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From: Stephen Hemminger <stephen@networkplumber.org>
To: madhukar mythri <madhukar.mythri@gmail.com>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] Failed to bring-up DPDK ports on Azure VM
Date: Mon, 19 Apr 2021 08:10:47 -0700
Message-ID: <20210419081047.0d2b463e@hermes.local> (raw)
In-Reply-To: <CAAUNki1ivZpu3ynq+v56DoqyPcyzsDgOYXRiYignnTkpH=sJPw@mail.gmail.com>

On Mon, 19 Apr 2021 11:58:22 +0530
madhukar mythri <madhukar.mythri@gmail.com> wrote:

> Hi Stephen,
> 
> Thanks for quick response.
> Yes this error is from a TAP driver from DPDK, but why this error/issue
> occurs only when configured with -2queues only ?
> Whereas with single or 4 queues it works Rx/Tx traffic works well.
> 
> And also, this issue occurs only on single port-0, whereas on other ports
> this error/issue is not seen.
> 
> 
> On Sun, Apr 18, 2021 at 9:08 PM Stephen Hemminger <
> stephen@networkplumber.org> wrote:  
> 
> > On Sun, 18 Apr 2021 17:51:09 +0530
> > madhukar mythri <madhukar.mythri@gmail.com> wrote:
> >  
> > > Hi,
> > >
> > > When we tried to launch a DPDK app on Azure VM with 2-queues,
> > > seeing following errors and thus we are not able to receive any traffic
> > > on these NIC ports(MLX5).
> > > On Azure VM, using "net_failsafe" PMD.
> > >
> > > =======================
> > > PORT 0 Max supports 16 rx queues and 16 tx queues (driver_name =
> > > net_failsafe, driver_type = 16)
> > > PORT 0 is polling for link-change, interrupts disabled
> > >  *rss_add_actions(): Failed to load BPF section l3_l4 (11): Resource
> > > temporarily unavailable*
> > >  net_failsafe: Failed to create flow on sub_device 1
> > >  add_flow(): create() fails for port 0; Reason: action not supported
> > > ===================
> > >
> > > This issue is seen with 2-queues only, whereas with 4-queues we are not
> > > seeing this issue.
> > >
> > > Does anybody faced similar issue and if any solution/work-around please  
> > let  
> > > me know.
> > >
> > > DPDK version: 20.11
> > > With RHEL: 7.9 version.
> > >
> > > Thanks,
> > > Madhukar.  
> >
> >
> > If you are using failsafe, make sure that you have the Mellanox drivers
> > enabled
> > in your DPDK build, also TAP device. You need to build with rdma-core
> > version 23 or
> > later, and you need to have the kernel modules for flower, multiq, and TAP.
> >
> > Turn on full DPDK logging and check the kernel log (dmesg).
> >  

No idea, look at the kernel log.  Might be related to RSS.


      reply	other threads:[~2021-04-19 15:10 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-18 12:21 madhukar mythri
2021-04-18 15:37 ` Stephen Hemminger
2021-04-19  6:28   ` madhukar mythri
2021-04-19 15:10     ` Stephen Hemminger [this message]

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