Re: AMD EPYC VM to VM performance investigation

2024-01-25 Thread David Morel
On Wed, Jan 10, 2024 at 11:21:06AM, David Morel wrote: > > I think it might be difficult to triage this if you are working on a > > Xen/Linux version that is so different from upstream > I ran some tests on a Xen 4.13.5 with a dom0 in 6.6.10, and on an XCP-ng on > the same machine, the

Re: AMD EPYC VM to VM performance investigation

2024-01-10 Thread David Morel
On Thu, Jan 04, 2024 at 16:39:46PM, Stefano Stabellini wrote: > On Thu, 4 Jan 2024, David Morel wrote: > > Hello, > > > > We have a customer and multiple users on our forum having performances that > > seems quite low related to the general performance of the machines on AMD > > EPYC > > Zen

Re: AMD EPYC VM to VM performance investigation

2024-01-05 Thread David Morel
On Thu, Jan 04, 2024 at 16:39:46PM, Stefano Stabellini wrote: > On Thu, 4 Jan 2024, David Morel wrote: > > Hello, > > > > We have a customer and multiple users on our forum having performances that > > seems quite low related to the general performance of the machines on AMD > > EPYC > > Zen

Re: AMD EPYC VM to VM performance investigation

2024-01-04 Thread Stefano Stabellini
On Thu, 4 Jan 2024, David Morel wrote: > Hello, > > We have a customer and multiple users on our forum having performances that > seems quite low related to the general performance of the machines on AMD EPYC > Zen hosts when doing VM to VM networking. By "VM to VM networking" I take you mean

AMD EPYC VM to VM performance investigation

2024-01-04 Thread David Morel
Hello, We have a customer and multiple users on our forum having performances that seems quite low related to the general performance of the machines on AMD EPYC Zen hosts when doing VM to VM networking. Below you'll find a write up about what we had a look at and what's in the TODO on our side,