Re: [Linuxptp-users] HWTSTAMP_TX_ONESTEP_SYNC vs HWTSTAMP_TX_ON

[Keller, J. E <jac...@in...>]

> -----Original Message-----
> From: Richard Cochran [mailto:ric...@gm...]
> Sent: Tuesday, July 30, 2013 1:12 AM
> To: Keller, Jacob E
> Cc: Ledda William EXT; lin...@li...
> Subject: Re: [Linuxptp-users] HWTSTAMP_TX_ONESTEP_SYNC vs
> HWTSTAMP_TX_ON
> 
> On Mon, Jul 29, 2013 at 07:12:20PM +0000, Keller, Jacob E wrote:
> >
> > FYI, the i210 should have hardware support for doing onestep (no one
> > enabled it)
> 
> It is useless, because:
> 
> 1. you have to tell it the offset (different for udp4/udp6/layer2)
> 2. it does not correct the udp checksum
> 
> Thanks,
> Richard

Yep. That would limit it to L2 or UDP without checksum... Which is kind of pointless. It's difficult to get the hardware guys here to care too much about the feature.

- Jake