From: Pierrick Bouvier <pierrick.bouvier@linaro.org>
To: "Bernhard Beschow" <shentey@gmail.com>,
qemu-devel@nongnu.org, "Alex Bennée" <alex.bennee@linaro.org>,
"Daniel P. Berrangé" <berrange@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Paolo Bonzini" <pbonzini@redhat.com>
Subject: Re: Controlling time in QEMU
Date: Tue, 10 Jun 2025 07:47:05 -0700 [thread overview]
Message-ID: <2e644619-d995-4410-894e-9e759ba06ed7@linaro.org> (raw)
In-Reply-To: <8CDF867E-5AB2-43B6-B271-B350E833316E@gmail.com>
Hi Bernard,
On 6/10/25 3:22 AM, Bernhard Beschow wrote:
>> As it seems a bit too good to be true, time for questions:
>> - Has it already been considered?
>> - Any obvious downside I might have skipped?
>
> The only downside I can see is that it seems to disturb QEMU's internal timekeeping. The GTK gui freezes for quite some time when the time facor is very low, e.g. 0.001.
>
> Best regards,
> Bernhard
>
Yes, faking all the calls to gettimeofday is not the best solution, as
it impacts qemu beyond its clock management.
This could be a good argument to have something implemented in QEMU,
which impacts only get_clock() and get_clock_realtime().
Thanks,
Pierrick
next prev parent reply other threads:[~2025-06-10 16:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-06 19:03 Controlling time in QEMU Pierrick Bouvier
2025-06-10 10:22 ` Bernhard Beschow
2025-06-10 14:47 ` Pierrick Bouvier [this message]
2025-06-10 21:30 ` Pierrick Bouvier
2025-07-03 20:36 ` Dr. David Alan Gilbert
2025-07-08 17:43 ` Pierrick Bouvier
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