Can you do a simple time sh -c "dd if=/dev/zero of=testfile bs=8k count=11000"; rm testfile

"performance" test?

Also do the read test on a really big file, first from your host - so the file will get cached, then from within the qemu-vm where virtfs plan9 is mounted, dd if=bigfile of=/dev/null

Please, I want to confirm its not only my machines suffering from really totally shitty read/write performance thru virtfs?