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

Takuya Yoshikawa
2010-04-23T11:14:54Z

(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