[Intel-wired-lan] [i40e][PLP reording frame]

[Intel-wired-lan] [i40e][PLP reording frame]

[Joerg.Hunsche]

Hello,
we use INTEL X710-DA2 with i40e-2.10.19.30.
Configured socket flags SOCK_RAW and socket option PACKET_QDISC_BYPASS to bypass queuing, sending single-threaded.

When sending PLP-Ethernet-frames we observe a problem, that after ~2h a PLP-Ethernet-frame is send about 250frames later than it should be.
Our assumption is, that somehow more than one TX-queue is used, what we have to avoid.

Is there any configuration of the driver possible configuring a single Tx-queue?
Is there any means to get the driver to a state that only a single Tx-queue is used?

Thank you for your support.
J?rg Hunsche

EB Driving the Future of Software
Wolfgang-Paul Str. 4, 89081 Ulm
Phone: +49913177017653
Joerg.Hunsche at elektrobit.com<mailto:Joerg.Hunsche@elektrobit.com>
http://automotive.elektrobit.com<http://automotive.elektrobit.com/>

Elektrobit Automotive GmbH, Am Wolfsmantel 46, 91058 Erlangen, Germany
Managing Directors Alexander Kocher, Gregor Zink
Register Court F?rth HRB 4886

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[Intel-wired-lan] [i40e][PLP reording frame]

[Joerg.Hunsche]

Good Morning Don,
in the meantime we figured out that compiling the driver with
#define I40E_DEFAULT_QUEUES_PER_VF      1
Did the job.

Thank you for your fast response anyhow.

The issue is solved.
Regards J?rg.

From: Buchholz, Donald <donald.buchholz at intel.com<mailto:donald.buchholz@intel.com>>
Sent: Friday, October 25, 2019 3:51 AM
To: Hunsche, J?rg <Joerg.Hunsche at elektrobit.com<mailto:Joerg.Hunsche@elektrobit.com>>
Cc: Prochownik, Adam <extern.Adam.Prochownik at elektrobit.com<mailto:extern.Adam.Prochownik@elektrobit.com>>
Subject: RE: [Intel-wired-lan] [i40e][PLP reording frame]

Hi J?rg,


1.       Please send the full complement of PCI Vendor:Device:Subdevice Vendor:SubdeviceID identifiers (or output from "lspci -nn -v" command).

2.       Please send the output of "ethtool -i  ... " for *both* ports on this NIC?

- Don Buchholz
- SW Applications Engineer
- Intel Corporation - DCG
- Ethernet Customer Services
- (503) 264-2010  [desk]
- (503) 939-0848  [cell]


From: Intel-wired-lan [mailto:intel-wired-lan-bounces at osuosl.org] On Behalf Of Joerg.Hunsche at elektrobit.com<mailto:Joerg.Hunsche@elektrobit.com>
Sent: Wednesday, October 23, 2019 6:50 AM
To: intel-wired-lan@osuosl.org<mailto:intel-wired-lan@osuosl.org>
Cc: extern.Adam.Prochownik at elektrobit.com<mailto:extern.Adam.Prochownik@elektrobit.com>
Subject: [Intel-wired-lan] [i40e][PLP reording frame]

Hello,
we use INTEL X710-DA2 with i40e-2.10.19.30.
Configured socket flags SOCK_RAW and socket option PACKET_QDISC_BYPASS to bypass queuing, sending single-threaded.
When sending PLP-Ethernet-frames we observe a problem, that after ~2h a PLP-Ethernet-frame is send about 250frames later than it should be.
Our assumption is, that somehow more than one TX-queue is used, what we have to avoid.

Is there any configuration of the driver possible configuring a single Tx-queue?
Is there any means to get the driver to a state that only a single Tx-queue is used?

Thank you for your support.
J?rg Hunsche

EB Driving the Future of Software
Wolfgang-Paul Str. 4, 89081 Ulm
Phone: +49913177017653
Joerg.Hunsche at elektrobit.com<mailto:Joerg.Hunsche@elektrobit.com>
http://automotive.elektrobit.com<http://automotive.elektrobit.com/>

Elektrobit Automotive GmbH, Am Wolfsmantel 46, 91058 Erlangen, Germany
Managing Directors Alexander Kocher, Gregor Zink
Register Court F?rth HRB 4886

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