Avi Kivity wrote: >> >> 2. ltp diotest running time is 2.54 times than before >> https://sourceforge.net/tracker/?func=detail&aid=2723366&group_id=180599&atid=893831 >> > > Can you check the performance of this with cache=writeback? > > The common on the report referring to cache=writethrough is incorrect > (I think?) Hi, Avi I checked cache=writeback parameter, the diotest performance is much worse than "no this parameter"(about 20 times). Followed qemu help, my command is "qemu-system-x86_64 -m 512 -smp 4 -net nic,macaddr=00:16:3e:79:0c:db,model=rtl8139 -net tap,script=/etc/kvm/qemu-ifup -hda /share/ltp_guest.img -drive cache=writeback", is it right? When booting guest with cache=writeback, there are some hdb drive Error printed in guest, and guest booting very slow. Thanks, Xudong-- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
