Re: [bhyve][arm64] Number of allowed vcpus
Mihai Carabas <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm,gmane.os.freebsd.devel.virtualization |
|---|---|
| Message-ID | <CANg1yUtg3jVV8xPVHZBR5UUyzAgBBCSot=HsE=AQjB7hq_1FZA@mail.gmail.com> |
On Wed, Jan 13, 2021 at 4:55 PM Rodney W. Grimes < [email protected]> wrote: > > Hello, > > > > >From my perspective bhyve should use what is stated in the device tree > if > > no parameter is given and throw an error when N is greater than the > device > > tree value. > > > > Mihai > > That seems to be one reasonable solution. I am not very informed on what > the CPU over commit situation is on an ARM cpu with respect to > virtualization. > > I would also propose as an alternative to just do what was asked by the > user, which is the current amd64 implementation, OR do as asked and > emmit a warning message. > > I would ask given what was said above: isnt this the same situation as > if the sum of all VM VCPU's is more than the total cores in the system? > That is a very common situation, and one we must not restrict. > We are talking here about the device tree of the guest. If you boot up a guest with a device tree of X vcpus, why specify something else on the command line? > > > On Wed, Jan 13, 2021 at 1:55 PM Andrei Martin < > [email protected]> > > wrote: > > > > > Hello, > > > > > > While working on enabling multiple virtual cpus for the arm64 virtual > > > machine > > > I used the bhyve's "-c N" parameter to create N cpus (it gets only the > > > cpus, in contrast to the amd64). If N is smaller than the number of > cores > > > described in the device tree it will enable only N and if it's larger > it > > > will enable only the number of cores from the device tree. > > > > > > I don't know if it is the best approach. Another way would be to enable > > > all the cpus from the device tree, no more, no less. > > > > > > Do you have any suggestions? > > > > > > Andrei > > > > > _______________________________________________ > > [email protected] mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > > To unsubscribe, send any mail to " > [email protected]" > > > > -- > Rod Grimes > [email protected] > _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"