[kata-dev] QEMU 4 and QEMU-lite
julio.montes at intel.com
Tue May 28 19:21:38 UTC 2019
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 at redhat.com]
> > > Sent: Tuesday, May 28, 2019 7:40 PM
> > > To: Montes, Julio <julio.montes at intel.com>; pbonzini at redhat.com
> > > Cc: kata-dev at lists.katacontainers.io
> > > Subject: Re: [kata-dev] QEMU 4 and QEMU-lite
> > >
> > > * Montes, Julio (julio.montes at intel.com) wrote:
> > > > On Tue, 2019-05-28 at 18:19 +0100, Dr. David Alan Gilbert
> > > > wrote:
> > > > > * Montes, Julio (julio.montes at 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
\o/ interesting I will try, thanks.
> is version 4.21 or higher with CONFIG_PVH).
nop, I ran those test with 4.19.x
> > Graham
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