From: Peter Maydell <peter.maydell@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: qemu-devel@nongnu.org, "Daniel P. Berrangé" <berrange@redhat.com>
Subject: Re: [RFC PATCH] tests/qtest: Don't parallelize migration-test
Date: Mon, 9 Sep 2024 16:34:56 +0100 [thread overview]
Message-ID: <CAFEAcA_+FGsrR8CY_chzyk6+RAsM91HYUnNK4oR+uEXwAbAV4A@mail.gmail.com> (raw)
In-Reply-To: <87cylcyhp3.fsf@draig.linaro.org>
On Mon, 9 Sept 2024 at 16:23, Alex Bennée <alex.bennee@linaro.org> wrote:
> I guess one question is are we getting value from all the extra
> migration tests? There certainly seem to be some sub-tests that are
> slower than the others and I assume testing a small delta on the tests
> before it.
>
> On s390x it seems the native test runs pretty much to the same time as
> the other TCG guests. Do we exercise any extra migration code by running
> tests for every architecture as opposed to one KVM/native hyp and one
> TCG one?
s390 is an interesting one because Christian pointed out that
although it has "KVM" support, we're actually running on a
VM under z/VM, and so when we run a CI test under "-accel KVM"
that's actually nested-KVM and its effects on the host CPU's
TLB could be such that it's actually worse than using TCG...
-- PMM
prev parent reply other threads:[~2024-09-09 15:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-09 13:39 [RFC PATCH] tests/qtest: Don't parallelize migration-test Peter Maydell
2024-09-09 15:23 ` Alex Bennée
2024-09-09 15:34 ` Peter Maydell [this message]
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