Re: [PATCH RFC v2 5/6] KVM: moving dirty bitmaps to user space

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(2010/04/23 19:28), Avi Kivity wrote:


OK, I will do in the next version. In this RFC, I would be happy if I can
know the overall design is right or not.


Everything looks reasonable to me.


Thank you!

Do you have performance numbers? I'm interested in both measurements of
KVM_SWITCH_DIRTY_LOG under various conditions and macro benchmarks (for
example, total guest throughput improvement under Kemari).


Currently, I'm just checking the performance visually.
  - on laptops, we can feel the speed directly: my favorite is installing
    ubuntu or debian by alternate installers

  - live migration with heavy work load

Now that I've got the overall design, I want to measure the performance by numbers.


About performance under Kemari: we(oss.ntt.co.jp staffs: me and Fernando) are
now concentrating on improving the basic live-migration infrastructures and
they(lab.ntt.co.jp staffs) are working hard for building Kemari itself.

  - We are also interested in using live-migration with HA software and this needs
    light, stable live-migration: same as Kemari!


So measuring Kemari's performance with our patch-set will need some more time,
** How about Tamura-san? **


So at this stage, I'll show you performance improvement(I hope to improve) by
another test cases.

If possible next week!

Thanks,
  Takuya

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