Hi, Stéphane Ancelot <sance...@numalliance.com> writes:
> Hi, > > I am trying to setup my network queue for offline time based configuration. > > initial setup is : > > tc qdisc show dev eth1: > > qdisc mq 0: root > > qdisc pfifo_fast 0: parent :1 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 > 1 1 1 > > > I won't need pfifo , I have to send one frame at a precise xmit time > (high prio), and then maybe some other frames (with low priority) > > > I want to setup offload time based xmit. > > /sbin/tc qdisc add dev eth1 root handle 100:1 etf delta 100000 clockid > CLOCK_REALTIME offload > Because the common (expected?) use case for ETF is using it on a system that is running ptp4l (for example), and so, has the NIC PHC clock using the TAI clock reference, we only accept the clockid to be CLOCK_TAI. (Perhaps you are using an old version of iproute2, because a clearer message should have been printed together with the error as well, anyway there should be something in dmesg too) That said, when I need to run some experiments with ETF, and do not care about having the PHC clock is sync with anything else, I use phc2sys to force the TAI offset to be zero. Something like this: $ phc2sys -c $IFACE -s CLOCK_REALTIME -O 0 -m And install ETF as "usual", something like this: $ tc qdisc add dev $IFACE root handle 100:1 etf delta 100000 clockid CLOCK_TAI offload Hope this helps. Cheers, -- Vinicius
