On Thu, May 25, 2023 at 03:03:54AM +0000, Liu, Yi L wrote: > vIOMMU may introduce some performance deduction if there > are frequent map/unmap. DPDK doesn't do that. And once you turn on the HW IOMMU you negate alot of the micro performance wins of bypassing. Maybe there is still some argument about giant/huge pages or something. > without vIOMMU is supposed to be more robust. But I'm not > sure if the noiommu userspace will adapt to cdev noiommu. > Perhaps yes if group may be deprecated in future. I think that is more a distro question, and we don't have to answer it fully now. Jason
