On Wed, 7 Jul 2021 18:03:24 +0530 Ashish Mishra <ashi...@mvista.com> wrote:
> Hi Members , > > I am trying to learn DPDK on my laptop for which I installed > dpdk-stable-19.11.8 + > testpmd on x86_64 linux host > ( will move to latest DPDK once i have some idea ) > > When I tried testpmd , I had below gaps in my understanding / doubts . > If member's can please provide some pointer on below point : > > 1) NUMA socket -1 > I am trying to understand DPDK using testpmd. > When i execute testpmd , i am getting the below message . > Are these normal message or something is wrong in my setup > EAL: PCI device 0000:00:1f.6 on NUMA socket -1 > EAL: Invalid NUMA socket, default to 0 Ignore this, it means your system only has a single numa node, so then kernel reports all devices as attached to that node. > 2) What is the memory-channels parameter usage ,which is being passed to > testpmd. It is is an optimization to spread memory. If you want to figure out what is best for your machine, use dmidecode to look at memory banks, and count how many channels. > > 3) Do we have any logical loopback mode in DPDK? > So that we can try tx & rx logically without being dependent on hardware > ports There are various ring pseudo-device that might be useful for this. Or TAP on a dummy network device. > 4) How to know if the ethernet should be binded to IGB-UIO or VFIO module > As of now , i try both & continue with which doesn't throw errors. There are some flags but no script I know uses them. > I am reading the Documentation but felt short for these aspects > & hence thought to check with the community for any pointers / guidance. > > Apologies if these are vary basic in nature as i am just starting with DPDK > environment > > Thanks , > Ashish
