Hi Kushal, 0x3 is a bitmask of ports. It is represented in binary as 0011. This means that ports 0 and port 1should be used by the DPDK application that you use. If you want to use other ports in your application, you should use a different portmask. For example, to use port 0 and port 3, you need a port mask of 1001 in binary, which is 0x9 in hex.
Regards, Rami Rosen בתאריך יום ו׳, 19 באוק׳ 2018, 00:17, מאת Kushal Gautam < [email protected]>: > Hi Rami: > > thank you for your inputs. > > Indeed, I had syntactic issues, and also, restarting the machine did the > trick. > > One thing that I was not clear is about "portmask". > > For instance, in the docs, we can find "./l2fwd -n 1 -c f -- -q 8 -p 0x3". > What exactly the value "0x3" refers to? > > Regards, > Kushal. > > On Thu, Oct 18, 2018 at 7:34 PM Rami Rosen <[email protected]> wrote: > >> Hi Kushal, >> The output of dpdk-devbind -- status that you posted shows that there are >> no ports that are bound to dpdk. This is the reason for the error you get. >> You should try >> insmod igb_uio.ko >> ( this kernel module is generated in the build process of DPDK) >> >> And >> dpdk-devbind.py -b igb_uio 0000:81:00.0 >> >> And likewise to the other port, 0000:81:00.1 >> And the launch the l2fwd app. >> >> >> You can also use vfio-pci or uio_pci_generic for binding the device to >> DPDK, look in the docs. >> >> Regards, >> Rami Rosen >> >> >> >> בתאריך יום ה׳, 18 באוק׳ 2018, 17:24, מאת Kushal Gautam < >> [email protected]>: >> >>> Hi: >>> >>> I am new to DPDK and my current use case with DPDK is minimal. Thus, I >>> think the l2fwd type of sample application should suffice. >>> >>> Below is a portion of the output of `dpdk-devbind.py --status` command >>> My DPDK version is 18.08, and I am using Ubuntu 16.04 (Linux Kernel >>> version >>> 4.15.12) >>> >>> Network devices using kernel driver >>> =================================== >>> 0000:01:00.0 'I350 Gigabit Network Connection 1521' if=eno1 drv=igb >>> unused=igb_uio *Active* >>> 0000:01:00.1 'I350 Gigabit Network Connection 1521' if=eno2 drv=igb >>> unused=igb_uio >>> 0000:81:00.0 'Ethernet Controller X710 for 10GbE SFP+ 1572' if=ens1f0 >>> drv=i40e unused=igb_uio *Active* >>> 0000:81:00.1 'Ethernet Controller X710 for 10GbE SFP+ 1572' if=ens1f1 >>> drv=i40e unused=igb_uio *Active* >>> >>> I am connecting to this machine via 0000:01:00.0 >>> >>> My requirement is to be able to send packets from 0000:81:00.0 to >>> 0000:81:00.1 and get some measurements like tx and rx times. >>> >>> I tried to run the sample app as (as shown in docs): >>> >>> ./l2fwd -n 1 -c f -- -q 8 -p 0x3 >>> >>> I have an error like this: >>> >>> EAL: Detected 16 lcore(s) >>> EAL: Detected 2 NUMA nodes >>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket >>> EAL: No free hugepages reported in hugepages-1048576kB >>> EAL: No free hugepages reported in hugepages-1048576kB >>> EAL: No free hugepages reported in hugepages-1048576kB >>> EAL: Probing VFIO support... >>> EAL: PCI device 0000:01:00.0 on NUMA socket 0 >>> EAL: probe driver: 8086:1521 net_e1000_igb >>> EAL: PCI device 0000:01:00.1 on NUMA socket 0 >>> EAL: probe driver: 8086:1521 net_e1000_igb >>> EAL: PCI device 0000:81:00.0 on NUMA socket 1 >>> EAL: probe driver: 8086:1572 net_i40e >>> EAL: PCI device 0000:81:00.1 on NUMA socket 1 >>> EAL: probe driver: 8086:1572 net_i40e >>> MAC updating enabled >>> EAL: Error - exiting with code: 1 >>> Cause: No Ethernet ports - bye >>> >>> I did not understand the usage of port mask in this context. >>> >>> Some inputs on this would be very helpful. >>> >>> Regards, >>> Kushal. >>> >>
