[dpdk-dev] DPDK qos support for 40G port
Stephen Hemminger
stephen at networkplumber.org
Fri Aug 18 19:21:58 CEST 2017
On Fri, 18 Aug 2017 11:24:12 +0000
"Dumitrescu, Cristian" <cristian.dumitrescu at intel.com> wrote:
> Hi Kevin,
>
> > Hi Cristian,
> > Sorry to bother again, could you give suggestions/hints of code change to
> > support single 40G port? Because in our setup, we will use single 40G port
> > (Intel XL710) as the network interface.
> >
> > Or is there any workaround to bypass the limitation?(we are not willing to
> > use 4*10G setup)
> >
> > Thanks.
> >
>
> Probably the easiest thing to do as workaround to support single port of 40GbE rate is to change the code so that each credit is equivalent to 2 bytes instead of one. This is likely to result in some scheduling accuracy loss, but it can be implemented relatively quickly while avoiding complex code changes.
>
> Regards,
> Cristian
>
Maybe it is time to deprecate existing QoS since it has so many fixed limits
and start a new version which supports up to 400G and many more classes.
Something that integrated better with your new QoS framework.
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