On 04/17/2010 10:18 PM, Arjan van de Ven wrote:
On Sat, 17 Apr 2010 22:05:31 +0300
Avi Kivity<avi@xxxxxxxxxx> wrote:
On 04/17/2010 10:05 PM, Arjan van de Ven wrote:
On Sat, 17 Apr 2010 21:18:12 +0300
Correct. We're trying to reduce suckage from 2 cache misses per
access (3 for virt), to 1 cache miss per access. We're also
freeing up space in the cache for data.
Saying the application already sucks isn't helping anything.
but the guy who's writing the application will already optimize for
this case...
I lost you. What is he optimizing for? 4k pages?
not totally sucking on cache misses, eg trying to do data locality etc
Of course, but it's not always possible. Hence Java and Oracle (and
Linux itself) try to map their data with large pages.
Things like a garbage collector, an LRU, or large object trees that are
traversed by semi-random input are hard/impossible to localize.
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