Hi Dominik,

I don't have any concerns, I only wanted to know, why it will be removed, because it can increase network performance a lot.

Thank you very much for your explanation.

I fully understand, that you want to remove features, when nobody is using them.

BR Florian

Von: "Dominik Holler" <dholler@redhat.com>
An: "Florian Schmid" <fschmid@ubimet.com>
CC: "Ales Musil" <amusil@redhat.com>, "users" <users@ovirt.org>, "devel" <devel@ovirt.org>
Gesendet: Mittwoch, 4. November 2020 12:15:47
Betreff: Re: [ovirt-users] Re: Removal of dpdk

Hi Florian,

thanks for your thoughts!

On Tue, Nov 3, 2020 at 3:21 PM Florian Schmid via Users <users@ovirt.org> wrote:

Hi Ales,

what do you mean with "not maintained for a long time"?

The oVirt integration of dpdk was not maintained.

DPDK is heavily developed and make the linux network extremely fast.

I don't think, that SR-IOV can replace it,

The removal of dpdk is about removing the dpdk support from oVirt hosts only.

We wonder if there is someone using dpdk to attach oVirt VMs to physical NICs.

We are aware that many users use SR-IOV, especially for scenarios of enabling a high count of Ethernet frames for VMs or requiring a low latency,

but we are not aware of users using dpdk to connect the oVirt VMs to the physical NICs of the host.

because packets must be still processed by the kernel, which is really slow and CPU demanding.

In SR-IOV the packets might be processed by the guest kernel, not but the host kernel.

oVirt is focused on the host kernel, while the guest OS is managed by the user of oVirt.

Did this explanation address your concerns?

BR Florian

Von: "Ales Musil" <amusil@redhat.com>
An: "Nir Soffer" <nsoffer@redhat.com>
CC: "users" <users@ovirt.org>, "devel" <devel@ovirt.org>
Gesendet: Dienstag, 3. November 2020 13:56:12
Betreff: [ovirt-users] Re: Removal of dpdk

On Tue, Nov 3, 2020 at 1:52 PM Nir Soffer <nsoffer@redhat.com> wrote:
On Tue, Nov 3, 2020 at 1:07 PM Ales Musil <amusil@redhat.com> wrote:
Hello,
we have decided to remove dpdk in the upcoming version of oVirt namely 4.4.4. Let us know if there are any concerns about this.

Can you give more info why we want to remove this feature, and what is
the replacement for existing users?

Nir

Sure,
the feature was only experimental and not maintained for a long time. The replacement is to use SR-IOV
which is supported by oVirt.

Thanks,
Ales

--

Ales Musil

Software Engineer - RHV Network

Red Hat EMEA

amusil@redhat.com IM: amusil

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