QEMU 7.2-rc1 Released - TCG For AVX/AVX2, Massive 9pfs Performance Improvement

[phoronix]

Phoronix: QEMU 7.2-rc1 Released - TCG For AVX/AVX2, Massive 9pfs Performance Improvement

QEMU 7.2 is gearing up for release in December as the next feature release to this widely-used processor emulator by the Linux virtualization stack. QEMU 7.2-rc1 is available for testing with a number of new features and improvements coming in this release...

https://www.phoronix.com/news/QEMU-7.2-rc1-Released

[tildearrow]

9pfs? That's cool, but only if it was available on Windows so I could see my ext4 and Btrfs drives on Windows (don't want to mess around with Ext2fsd/WinBtrfs)...

[linuxgeex]

9pfs? That's cool, but only if it was available on Windows so I could see my ext4 and Btrfs drives on Windows (don't want to mess around with Ext2fsd/WinBtrfs)...

This improved performance makes it more desirable, so there will be more impetus.

Windows host support for 9pfs export to guests V2 patch will be merged "soon".

There's a 32-bit Windows guest 9pfs driver here.

I've used sshfs for Windows guest to mount Linux host fs where high performance isn't important.

On WinXP I even used Samba. <Shudder/>.

[Quackdoc]

Id be interested to see how the new netdevs are used

[frytaped]

How does 9pfs compare to virtiofs ? It even seems to have a windows driver.

[dragorth]

Isn't WSL2 using 9p? Can't that be used?

[S.Pam]

How does 9pfs compare to virtiofs ? It even seems to have a windows driver.

I use virtiofs. It is much more performant than 9p. At least until now.

[intelfx]

I use virtiofs. It is much more performant than 9p. At least until now.

Could you share your virtiofs configuration for Windows guests (if I understood you correctly and that’s indeed your configuration)? In my experience, virtiofs on Windows was such a clusterfuck from both performance and stability POV that I just ended up using a tuned Samba.

[GreenReaper]

Not gonna lie, I was somewhat taken aback by what I initially read as a "massive 9fps improvement" with AVX. 😸

[S.Pam]

Could you share your virtiofs configuration for Windows guests (if I understood you correctly and that’s indeed your configuration)? In my experience, virtiofs on Windows was such a clusterfuck from both performance and stability POV that I just ended up using a tuned Samba.

Sorry, I mean I use it with Linux guests. I have not yet tested with Windows. Samba is what I use with Windows, which is OK. The issues with samba is that Linux does extra file caching, and with virtiofs you can disable this.