Re: [PATCH] Caches that shrink automatically

Hans Reiser (reiser@namesys.com)
Sun, 04 Aug 2002 22:31:07 +0400


Rik van Riel wrote:

>On Sun, 4 Aug 2002, Andreas Gruenbacher wrote:
>
>
>>On Sunday 04 August 2002 13:30, Hans Reiser wrote:
>>
>>
>>>How do you ensure that caches have their (internal) aging hands pushed
>>>at a speed that is proportional to their memory usage, or is your design
>>>susceptible to all the usual complaints the unified memory manager crowd
>>>has about separate caches?
>>>
>>>
>>That's a policy/optimization issue; it's not even desirable to shrink the
>>caches with priorities proportional to their size---they would all tend to
>>become equally large.
>>
>>
>
>Nope, the idea is to push all caches according to size, but
>often-used caches should shrink less than caches that are
>hardly ever used.
>
Do you let the subcache decide how to move the aging hand and track it?
Have I convinced you of that one yet? Or is it still page based?

-- 
Hans

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