Re: [Qemu-devel] [Virtio-fs] [PATCH 0/4] virtiofsd: multithreading preparation part 3

[Stefan Hajnoczi]

On Mon, Aug 05, 2019 at 10:52:21AM +0800, piaojun wrote:
> # fio -direct=1 -time_based -iodepth=1 -rw=randwrite -ioengine=libaio -bs=1M 
> -size=1G -numjob=1 -runtime=30 -group_reporting -name=file 
> -filename=/mnt/9pshare/file

This benchmark configuration (--iodepth=1 --numjobs=1) cannot benefit
from virtiofsd multithreading.  Have you measured a regression when this
patch series is applied?

If your benchmark is unrelated to this patch series, let's discuss it in
a separate email thread.  fuse_buf_copy() can be optimized to use
pwritev().

Thanks,
Stefan