Re: [dpdk-users] VF RSS availble in I350-T2?

[".." <hyperhead@gmail.com>]

Hi Paul,

No I didn't spot that.

I guess my only option now is 10gb card that supports it.

Thanks.

On Wed, 13 Dec 2017, 12:35 Paul Emmerich, <emmericp@net.in.tum.de> wrote:

> Did you consult the datasheet? It says that the VF only supports one queue.
>
> Paul
>
> > Am 12.12.2017 um 13:58 schrieb .. <hyperhead@gmail.com>:
> >
> > I assume my message was ignored due to it not being related to dpdk
> > software?
> >
> >
> > On 11 December 2017 at 10:14, .. <hyperhead@gmail.com> wrote:
> >
> >> Hi,
> >>
> >> I have an intel I350-T2 which I use for SR-IOV, however, I am hitting
> some
> >> rx_dropped on the card when I start increasing traffic. (I have got more
> >> with the same software out of a identical bare metal system)
> >>
> >> I am using the Intel igb driver on Centos 7.2 (downloaded from Intel not
> >> the driver installed with Centos), so the RSS parameters amongst others
> are
> >> availbe to me
> >>
> >> This then led me to investigate the interrupts on the tx rx ring buffers
> >> and I noticed that the interface (vfs enabled) only had on tx/rx queue.
> Its
> >> distributed between   This is on the KVM Host
> >>
> >>             CPU0       CPU1       CPU2       CPU3       CPU4
> >> CPU5       CPU6       CPU7       CPU8
> >> 100:          1         33        137          0          0
> >> 0          0          0          0     IR-PCI-MSI-edge      ens2f1
> >> 101:       2224          0          0       6309     178807
> >> 0          0          0          0     IR-PCI-MSI-edge
> ens2f1-TxRx-0
> >>
> >> Looking at my standard nic ethernet ports I see 1 rx and 4 rx queues
> >>
> >> On the VM I only get one tx one rx queue ( I know all the interrupts are
> >> only using CPU0) but that is defined in our builds.
> >>
> >> egrep "CPU|ens11" /proc/interrupts
> >>                   CPU0       CPU1       CPU2       CPU3       CPU4
> >> CPU5       CPU6       CPU7
> >> 34:  715885552      0          0          0          0
> >> 0          0          0          0           PCI-MSI-edge
> ens11-tx-0
> >> 35:  559402399      0          0          0          0
> >> 0          0          0          0           PCI-MSI-edge
> ens11-rx-0
> >>
> >> I activated RSS in my card, and can set if, however if I use the param
> >> max_vfs=n then it  defaults back to to 1 rx 1 tx queue per nic port
> >>
> >> [  392.833410] igb 0000:07:00.0: Using MSI-X interrupts. 1 rx queue(s),
> 1
> >> tx queue(s)
> >> [  393.035408] igb 0000:07:00.1: Using MSI-X interrupts. 1 rx queue(s),
> 1
> >> tx queue(s)
> >>
> >> I have been reading some of the dpdk older posts and see that VF RSS is
> >> implemented in some cards, does anybody know if its available in this
> card
> >> (from reading it only seemed the 10GB cards)
> >>
> >> One of my plans aside from trying to create more RSS per VM is to add
> more
> >> CPUS to the VM that are not isolated so that the rx and tx queues can
> >> distribute their load a bit to see if this helps.
> >>
> >> Also is it worth investigating the VMDq options, however I understand
> this
> >> to be less useful than SR-IOV which works well for me with KVM.
> >>
> >>
> >> Thanks in advance,
> >>
> >> Rolando
> >>
>
> --
> Chair of Network Architectures and Services
> Department of Informatics
> Technical University of Munich
> Boltzmannstr. 3
> 85748 Garching bei München, Germany
>
>
>
>
>