Peter Zijlstra <peterz@xxxxxxxxxxxxx> 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
