Hiļ¼Kilian Holzinger > -----Original Message----- > From: Zhao1, Wei > Sent: Thursday, June 4, 2020 6:03 PM > To: Kilian Holzinger <[email protected]>; [email protected] > Cc: Guo, Jia <[email protected]> > Subject: RE: DPDK e1000 Legacy Transmit Descriptor Format > > Hi, Kilian Holzinger > > > > -----Original Message----- > > From: Kilian Holzinger <[email protected]> > > Sent: Wednesday, June 3, 2020 11:21 PM > > To: [email protected] > > Cc: Zhao1, Wei <[email protected]>; Guo, Jia <[email protected]> > > Subject: DPDK e1000 Legacy Transmit Descriptor Format > > > > Hello, > > > > today I was trying to find a way to use the Intel LaunchTime feature > > of the i210 NIC in conjunction with DPDK IGB PMD driver. I thought it > > might be easy to get it to work, since it might be just some register > > that is missing. However I discovered that the e1000 driver uses the > > legacy transmit descriptor format and therefore the Launch Time feature is > not easily available at all in DPDK. > > You are righ, it seems igb driver do not get "DMA Time Stamp" at all, although > it has use adv descriptor.
Sorry, what you need is " LaunchTime " , that is not support indeed. > > > Do you see any other options I have to use this feature in DPDK? > > No > > > Are there plans to move to the new Transmit Descriptor Format? > > No plan, You had better enable this field yourself, no need to switch Transmit > Descriptor Format, because e1000 it has use adv tx descriptor. > > > > > Best regards > > Kilian Holzinger
