[Intel-wired-lan] [next-queue 15/17] fm10k: change default Tx ITR to 25usec

Keller, Jacob E jacob.e.keller at intel.com
Thu Oct 15 16:35:59 UTC 2015



> -----Original Message-----
> From: Alexander Duyck [mailto:alexander.duyck at gmail.com]
> Sent: Wednesday, October 14, 2015 7:24 PM
> To: Keller, Jacob E; intel-wired-lan at lists.osuosl.org
> Subject: Re: [Intel-wired-lan] [next-queue 15/17] fm10k: change default Tx
> ITR to 25usec
> 
> > There is no hardware ethernet flow control at all for the fm10k
> > interface.
> 
> There is a flow control mechanism in the form of DMA back pressure that
> can be exerted by the PEP interfaces.  It is controlled via the ethtool
> flow control interface.  I believe it is defaulted to off though since
> that is what is in the current upstream driver.
> 
> - Alex

Ah yes that. It is disabled.

Regards,
Jake


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