On Thu, 22 Jun 2023 22:06:10 +0530 Nageswara Rao <nagpe...@gmail.com> wrote:
> Hi All, > > We are observing the following issue with DPDK22.11. We didn’t find any > upstream patches for this issue on the DPDK github. Is there any known > issue, please let us know. > > > > *Issue:* > > On Azure platform, we are unable to configure more than 4 queues. When we > try to configure more than 4 queues its failing with “EAL: Cannot send more > than 8 FDs” error. > > Here I am pasting the working and failing testpmd logs. > > Please note that this issue is not observed in DPDK 21.11. > You should be using the native netvsc PMD, not the vdev_netvsc,failsafe,tap kludge. I don't work on Azure any more but I suspect the issue is that the default in the kernel for TAP is for the number of queues == number of cores. You aren't going to see any real benefit from having more queues than the number of DPDK cores.
