5 ms·

I thought QEMU was supposed to be quite inferior in performance to KVM (though more flexible). Is that not the case? The link in the article just directed to th

• notaplumber 6y ago
  KVM is the kernel virtualization module on Linux, QEMU handles the userland side support, all device emulation. The kvm binary on Linux is equivalent to running qemu-system-* with -enable-kvm. Newer versions of QEMU also support the '-accel kvm' argument but also adds other acceleration backends, such as '-accel tcg' (slower), '-accel haxm' (Intel/Windows), and finally '-accel hvf' for Apple's Hypervisor.Framework. This work here is extending that existing support from only Intel VT-x to also cover ARM Silicon, factoring out common code and API differences made by Apple.
• sigjuice 6y ago
  By default, QEMU uses emulation which will be slow. Qemu can also use an "accelerator" such as KVM. See https://www.qemu.org/docs/master/system/invocation.html#hxtool-0 https://www.qemu.org/docs/master/system/invocation.html#hxto... e.g. I can do this on my Raspberry Pi 4 running 64-bit Raspberry Pi OS. qemu-system-aarch64 \ -M virt,accel=kvm -cpu host -m 2G -smp 2 -nographic \ -bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd \ -cdrom alpine-virt-3.12.0-aarch64.iso