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From: "Brown, Aaron F" <aaron.f.brown@intel.com>
To: "Björn Töpel" <bjorn.topel@gmail.com>,
"intel-wired-lan@lists.osuosl.org"
<intel-wired-lan@lists.osuosl.org>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
"Topel, Bjorn" <bjorn.topel@intel.com>,
"Karlsson, Magnus" <magnus.karlsson@intel.com>,
"kuba@kernel.org" <kuba@kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH net-next v2 1/3] i40e, xsk: remove HW descriptor prefetch in AF_XDP path
Date: Sat, 5 Sep 2020 02:58:18 +0000 [thread overview]
Message-ID: <DM6PR11MB2890634F51624FE7FCE50A60BC2A0@DM6PR11MB2890.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200825113556.18342-2-bjorn.topel@gmail.com>
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Björn Töpel
> Sent: Tuesday, August 25, 2020 4:36 AM
> To: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; bpf@vger.kernel.org; Topel, Bjorn
> <bjorn.topel@intel.com>; Karlsson, Magnus <magnus.karlsson@intel.com>;
> kuba@kernel.org
> Subject: [Intel-wired-lan] [PATCH net-next v2 1/3] i40e, xsk: remove HW
> descriptor prefetch in AF_XDP path
>
> From: Björn Töpel <bjorn.topel@intel.com>
>
> The software prefetching of HW descriptors has a negative impact on
> the performance. Therefore, it is now removed.
>
> Performance for the rx_drop benchmark increased with 2%.
>
> Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
> ---
> drivers/net/ethernet/intel/i40e/i40e_txrx.c | 13 +++++++++++++
> drivers/net/ethernet/intel/i40e/i40e_txrx_common.h | 13 -------------
> drivers/net/ethernet/intel/i40e/i40e_xsk.c | 12 ++++++++++++
> 3 files changed, 25 insertions(+), 13 deletions(-)
>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
next prev parent reply other threads:[~2020-09-05 2:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 11:35 [PATCH net-next v2 0/3] i40e driver performance tweaks for AF_XDP Björn Töpel
2020-08-25 11:35 ` [PATCH net-next v2 1/3] i40e, xsk: remove HW descriptor prefetch in AF_XDP path Björn Töpel
2020-09-05 2:58 ` Brown, Aaron F [this message]
2020-08-25 11:35 ` [PATCH net-next v2 2/3] i40e: use 16B HW descriptors instead of 32B Björn Töpel
2020-09-05 3:01 ` [Intel-wired-lan] " Brown, Aaron F
2020-08-25 11:35 ` [PATCH net-next v2 3/3] i40e, xsk: move buffer allocation out of the Rx processing loop Björn Töpel
2020-09-05 3:03 ` [Intel-wired-lan] " Brown, Aaron F
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