From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrey Korolyov <andrey@xdel.ru>, Marcelo Tosatti <mtosatti@redhat.com>
Cc: "Marcin GibuÅ a" <m.gibula@beyond.pl>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [patch 0/3] kvmclock: Ensure time in migration never goes backward (v3)
Date: Sat, 06 Sep 2014 00:14:45 +0200 [thread overview]
Message-ID: <540A35D5.4050708@redhat.com> (raw)
In-Reply-To: <CABYiri_55dh-utHo0TyWvqmTF=4U9F0-x5Oe1neTB4pyWQ2ekg@mail.gmail.com>
Il 05/09/2014 21:35, Andrey Korolyov ha scritto:
> - boot up a VM, make sure to feed it heavy long task, for example
> kernel compilation,
> - neither migrate once in the middle of process (with fallback to
> non-live migration which is available in libvirt, else it may take
> forever) or just wait up to the end,
> - live migration time degrades from sub-10s value to larger values
> forever, not regarding if workload is still presented or not.
Are you sure you aren't simply doing migration with a low bandwidth
limit (the default is 32 MB/s), and moving over a gigabyte worth of page
cache data to the new machine?
Paolo
next prev parent reply other threads:[~2014-09-05 22:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-05 13:52 [Qemu-devel] [patch 0/3] kvmclock: Ensure time in migration never goes backward (v3) Marcelo Tosatti
2014-09-05 13:52 ` [Qemu-devel] [patch 1/3] kvmclock: Ensure time in migration never goes backward Marcelo Tosatti
2014-09-09 15:12 ` Marcelo Tosatti
2014-09-09 21:16 ` Alexander Graf
2014-09-09 23:07 ` Marcelo Tosatti
2014-09-05 13:52 ` [Qemu-devel] [patch 2/3] Introduce cpu_clean_all_dirty Marcelo Tosatti
2014-09-05 13:52 ` [Qemu-devel] [patch 3/3] kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation Marcelo Tosatti
2014-09-05 18:16 ` [Qemu-devel] [patch 0/3] kvmclock: Ensure time in migration never goes backward (v3) Andrey Korolyov
2014-09-05 18:26 ` Marcelo Tosatti
2014-09-05 18:29 ` Paolo Bonzini
2014-09-05 18:35 ` Andrey Korolyov
2014-09-05 19:35 ` Andrey Korolyov
2014-09-05 22:14 ` Paolo Bonzini [this message]
2014-09-05 23:05 ` Andrey Korolyov
2014-09-09 17:54 ` Andrey Korolyov
2014-09-16 9:14 ` Paolo Bonzini
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