,
we terminted the test period of the cold page pointed to by HAND-test."
If Mn is alway less than M, when we move to HAND-test?
The algorithm tries to ensure that Mn <= M holds.
Once Mn == M+1 is detected, run HAND-test to bring it
back to Mn == M. That is, only during the transition period,
Mn <= M might not hold, and we make a correction quickly.
So there is no contradiction here.
Song
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