I want to achieve proportional IO sharing by using cgroup.
My qemu config is: -drive file=$DISKFILe,if=none,format=qcow2,cache=none,aio=native -device virtio-blk-pci...
Test command inside vm is: dd if=/dev/vdc of=/dev/null iflag=direct
Cgroup blkio weight of the qemu process is properly configured as well.
But no matter how change the proportion, such as vm1=400 and vm2=100, I can only get the equal IO speed.
Wondering cgroup blkio.weight or blkio.weight_device has no effect on qemu?
PS. cache=writethrough aio=threads is also tested, the same results.