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| /openbmc/linux/net/sched/ |
| H A D | sch_taprio.c | a1e6ad30 Tue Feb 07 07:54:34 CST 2023 Vladimir Oltean <vladimir.oltean@nxp.com> net/sched: taprio: calculate guard band against actual TC gate close time
taprio_dequeue_from_txq() looks at the entry->end_time to determine
whether the skb will overrun its traffic class gate, as if at the end of
the schedule entry there surely is a "gate close" event for it. Hint:
maybe there isn't.
For each schedule entry, introduce an array of kernel times which
actually tracks when in the future will there be an *actual* gate close
event for that traffic class, and use that in the guard band overrun
calculation.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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