On Thu, Nov 26, 2009 at 02:08:23AM -0500, Michael Goldish wrote:
>
> ----- "Chen Cao" <kcao@xxxxxxxxxx> wrote:
>
> > Increase the sleeping time before the first check to 10 seconds,
> > and try every 2 seconds.
> >
> > But increasing these values cannot really solve the following
> > problem:
> > Guest is too heavy loaded, and have no time to response the
> > rebooting (method=shell) request, so session.is_responsive
> > returns
> > False, and we pass the first 'kvm_utils.wait_for';
> > a WHILE later the load becomes lighter, and sshd (or rss)
> > becomes
> > responsive, whether or not is guest rebooting, here we are trying
> > to establish a session to the guest at this point, unfortunately,
> > we succeed and pass the second 'wait_for', before rebooting kills
> > sshd (or rss).
> >
> > Signed-off-by: Cao, Chen <kcao@xxxxxxxxxx>
> > ---
> > client/tests/kvm/kvm_test_utils.py | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/client/tests/kvm/kvm_test_utils.py
> > b/client/tests/kvm/kvm_test_utils.py
> > index bf8aed2..e183dc6 100644
> > --- a/client/tests/kvm/kvm_test_utils.py
> > +++ b/client/tests/kvm/kvm_test_utils.py
> > @@ -91,7 +91,7 @@ def reboot(vm, session, method="shell",
> > sleep_before_reset=10, nic_index=0,
> > logging.error("Unknown reboot method: %s" % method)
> >
> > # Wait for the session to become unresponsive and close it
> > - if not kvm_utils.wait_for(lambda: not session.is_responsive(),
> > 120, 0, 1):
> > + if not kvm_utils.wait_for(lambda: not session.is_responsive(),
> > 120, 10, 2):
>
> By default, is_responsive() waits 5 secs before deciding the session
> is unresponsive. You can change that line to:
>
> if not kvm_utils.wait_for(lambda: not session.is_responsive(timeout=20),
>
> to give the session 20 secs to respond before it's deemed unresponsive.
> You can also make it 30. Will that be long enough?
>
I think this helps, thanks.
> BTW, I'm just curious -- what load is running on the guest?
e.g.
adding benchmarks of network/floating point/others as background
workload while doing live migrations.
use autoit to launch testing tools in Windows guests.
> Why would you want to reboot while the guest is loaded?
>
to check if blue-screen happens when rebooting after the tests in
(Windows) guest, for example.
> > raise error.TestFail("Guest refuses to go down")
> > session.close()
> >
> > --
> > 1.5.5.6
> >
> > --
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--
Cao, Chen
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