On Monday, December 4, 2023 11:00 PM, Willem de Bruijn wrote: >Jesper Dangaard Brouer wrote: >> >> >> On 12/3/23 17:51, Song Yoong Siang wrote: >> > This patch is tested with stmmac on Intel Tiger Lake platform. Refer to >> > result below, the delta between pre-determined launch time and actual HW >> > transmit complete time is around 24 us. >> >> Is there any NIC setup (e.g. ethtool/qdisc) requirements to enable HW >> for this feature? > >Judging from how we currently use this with FQ and ETF, no. > >See for instance tools/testing/selftests/net/so_txtime.sh For stmmac, we need to enable per queue launch time support by using tc qdisc etf offload command. I believe igc also using the same way. I will add into documentation to make it clear that XDP_TXMD_FLAGS_LAUNCH_TIME only used to pass the launch time value, not enable launch time feature.
