[dpdk-dev] DPDK-pktgen not giving expected throughput

[Shailja Pandey <csz168117@iitd.ac.in>]

The command line for Pktgen is-

./app/app/x86_64-native-linuxapp-gcc/pktgen -c 0xfff -n 4 -- -T -P -m "[2].0,[4].1,[8].2,[10].3"

Configuration of the machine is-

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                32
On-line CPU(s) list:   0-31
Thread(s) per core:    2
Core(s) per socket:    8
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 63
Model name:            Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz
Stepping:              2
CPU MHz:               1204.226
CPU max MHz:           3400.0000
CPU min MHz:           1200.0000
BogoMIPS:              5195.08
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              20480K
NUMA node0 CPU(s):     0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30
NUMA node1 CPU(s):     1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31

Linux XeonE5 4.4.0-93-generic

Thanks!





>/On Jan 10, 2018, at 7:36 AM, Shailja Pandey <csz168117 at iitd.ac.in 
<https://dpdk.org/ml/listinfo/dev>> wrote: />//>/Hi, />//>/We are performing experiments on Dell Poweredge R430 server, which is 
based on Haswell architecture based xeon-2640 v3 processor. We have 
attached XL 710 NIC(2x40 GbE) to the machine and expect 59 Mpps packet 
generation per port. But pktgen is able to generate only 21 Mpps per 
port and we are not sure about the problem. />//>/We are using DPDK version 16.07 and DPDK-pktgen version 3.1.0. Is there 
any way to generate packets from pktgen at 118 Mpps ? /
What is the command line for Pktgen?

Using a single CPU you should be able to generate about 21Mpps, which tells me the configuration is not correct.

Pktgen needs N number of TX and RX cores to generate more traffic, plus the packets need to be spread across the cores using RSS. This means pktgen needs to be setup to generate packets with the 5 tuple difference to get all of the cores to receive the packets.

I need to know the command line and the configuration of the machine to help.
>//>/-- />//>/Thanks, />/Shailja />//
Regards,
Keith

-- 

Thanks,
Shailja