On Mon, Feb 22, 2021 at 05:29:47PM +0800, 鹏鲲 wrote:

I have read this article carefully before, but this article focuses on
the x86 system.

Most of the details in that article are not x86-specific.

I don't know if anyone has used rt-patch successfully on arm64 kvm? Or
have a lot of problems with arm64 kvm?

Maybe someone on the list can jump-in and provide their experience.

In general though, you will have to try things by yourself. Properly
configure both the host and guest kernels for preempt_rt, monitor
VMexits through "perf kvm" and try to minimize them, run cyclictest
inside and outside of the guest, and see how things goes...

And if this is an embedded device, you can also try Jailhouse.

Good luck,

--
Ahmed S. Darwish