Re: ...\n

Vitaly Kuznetsov
2022-06-01T08:03:18Z

Peter Zijlstra <peterz@infradead.org> writes:

> On Tue, May 31, 2022 at 02:52:04PM +0000, Durrant, Paul wrote:

...

>>
>> I'll bite... What's ludicrous about wanting to run a guest at a lower
>> CPU freq to minimize observable change in whatever workload it is
>> running?
>
> *why* would you want to do that? Everybody wants their stuff done
> faster.
>

FWIW, I can see a valid use-case: imagine you're running some software
which calibrates itself in the beginning to run at some desired real
time speed but then the VM running it has to be migrated to a host with
faster (newer) CPUs. I don't have a real world examples out of top of my
head but I remember some old DOS era games were impossible to play on
newer CPUs because everything was happenning too fast. Maybe that's the
case :-)

--
Vitaly