Hi,
I am trying to migrate to poll-mode-driver on an AMD system, and couldn’t get the link up until I use igb_uio module in legacy mode (intr_mode=legacy) as suggested by the release note 7.5 in dpdk (ref: IXA00378191 https://dpdk.readthedocs.io/en/v1.8.0/rel_notes/resolved_issues.html) But one thing is not clear to me, the nic capabilities list MSI-x support as well as in dmesg I see MSI-X support is enabled, then ideally, I should not see any issue in using vfio-pci module. Is it that the current axgbe user-space driver doesn’t support the embedded AMD ethernet devices in my system or dpdk pmd infrastructure is expecting something enabled/disabled on my system for it to make use of vfio-pci driver. Don’t want to pack too many issues in one thread, but with igb_uio driver links come up and forwarding works fine but eal_intr_thread consumes 100% CPU and number of interrupts for igb_uio driver are huge, so either axgbe driver is not clearing interrupt or nic is generating interrupts at crazy rate. Is some issue like this known with igb_uio running in intr_mode=legacy? I am suspecting it to be an issue with igb_uio because I gave a try it on Intel 82599 nics, there link doesn’t work with latest mainline kernel (5.0) but works with kernel 4.4. I am sure people would have used vfio-pci with AMD ethernet devices successfully (Advanced Micro Devices, Inc. [AMD] Device 1458). CPU: AMD Ryzen Embedded Running on kernel 4.19 Distro: centos Dpdk: 19.02 Thanks, Aveer
