Hi Ayshathul Thuhara,
l3fwd parameters in the doc are important: they say how many cores/queues to
use.
Try playing with them, adding testpmd specific parameters.
sudo ./build/app/dpdk-testpmd -a 01:00.0 -l
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 -- -i --rxq=16 --txq=16
--nb-cores=16
Regards,
Ernesto
From: Ayshathul Thuhara <[email protected]>
Sent: Friday, February 13, 2026 10:04
To: Ernesto Ruffini <[email protected]>
Cc: 'dev' <[email protected]>; [email protected]; [email protected]
Subject: Re: Guidance Required to Improve Throughput on ConnectX-7 (1x400G)
with DPDK v23.07
Hi Ernesto,
As an additional observation, I tested the setup using iperf3 and was able
to achieve throughput of approximately 92~95 Gbps. However, when running the
DPDK-Testpmd application, the throughput does not reach similar values.
Thanks and regards,
Ayshathul Thuhara
_____
From: Ayshathul Thuhara <[email protected]
<mailto:[email protected]> >
Sent: 13 February 2026 14:24
To: Ernesto Ruffini <[email protected] <mailto:[email protected]> >
Cc: 'dev' <[email protected] <mailto:[email protected]> >; [email protected]
<mailto:[email protected]> <[email protected] <mailto:[email protected]>
>; [email protected] <mailto:[email protected]> <[email protected]
<mailto:[email protected]> >
Subject: Re: Guidance Required to Improve Throughput on ConnectX-7 (1x400G)
with DPDK v23.07
Hi Ernesto,
Thankyou for the suggestion.
I will look into
"https://fast.dpdk.org/doc/perf/DPDK_23_11_NVIDIA_NIC_performance_report.pdf
" , but here the tests uses external device for traffic generator.
Yes, with ethtool it shows 400Gbps.
The module can support upto 100Gbps. But it should have increased more than
10Gbps. I will disable AN and check once.
Thanks and regards,
Ayshathul Thuhara
_____
From: Ernesto Ruffini <[email protected] <mailto:[email protected]> >
Sent: 13 February 2026 14:19
To: Ayshathul Thuhara <[email protected]
<mailto:[email protected]> >; [email protected]
<mailto:[email protected]> <[email protected] <mailto:[email protected]> >
Cc: 'dev' <[email protected] <mailto:[email protected]> >; [email protected]
<mailto:[email protected]> <[email protected] <mailto:[email protected]>
>
Subject: RE: Guidance Required to Improve Throughput on ConnectX-7 (1x400G)
with DPDK v23.07
Hi Ayshathul,
I think the best is to follow
https://fast.dpdk.org/doc/perf/DPDK_23_11_NVIDIA_NIC_performance_report.pdf
Did you check with ethtool or similar the actual connection speed? ethtool
linux-nic-name | grep Speed
Maybe your module limits it to 10Gbps. In case try to disable
auto-negotiation
Regards,
Ernesto
From: Ayshathul Thuhara <[email protected]
<mailto:[email protected]> >
Sent: Friday, February 13, 2026 07:36
To: [email protected] <mailto:[email protected]>
Cc: dev <[email protected] <mailto:[email protected]> >; [email protected]
<mailto:[email protected]>
Subject: Guidance Required to Improve Throughput on ConnectX-7 (1x400G) with
DPDK v23.07
Dear Team,
I hope this message finds you well.
I am currently performing testing on ConnectX-7 with 1x400G hardware using
DPDK v23.07. However, I am unable to achieve data transfer rates beyond 10
Gbps. While reviewing the DPDK mailing list, I came across your previous
responses in the related discussion
(https://mails.dpdk.org/archives/users/2024-July/007767.html), where you
mentioned achieving throughput of around 250 Gbps and above.
Could you kindly advise on the configuration changes or optimizations
required to improve throughput in this setup?
For reference, I am using an OSFP loopback module for testing, where the
same port is used for both transmission and reception (single-port loopback
setup).
CX-7 Firmware: 28.45.1200
CPU : Intel(R) Core(TM) i7-14700
Command used : sudo ./build/app/dpdk-testpmd -a 01:00.0 -- -i
I would greatly appreciate your guidance.
Thank you in advance, and I look forward to your response.
Thanks and regards,
Ayshathul Thuhara
