[Intel-wired-lan] [v3 next PATCH S32 06/13] i40e/i40evf: Faster RX via avoiding fcoe

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Harshitha Ramamurthy
> Sent: Friday, April 01, 2016 3:56 AM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [v3 next PATCH S32 06/13] i40e/i40evf: Faster RX
> via avoiding fcoe
> 
> From: Jesse Brandeburg <jesse.brandeburg at intel.com>
> 
> As it turns out, calling into other files from hot path hurts performance a lot.
> In this case the majority of the time we call "check fcoe" and the packet is
> *not* fcoe, but this call was taking 5% of our total cycles spent on receive.
> 
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg at intel.com>
> Change-ID: I080552c26e7060bc7b78504dc2763f6f0b3d8c76
> ---
> Testing Hints: Make sure RX still works, and that perf top doesn't show
> i40e_handle_fcoe_status.
> 
>  drivers/net/ethernet/intel/i40e/i40e_fcoe.c   | 12 +-----------
>  drivers/net/ethernet/intel/i40e/i40e_txrx.c   |  8 ++++++--
>  drivers/net/ethernet/intel/i40e/i40e_txrx.h   | 10 ++++++++++
>  drivers/net/ethernet/intel/i40evf/i40e_txrx.c |  4 +++-
> drivers/net/ethernet/intel/i40evf/i40e_txrx.h | 10 ++++++++++
>  5 files changed, 30 insertions(+), 14 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>
RX works properly, perf top doesn't show i40e_handle_fcoe_status