Hi

In order to reduce the noise, I re-ran the tests in a new no-GUI system. 

In the case of QEMU4+PVH the boot time is a little bit better but the memory

footprint is bigger than qemu4 and qemu-lite. Here the results

On Wed, 2019-05-29 at 11:07 +0200, Stefano Garzarella wrote:

On Tue, May 28, 2019 at 07:21:38PM +0000, Montes, Julio wrote:

On Tue, 2019-05-28 at 12:10 -0700, Maran Wilson wrote:

On 5/28/2019 11:54 AM, Whaley, Graham wrote:

-----Original Message-----

From: Dr. David Alan Gilbert [mailto:dgilbert@redhat.com]

Sent: Tuesday, May 28, 2019 7:40 PM

To: Montes, Julio <julio.montes@intel.com>; pbonzini@redhat.com

Cc: kata-dev@lists.katacontainers.io

Subject: Re: [kata-dev] QEMU 4 and QEMU-lite

* Montes, Julio (julio.montes@intel.com) wrote:

On Tue, 2019-05-28 at 18:19 +0100, Dr. David Alan Gilbert

wrote:

* Montes, Julio (julio.montes@intel.com) wrote:

Hi kata-folks

One of the topics in today's agent was QEMU 4 and the work

that we

are doing to support it in Kata Containers.

I ran the boot time and memory footprint metrics in my

workstation

to compare QEMU 4 vs QEMU-lite (2.11).

Here the results.

Feel free to comment and raise your concerns about QEMU 4.

So that looks pretty nice for QEMU 4; at least as fast and in

the noise on the memory usage?

yeah - IMO QEMU 4 has a good performance and new features, it's

a good

hypervisor for Kata Containers.

Great!  Please keep running these tests to make sure we don't

regress in

future versions (especially on our soft-freezes etc so we can

spot

them before the next release.

We do have a 'metrics CI' running on Kata, that in theory would

detect any major (roughly

+/- 5%) shifts - but, that would only happen when Kata updates the

version of Qemu it is tracking...

And, yes, we will almost definitely have to tweak that CI to

account for the new numbers when we land

The qemu4 PR ...

Just curious about whether you are providing the uncompressed kernel 

image in these Qemu 4 tests or not. Qemu 4.0 supports booting the 

uncompressed kernel binary in order to reduce boot time (if the

kernel 

\o/ interesting I will try, thanks.

As Maran, I'm also curious about a comparison with the new QEMU 4.0

feature to boot uncompressed kernel binary.

Here you can find some useful information (I hope :)):

https://gist.github.com/stefano-garzarella/7b7e17e75add20abd1c42fb496cc6504

Thanks,

Stefano

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