Hi Keunhong,
Thanks for your response. Seems ixgbe only supports hw timestamping for PTP packets. But I still don?t understand why igb and e1000 support hw timestamping all packets while ixgbe does not. ???: Keunhong Lee [mailto:dlrmsghd at gmail.com] ????: 2015?6?1? 11:51 ???: ?? ??? ??: dev at dpdk.org ??: Re: [dpdk-dev] How to set timestamp in 82599 NICs in DPDK? http://dpdk.org/browse/dpdk/tree/app/test-pmd/ieee1588fwd.c This code example contains enabling PTP with intel NICs. Keunhong. 2015-06-01 12:48 GMT+09:00 Keunhong Lee <dlrmsghd at gmail.com>: 82599 supports hw timestamping for PTP packets. I don't know whether it supports timestamping for general packets. http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L640 says that <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L640> 640 default: <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L641> 641 /* <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L642> 642 * register RXMTRL must be set in order to do V1 packets, <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L643> 643 * therefore it is not possible to time stamp both V1 Sync and <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L644> 644 * Delay_Req messages and hardware does not support <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L645> 645 * timestamping all packets => return error <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L646> 646 */ <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L647> 647 <http://lxr.free-electrons.com/ident?i=config> config->rx_filter = HWTSTAMP_FILTER_NONE; <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L648> 648 return - <http://lxr.free-electrons.com/ident?i=ERANGE> ERANGE; <http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c#L649> 649 } Keunhong. 2015-06-01 11:38 GMT+09:00 ?? ??? <chunhai.tan at colasoft.com.cn>: Hi I noticed that there is a patch which can set hardware timestamp for the received packets(http://www.wand.net.nz/trac/libtrace/browser/Intel%20DPDK%20Patches/ <http://www.wand.net.nz/trac/libtrace/browser/Intel%20DPDK%20Patches/hardware_timestamp.patch?rev=ce7153dbc6a13c18bf8033af08c1249527754168> hardware_timestamp.patch?rev=ce7153dbc6a13c18bf8033af08c1249527754168), but it only works in e1000 and igb NICs. I want to capture packets with timestamp info in 82599 NICs, what should I do? Could you give me some help? Thanks. Chunhai Tan
