Re: [dpdk-dev] lost when learning how to test dpdk

[Ravi Kerur <rkerur@gmail.com>]

On Thu, Jul 30, 2015 at 5:03 AM, Jan Viktorin <viktorin@rehivetech.com>
wrote:

> Hi,
>
> thanks for reply. I could see those docs but it does not help me a lot.
> I still do not understand very well the principle of the tool. How it
> chooses the NICs to use? Previously I confused -b in dpdk_nic_bind and
> testpmd. They have somehow opposite meaning. I can start testpmd now,
> however, it does ot probe any NIC. I've tried -w to whitelist certain
> NICs but with no success.
>
> $ dpdk_nic_bind --status
>
> Network devices using DPDK-compatible driver
> ============================================
> 0000:03:00.0 '82545GM Gigabit Ethernet Controller' drv=uio_pci_generic
> unused=e1000
> 0000:03:02.0 '82545GM Gigabit Ethernet Controller' drv=uio_pci_generic
> unused=e1000
>

NICs may not be supported by PMD drivers yet. Do "lspci -nn" and check the
device-id.  Adding support in PMD should not be a problem, but I am not
sure on support since there is End of Life listed on Intel Website

http://ark.intel.com/products/4964/Intel-82545GM-Gigabit-Ethernet-Controller


> Network devices using kernel driver
> ===================================
> 0000:00:19.0 'Ethernet Connection I217-V' if=eno1 drv=e1000e
> unused=uio_pci_generic *Active*
>

DPDK doesn't bind Active NIC, support for I217-V in PMD is being tested
currently.


>
> Other network devices
> =====================
> <none>
>
> $ sudo testpmd -c 0x3 -n 2 -- -i --total-num-mbufs=2048
> EAL: Detected lcore 0 as core 0 on socket 0
> EAL: Detected lcore 1 as core 1 on socket 0
> EAL: Detected lcore 2 as core 0 on socket 0
> EAL: Detected lcore 3 as core 1 on socket 0
> EAL: Support maximum 128 logical core(s) by configuration.
> EAL: Detected 4 lcore(s)
> EAL: VFIO modules not all loaded, skip VFIO support...
> EAL: Setting up physically contiguous memory...
> EAL: Ask a virtual area of 0x3c00000 bytes
> EAL: Virtual area found at 0x7fe973e00000 (size = 0x3c00000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe973a00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe973600000 (size = 0x200000)
> EAL: Ask a virtual area of 0x3c00000 bytes
> EAL: Virtual area found at 0x7fe96f800000 (size = 0x3c00000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe96f400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe96f000000 (size = 0x200000)
> EAL: Requesting 64 pages of size 2MB from socket 0
> EAL: TSC frequency is ~3699998 KHz
> EAL: Master lcore 0 is ready (tid=7989d8c0;cpuset=[0])
> EAL: lcore 1 is ready (tid=6efff700;cpuset=[1])
> EAL: No probed ethernet devices
> Interactive-mode selected
> Done
> testpmd>
>
> Thanks
> Jan Viktorin
>
> On Wed, 29 Jul 2015 12:09:06 +0300
> ciprian.barbu <ciprian.barbu@enea.com> wrote:
>
> >
> >
> > On 28.07.2015 21:13, Jan Viktorin wrote:
> > > Hello all,
> > >
> > > I am learning how to measure throughput with dpdk. I have 4 cores
> > > Intel(R) Core(TM) i3-4360 CPU @ 3.70GHz and two 82545GM NICs connected
> > > together. I do not understand very well, how to setup testpmd.
> >
> > http://dpdk.org/doc
> > http://dpdk.org/doc/guides/testpmd_app_ug/run_app.html
> > http://dpdk.org/doc/quick-start
> >
> > >
> > > I've successfully bound the NICs to dpdk:
> > >
> > > $ dpdk_nic_bind --status
> > >
> > > Network devices using DPDK-compatible driver
> > > ============================================
> > > 0000:03:00.0 '82545GM Gigabit Ethernet Controller' drv=uio_pci_generic
> unused=e1000
> > > 0000:03:02.0 '82545GM Gigabit Ethernet Controller' drv=uio_pci_generic
> unused=e1000
> > >
> > > Network devices using kernel driver
> > > ===================================
> > > 0000:00:19.0 'Ethernet Connection I217-V' if=eno1 drv=e1000e
> unused=uio_pci_generic *Active*
> > >
> > > Other network devices
> > > =====================
> > > <none>
> > >
> > > and then I tried to run testpmd:
> > >
> > > sudo ./testpmd -b 0000:03:00.0 -b 0000:03:02.0 -c 0xf -n2 --
> --nb-cores=1 --nb-ports=0 --rxd=2048 --txd=2048 --mbcache=512 --burst=512
> >
> >
> http://dpdk.org/doc/guides/testpmd_app_ug/run_app.html#testpmd-command-line-options
> >
> > The -b option black lists your PCI devices, you don't need those. The
> > --nb-ports is of course the number of ports, it cannot be 0.
> >
> > > ...
> > > EAL: Ask a virtual area of 0x400000 bytes
> > > EAL: Virtual area found at 0x7f1549800000 (size = 0x400000)
> > > EAL: Requesting 1024 pages of size 2MB from socket 0
> > > EAL: TSC frequency is ~3699999 KHz
> > > EAL: Master lcore 0 is ready (tid=de94a8c0;cpuset=[0])
> > > EAL: lcore 2 is ready (tid=487fd700;cpuset=[2])
> > > EAL: lcore 3 is ready (tid=47ffc700;cpuset=[3])
> > > EAL: lcore 1 is ready (tid=48ffe700;cpuset=[1])
> > > EAL: No probed ethernet devices
> > > EAL: Error - exiting with code: 1
> > >    Cause: Invalid port 0
> > >
> > > I tried --nb-ports={0,1,2} but neither of them works. BTW, what does
> this option it mean? :)
> > > I could not find any description in the docs nor in the help (maybe
> I've omitted something).
> > >
> > >
> > > Well, if I manage the testpmd to work I need a packet generator,
> right? I've downloaded
> > > the dpdk-pktgen. And I am lost again. How can I start it?
> > >
> > > After several attempts (mostly trying to use the
> pktgen-master/slave.sh, what is
> > > their purpose?), the most "successful" output was:
> > >
> > > ...
> > > EAL: Detected lcore 0 as core 0 on socket 03 handles port 1 rx & core
> 4 handles port 0-7 tx
> > > EAL: Detected lcore 1 as core 1 on socket 0 as it does not matter to
> the syntax.
> > > EAL: Detected lcore 2 as core 0 on socket 0
> > > EAL: Detected lcore 3 as core 1 on socket
> 0p/app/x86_64-native-linuxapp-gcc (master *%=)
> > > EAL: Support maximum 128 logical core(s) by configuration.
> > > EAL: Detected 4 lcore(s)
> > > EAL: No free hugepages reported in hugepages-2048kB
> >
> > You either don't have hugepages or there aren't any free left.
> >
> > > PANIC in rte_eal_init():
> > > Cannot get hugepage information
> > > 6: [./pktgen(_start+0x29) [0x41abc9]]
> > > 5: [/usr/lib/libc.so.6(__libc_start_main+0xf0) [0x7f93eadcc790]]
> > > 4: [./pktgen(main+0x140) [0x419d80]]
> > > 3: [./pktgen(rte_eal_init+0xd2b) [0x4bb8bb]]
> > > 2: [./pktgen(__rte_panic+0xc9) [0x419ae5]]
> > > 1: [./pktgen(rte_dump_stack+0x16) [0x4c3946]]
> > > Aborted (core dumped)
> > >
> > > I'd like to run a simple scenario, just sending packets from one NIC
> to the other (or
> > > something similar) and measure the throughput. Could you please help
> me?
> > >
> > > Regards
> > > Jan Viktorin
> > >
>
>
>
> --
>    Jan Viktorin                  E-mail: Viktorin@RehiveTech.com
>    System Architect              Web:    www.RehiveTech.com
>    RehiveTech
>    Brno, Czech Republic
>