On Freitag, 25. September 2020 00:10:23 CEST Vivek Goyal wrote: > In my testing, with cache=none, virtiofs performed better than 9p in > all the fio jobs I was running. For the case of cache=auto for virtiofs > (with xattr enabled), 9p performed better in certain write workloads. I > have identified root cause of that problem and working on > HANDLE_KILLPRIV_V2 patches to improve WRITE performance of virtiofs > with cache=auto and xattr enabled.
Please note, when it comes to performance aspects, you should set a reasonable high value for 'msize' on 9p client side: https://wiki.qemu.org/Documentation/9psetup#msize I'm also working on performance optimizations for 9p BTW. There is plenty of headroom to put it mildly. For QEMU 5.2 I started by addressing readdir requests: https://wiki.qemu.org/ChangeLog/5.2#9pfs Best regards, Christian Schoenebeck
