On Thu, Feb 18, 2021 at 1:23 AM Eelco Chaudron <echau...@redhat.com> wrote:
>
>
>
> On 17 Feb 2021, at 18:41, William Tu wrote:
>
> >>
> >>>> Information Rate). High priority traffic is routed to queue 10,
> >>>> which marks
> >>>> all traffic as CIR, i.e. Green. All low priority traffic, queue 20,
> >>>> is
> >>>> marked as EIR, i.e. Yellow::
> >>>>
> >>>> $ ovs-vsctl --timeout=5 set port dpdk1 qos=@myqos -- \
> >>>> --id=@myqos create qos type=trtcm-policer \
> >>>> - other-config:cir=52000 other-config:cbs=2048 \
> >>>> - other-config:eir=52000 other-config:ebs=2048 \
> >>
> >> 52000 is fine as our documentation states cir, eir are in bytes per
> >> second, minus the ethernet header.
> >> So (64-12) * 1000 = 52000
> >
> > How come it's not minus 14-byte ethernet header?
>
> You are right, it should be 14, miscounted the rte_ether_hdr structure size :(
>
Thank you!
at vswitchd/vswitch.xml, it uses "46", should I change it to "64- 14 = 50"?
calculated by (pps x packet data size). For example assuming a user
wishes to limit a stream consisting of 64 byte packets to 1 million
packets per second the EIR would be set to to to 46000000. This value
can be broken into '1,000,000 x 46'. Where 1,000,000 is the policing
rate for the number of packets per second and 46 represents the size
of the packet data for a 64 byte ip packet.
William
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