[vfio-users] cpu core pinning with multiple cpus

Tue Oct 6 01:30:49 UTC 2015

Great thanks for the patch, Alex! In my setup I did not experience a huge jump using the Hyper-V Enlightenments settings though.

Here’re my results using 4 configs:
1.) Custom compile QEMU with Hyper-V Enlightenments and MSI on the GPU enabled [1][2]
2.) Custom compile QEMU with Hyper-V Enlightenments
3.) Custom compile QEMU without Hyper-V Enlightenments
4.) Official repo QEMU without Hyper-V Enlightenments

http://www.3dmark.com/compare/fs/6150934/fs/6150711/fs/6150408/fs/6150255 

[1] http://vfio.blogspot.com/2014/09/vfio-interrupts-and-how-to-coax-windows.html
[2] https://virtualkvm.com/viewtopic.php?id=11

-- 
Okky Hendriansyah

On October 5, 2015 at 10:06:40, Eddie Yen (missile0407 at gmail.com) wrote:

Holy shit!
I tested patch minutes ago, tested 3DMark and Assassin's Creed: Unity, both are tested with Host and Guest reboot once.

The result is, both 3DMark score and ACU FPS got improved, also solved instability issues during games and performance test.
Here is my hardware:

CPU: Intel Core i7 4820K
RAM: DDR3-1600 4Gx8
MB: MSI X79A-GD45+
Storage: Seagate ST2000DM001
VGA(Host): AMD HD 5450
VGA(Guest): NVIDIA GeForce GTX980
Guest OS CPU: Using 6 threads from host

Before this patch, 3DMark score only got 104xx for maximum, and usually dropped to 99xx, worst is 90xx.
Now I can got about 105xx~106xx, and very stable.

Also, on ACU test, same places, same populations in the scene, before is 40FPS, the worst is 35FPS, and usually fought laggy.
Now it got about 43~44FPS at same scene, without any lag feeling.

Thanks AW's patch, now it can be my real game VM, you rock ;)

2015-10-03 8:08 GMT+08:00 Okky Hendriansyah <okky at nostratech.com>:
Hey, now that you just mentioned it, I remember I also have similar experience with fluctuated 3DMark scores. Even sometimes I got an invalid score, something about time source. But when I redo the benchmark, including the demo part usually does the trick, I got a valid score. Can't wait to try this patch myself. :)

Best regards,
Okky Hendriansyah

On Oct 3, 2015, at 06:49, Eddie Yen <missile0407 at gmail.com> wrote:

Looks like it's true, now we can use Hyper-V on NVIDIA drive.

I haven't test it yet, before this, my VM will get poor performance sometimes, and need to reboot again and again to get better performance
For example, when I try Assassin's Creed: Unity, same places, same scenes, I can get about 40FPS, but sometimes only 35FPS.
If I ran 3DMark with FireStrike scene, I can get 104xx, but sometimes only 98xx, and I got 90xx in once, very worse score. 
ACU is using heavily both CPU and GPU, and in many OLGs, especially produced by Korea, usually got heavily usage on CPU.

So if we got this, maybe can solved the virtual CPU problem and avoid NVIDIA suck driver operating mechanism.

2015-10-03 7:16 GMT+08:00 Okky Hendriansyah <okky at nostratech.com>:
Wait, does that means with this patch we can enable Hyper-V Enlightenments without NVIDIA knowing and disables the device?

Best regards,
Okky Hendriansyah

On Oct 3, 2015, at 04:49, Erik Adler <erik.adler at gmail.com> wrote:

 ʕ•ᴥ•ʔ_\,,/ 
All the best and again thx !

On Fri, Oct 2, 2015 at 11:34 PM, Alex Williamson <alex.l.williamson at gmail.com> wrote:
On Fri, Oct 2, 2015 at 3:24 PM, Erik Adler <erik.adler at gmail.com> wrote:
Hard to say since I am in a MMO. But it seems ... well almost normal.
Would guess over 90%. PvP would drop down to about 4fps, now it is
about 70ish (fps) with the patch. Bear metal that is the fps I have
about in PvP. Nice job!

(Bear metal) 

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