I was looking at the source code but I'm more OOP C++ than C. I found eth_ena_recv_pkts but is it possible for me to add a software timestamp before the mbuf is added to the ring buffer? This would be incredibly useful.
On Mon, 9 Sept 2024 at 09:31, Brandes, Shai <shaib...@amazon.com> wrote: > > > > מאת: Dpdk Newbie <dpdkuse...@gmail.com > > <mailto:dpdkuse...@gmail.com> > > > תאריך: 9 בספט׳ 2024 01:32 > > נושא: [EXTERNAL] Does DPDK provide RX timestamps? > > אל: dev@dpdk.org <mailto:dev@dpdk.org> > > עותק: > > > > > > > > Hi. I am using Intel (i210) and AWS ENA network interface cards. > > > > > > > > I would like to measure the following RX latencies: > > > > 1) NIC to DPDK packet ring buffer > > > > 2) DPDK packet ring buffer to application via rte_eth_rx_burst. > > > [Brandes, Shai] Hi, currently AWS doesn’t support HW timestamping. > In order to get the full Rx latency you need to measure rte_eth_rx_burst as > it is mapped to ENA driver routine eth_ena_recv_pkts which covers the entire > flow including NIC to DPDK packet ring buffer flow (ena_com_rx_pkt) > > All the best > Shai > > > I don't mind measuring in nanoseconds or CPU cycles. > > > > > > Unfortunately I cannot find any mention of hardware timestamps. > > > > > > I found brief references to mbuf containing a timestamp in the dynamic > > fields, but nothing definitive. > > > > Could someone please clarify what the situation is? > > > > Thanks, >
