[dpdk-dev] Accurate timestamps in received packets

[Lu, Wenzhuo]

Hi Francesco,
Why not searching ieee1588 in the dpdk git repository?  Surely you'll find something.

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Montorsi, Francesco
> Sent: Friday, October 9, 2015 11:30 PM
> To: dev at dpdk.org
> Subject: [dpdk-dev] Accurate timestamps in received packets
> 
> Hi all,
> I'm using rte_eth_rx_burst() to successfully retrieve packets from a DPDK-
> enabled port. I can process the packet and everything works fine. My only issue
> is that I cannot find any mean to retrieve a timestamp for every single packet. As
> a dirty-workaround I'm using gettimeofday() to timestamp incoming packets but
> I would rather like to retrieve a more accurate and realistic timestamp from the
> Ethernet PHY layer instead. For example if I receive 32 packets in a single burst
> I'm just assigning the packets timestamp with 1ns of difference (using
> gettimeofday() for the initial time offset).
> 
> Is there a way to retrieve a realistic timestamp from the Ethernet PHY layer?
> 
> I found this patch searching on the web:
> 
> http://www.wand.net.nz/trac/libtrace/browser/Intel%20DPDK%20Patches/hard
> ware_timestamp.patch
> that is however related to an older DPDK version and works only for INTEL
> 82580 controllers... do you know if that simple patch linked above could be
> similarly ported to Intel 82599 and 82571 controllers? Is there any better/easier
> way to do that?
> 
> Thanks a lot,
> 
> Francesco Montorsi
> 
>