Bug 2180347

Summary: [virtio-win][virtiofs] virtio-fs looks a bit bad in performance
Product: Red Hat Enterprise Linux 9 Reporter: xiagao
Component: virtio-winAssignee: Yvugenfi <yvugenfi>
virtio-win sub component: virtio-win-prewhql QA Contact: xiagao
Status: CLOSED MIGRATED Docs Contact:
Severity: medium    
Priority: medium CC: coli, jinzhao, juzhang, lijin, qizhu, yvugenfi
Version: 9.2Keywords: MigratedToJIRA
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Windows   
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Last Closed: 2023-08-16 13:37:29 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description xiagao 2023-03-21 09:07:01 UTC 
Description of problem:
Virtiofs performance in windows guest have 1/3 compared with RHEL guest

Version-Release number of selected component (if applicable):
virtiofsd-1.5.0-1.el9.x86_64
kernel-5.14.0-284.2.1.el9_2.x86_64
qemu-kvm-7.2.0-11.el9_2.x86_64

Steps to Reproduce:
1.start virtiofsd on host
/usr/libexec/virtiofsd --socket-path=/var/tmp/avocado_poxmt7pc/avocado-vt-vm1-viofs-virtiofsd.sock -o source=/root/avocado/data/avocado-vt/virtio_fs_test/ -o cache=auto
2.boot up win2022/RHEL9.2 guest with virtiofs device.
3.start the virtiofs service  and get the shared disk
4. do fio test on the shared disk.
Ws2022:
"C:\Program Files (x86)\fio\fio\fio.exe" --name=stress --filename=Z:/test_file --ioengine=windowsaio --rw=write/read --direct=1 --bs=4K --size=1G --iodepth=256 --numjobs=128 --runtime=1800 --thread

RHEL9:
/usr/bin/fio --name=stress --filename=/mnt/myfs/test_file --ioengine=libaio --rw=write/read --direct=1 --bs=4K --size=1G --iodepth=256 --numjobs=128 --runtime=1800

Actual results:
It indeed has a performance decreation compared with linux guest, it's about 1/3 compared with RHEL9.2 guest.

Expected results:
Basically there is no big degration compared

Additional info:
Comment 1 RHEL Program Management 2023-08-15 15:25:07 UTC 
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.