Hello everyone, I am testing virtio-blk throughput (single thread, using hdparm -tT ). I want to know what is the guest/baremetal sequential read ratio with the current qemu / qemu-kvm builds. I have tried with qemu 1.0, 0.15, 0.14.1 , but my guest throughput is limited to 65 MB/s. Baremetal is at 112 MB/s .
Here is my VM configuration $QEMU -cpu core2duo,+vmx -drive file=$VM_PATH,if=virtio,aio=native -drive file=viotest.img,if=virtio,index=2 -net tap -net nic,macaddr=00:01:02:03:04:$VNC_OFFSET -kernel $KERNEL_IMAGE -append 'root=/dev/vda1 rw memmap=10M$100M kmemcheck=on' -m 1000 -vnc 0.0.0.0:$VNC_OFFSET Is there something wrong in the configuration ? I was hoping virtio-blk would give ~75% baremetal throughput atleast for large streaming reads. Thanks, Prateek