netdev - RE: [Intel-wired-lan] [PATCH net-next 4/4] i40e, xsk: move buffer allocation out of the Rx processing loop

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Message-ID: <BN6PR1101MB214588230CD9820C8AAF3C298C670@BN6PR1101MB2145.namprd11.prod.outlook.com>
Date:   Wed, 8 Jul 2020 20:45:01 +0000
From:   "Bowers, AndrewX" <andrewx.bowers@...el.com>
To:     "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH net-next 4/4] i40e, xsk: move buffer
 allocation out of the Rx processing loop

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Björn Töpel
> Sent: Thursday, July 2, 2020 8:38 AM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; bpf@...r.kernel.org; Topel, Bjorn
> <bjorn.topel@...el.com>; Karlsson, Magnus <magnus.karlsson@...el.com>
> Subject: [Intel-wired-lan] [PATCH net-next 4/4] i40e, xsk: move buffer
> allocation out of the Rx processing loop
> 
> From: Björn Töpel <bjorn.topel@...el.com>
> 
> Instead of checking in each iteration of the Rx packet processing loop, move
> the allocation out of the loop and do it once for each napi activation.
> 
> For AF_XDP the rx_drop benchmark was improved by 6%.
> 
> Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_xsk.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers@...el.com>