From: "Zhao1, Wei" <wei.zhao1@intel.com>
To: Kilian Holzinger <kilian.holzinger@gmail.com>,
"users@dpdk.org" <users@dpdk.org>
Cc: "Guo, Jia" <jia.guo@intel.com>
Subject: Re: [dpdk-users] DPDK e1000 Legacy Transmit Descriptor Format
Date: Thu, 4 Jun 2020 10:10:42 +0000 [thread overview]
Message-ID: <MWHPR11MB13913D651CC92FA0F152A10AB7890@MWHPR11MB1391.namprd11.prod.outlook.com> (raw)
In-Reply-To: <MWHPR11MB1391D8F7EA1E6FF67DBE8212B7890@MWHPR11MB1391.namprd11.prod.outlook.com>
Hi，Kilian Holzinger
> -----Original Message-----
> From: Zhao1, Wei
> Sent: Thursday, June 4, 2020 6:03 PM
> To: Kilian Holzinger <kilian.holzinger@gmail.com>; users@dpdk.org
> Cc: Guo, Jia <jia.guo@intel.com>
> Subject: RE: DPDK e1000 Legacy Transmit Descriptor Format
>
> Hi, Kilian Holzinger
>
>
> > -----Original Message-----
> > From: Kilian Holzinger <kilian.holzinger@gmail.com>
> > Sent: Wednesday, June 3, 2020 11:21 PM
> > To: users@dpdk.org
> > Cc: Zhao1, Wei <wei.zhao1@intel.com>; Guo, Jia <jia.guo@intel.com>
> > 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
prev parent reply other threads:[~2020-06-04 10:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-03 15:21 Kilian Holzinger
2020-06-04 10:03 ` Zhao1, Wei
2020-06-04 10:10 ` Zhao1, Wei [this message]
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