Re: AMD Ryzen KVM/NPT/IOMMU issue

2017-05-05 Thread Matthias Ehrenfeuchter
ve it too? This would be a nogo for the server platform and, in my eyes, the death even pre-released. Regards Am 03.05.2017 um 18:28 schrieb Nick Sarnie: On Wed, May 3, 2017 at 10:37 AM, Matthias Ehrenfeuchter wrote: Hi, There are a lot of messages/threads out there about bad performance w

AMD Ryzen KVM/NPT/IOMMU issue

2017-05-03 Thread Matthias Ehrenfeuchter
Hi, There are a lot of messages/threads out there about bad performance while using AMDs Ryzen with KVM GPU passthrough. It revolves all on enabling/disabling npt, while enabled overall VM performance is nice but the GPU performance gives me about 20% (and a lot of drops to zero GPU usage, wh