From: Jesper Dangaard Brouer <bro...@redhat.com> Date: Tue, 15 Aug 2017 21:11:03 +0200
> The main purpose of this tracepoint is to monitor bulk dequeue > in the network qdisc layer, as it cannot be deducted from the > existing qdisc stats. > > The txq_state can be used for determining the reason for zero packet > dequeues, see enum netdev_queue_state_t. > > Notice all packets doesn't necessary activate this tracepoint. As > qdiscs with flag TCQ_F_CAN_BYPASS, can directly invoke > sch_direct_xmit() when qdisc_qlen is zero. > > Remember that perf record supports filters like: > > perf record -e qdisc:qdisc_dequeue \ > --filter 'ifindex == 4 && (packets > 1 || txq_state > 0)' > > Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com> I'll apply this to net-next, thanks Jesper.
