Since we have another Ryzen thread that discusses compatibility and user experiences with Ryzen 1700/1800 series CPU, I thought it would be best to create a new thread exclusive to Threadripper.

 

Existing 1700/1800 Ryzen processors seem to be having GPU perfomance hits with NPT/KVM/Passthrough and whilst wildly recognised, there doesn't seem to be much progress with resolution.

Hopefully, Threadripper does not have this issue and this processor will be everyone's favourite UNRAID build. Please do post your Threadripper/UNRAID experiences, 3d benchmarks etc. here.

Really interested in this as well thinking of merging my gaming rig and NAS into one Threadripper box.

Hopefully @Limetech are getting one for testing that we can see how it performs.

since its too early for facts we are alone with our opinions.

imho threadripper facing the same npt issues since architecture wise I expect it to be very similar.

XEN hypervisor (dom0- domU cpu scheduling) seems to work ok with ryzen currently.

lets hope AMD brings a microcode patch that streamlines their messed up Nasty Page Tabling.  

epyc as a platform that targets server use cases should have that working from the very beginning.

any reports on this ?

(but the dear clock is too slow for hardcore gaming)

 

 

crossing fingers.

cheers

Edited August 5, 20178 yr by unrateable

Same internals, same issues. Just minor adjustments to the hardware ratios.

Npt was fixed last month. But it was mentioned you need the lated kernel in Linux. 

It was vanilla not dev. We might need to wait for an unraid update to the kernel.

Randall runs through the fix here, but I don't have a ryzen chip, thread ripper should be no different. 

 

 

Edited August 5, 20178 yr by Maticks

@Maticks I wish but doubt it. Followed your link and read into the tutorial.

 

In their write up they write "Make sure the kvm_amd and kvm_intel nested=1 lines are commented out to disable AVIC and nested page tables since they have performance/stability issues currently."

 

That does not sound like a fix.

No, NPT is NOT fixed... the video says "working, sort of"... its the same issue reported in the Ryzen thread.

according to this post - https://community.amd.com/message/2823396#comment-2823396

 

npt issue can be resolved by switching IOMMU to enabled and not 'auto' for threadripper. Can someone try this and confirm?