> 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,

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