[Intel-wired-lan] [RFC net-next 0/5] TSN: Add qdisc-based config interfaces for traffic shapers
Richard Cochran
richardcochran at gmail.com
Fri Sep 1 13:03:11 UTC 2017
I happy to see this posted. At first glance, it seems like a step in
the right direction.
On Thu, Aug 31, 2017 at 06:26:20PM -0700, Vinicius Costa Gomes wrote:
> * Time-aware shaper (802.1Qbv):
...
> S 0x01 300
> S 0x03 500
>
> This means that there are two intervals, the first will have the gate
> for traffic class 0 open for 300 nanoseconds, the second will have
> both traffic classes open for 500 nanoseconds.
The i210 doesn't support this in HW, or does it?
> * Frame Preemption (802.1Qbu):
>
> To control even further the latency, it may prove useful to signal which
> traffic classes are marked as preemptable. For that, 'taprio' provides the
> preemption command so you set each traffic class as preemptable or not:
>
> $ tc qdisc (...) \
> preemption 0 1 1 1
Neither can the i210 preempt frames, or what am I missing?
The timing of this RFC is good, as I am just finishing up an RFC that
implements time-based transmit using the i210. I'll try and get that
out ASAP.
Thanks,
Richard
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