Re: [dpdk-users] error running two instances of pktgen

["Wiles, Keith" <keith.wiles@intel.com>]

> On Jun 28, 2018, at 3:53 AM, Stefano Salsano <stefano.salsano@uniroma2.it> wrote:
> 
> Il 2018-06-28 10:32, Muhammad Zain-ul-Abideen ha scritto:
>> I think it is some sort of cli command issue now, like socket-mem or blacklisting the port.
>> Adding Keith Wiles, the father of pktgen
> 
> thank you Muhammad, here is the commands that we run now and the overall recap of the problems
> 
> sudo -E ./app/x86_64-native-linuxapp-gcc/pktgen  -l 5-8 -n 3 --file-prefix pg0 --proc-type auto -b 06:00.0 -- -P -m "6.0"
> 
> it works, then we have the error in the second instance:
> 
> sudo -E ./app/x86_64-native-linuxapp-gcc/pktgen -l 0-4 -n 3 --file-prefix pg1 --proc-type secondary -b 06:00.1 -- -P -m “1.0"

I read a bit more the of email :-)

If you do use —proc-type auto it fine as the —file-prefix being different will make them both primary processes.

Make sure you have enough memory allocated to support both instances of pktgen. I normally use the —socket-mem 512,512 in both commands, but this means I must have 2048 amount of huge pages allocated.

BTW, which version of pktgen and dpdk are you using, plus what OS.

> 
> EAL: Detected 32 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Multi-process socket /var/run/dpdk/pg1/mp_socket_12381_2a519caf5992b0
> EAL: failed to send to (/var/run/dpdk/pg1/mp_socket) due to Connection refused
> EAL: Fail to send request /var/run/dpdk/pg1/mp_socket:bus_vdev_mp
> vdev_scan(): Failed to request vdev from primary
> EAL: Probing VFIO support...
> EAL: Could not map memory from primary process
> EAL: FATAL: Cannot init memory
> 
> EAL: Cannot init memory
> 
> I don't know if it is relevant, but when running the first command I get a warning about hugepages (and then the pktgen works well)
> EAL: Detected 32 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Auto-detected process type: PRIMARY
> EAL: Multi-process socket /var/run/dpdk/pg0/mp_socket
> EAL: No free hugepages reported in hugepages-1048576kB
> 
> 
> if I run both instances with --port-type auto it detects primary mode for both
> EAL: Detected 32 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Auto-detected process type: PRIMARY
> EAL: Multi-process socket /var/run/dpdk/pg1/mp_socket
> EAL: No free hugepages reported in hugepages-1048576kB
> EAL: Probing VFIO support...
> 
> and then the second instance fails like this
>    Create: Default TX  0:0  - Memory used (MBUFs 16384 x (size 2176 + Hdr 128)) + 192 =  36865 KB, headroom 128
> !PANIC!: Cannot create mbuf pool (Default TX  0:0) port 0, queue 0, nb_mbufs 16384, socket_id 0: No such file or directory
> PANIC in pktgen_mbuf_pool_create():
> Cannot create mbuf pool (Default TX  0:0) port 0, queue 0, nb_mbufs 16384, socket_id 0: No such file or directory6: [./app/x86_64-native-linuxapp-gcc/pktgen(_start+0x29) [0x466139]]
> 5: [/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7ffff6cae830]]
> 4: [./app/x86_64-native-linuxapp-gcc/pktgen(main+0x598) [0x460388]]
> 3: [./app/x86_64-native-linuxapp-gcc/pktgen(pktgen_config_ports+0x18ad) [0x491aed]]
> 2: [./app/x86_64-native-linuxapp-gcc/pktgen(__rte_panic+0xc3) [0x45769b]]
> 1: [./app/x86_64-native-linuxapp-gcc/pktgen(rte_dump_stack+0x2b) [0x50aadb]]
> Aborted
> 
> 
> -- 
> *******************************************************************
> Stefano Salsano
> Professore Associato
> Dipartimento Ingegneria Elettronica
> Universita' di Roma Tor Vergata
> Viale Politecnico, 1 - 00133 Roma - ITALY
> 
> http://netgroup.uniroma2.it/Stefano_Salsano/
> 
> E-mail  : stefano.salsano@uniroma2.it
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> 

Regards,
Keith