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Date: Wed, 26 Jun 2019 18:29:14 +0200
From: Björn Töpel <bjorn.topel@...il.com>
To: Tariq Toukan <tariqt@...lanox.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Björn Töpel <bjorn.topel@...el.com>,
Magnus Karlsson <magnus.karlsson@...el.com>,
"bpf@...r.kernel.org" <bpf@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Jonathan Lemon <bsd@...com>,
"David S. Miller" <davem@...emloft.net>,
Maxim Mikityanskiy <maximmi@...lanox.com>
Subject: Re: [PATCH bpf-next V6 00/16] AF_XDP infrastructure improvements and
mlx5e support
On Wed, 26 Jun 2019 at 16:36, Tariq Toukan <tariqt@...lanox.com> wrote:
>
> This series contains improvements to the AF_XDP kernel infrastructure
> and AF_XDP support in mlx5e. The infrastructure improvements are
> required for mlx5e, but also some of them benefit to all drivers, and
> some can be useful for other drivers that want to implement AF_XDP.
>
> The performance testing was performed on a machine with the following
> configuration:
>
> - 24 cores of Intel Xeon E5-2620 v3 @ 2.40 GHz
> - Mellanox ConnectX-5 Ex with 100 Gbit/s link
>
> The results with retpoline disabled, single stream:
>
> txonly: 33.3 Mpps (21.5 Mpps with queue and app pinned to the same CPU)
> rxdrop: 12.2 Mpps
> l2fwd: 9.4 Mpps
>
> The results with retpoline enabled, single stream:
>
> txonly: 21.3 Mpps (14.1 Mpps with queue and app pinned to the same CPU)
> rxdrop: 9.9 Mpps
> l2fwd: 6.8 Mpps
>
> v2 changes:
>
> Added patches for mlx5e and addressed the comments for v1. Rebased for
> bpf-next.
>
> v3 changes:
>
> Rebased for the newer bpf-next, resolved conflicts in libbpf. Addressed
> Björn's comments for coding style. Fixed a bug in error handling flow in
> mlx5e_open_xsk.
>
> v4 changes:
>
> UAPI is not changed, XSK RX queues are exposed to the kernel. The lower
> half of the available amount of RX queues are regular queues, and the
> upper half are XSK RX queues. The patch "xsk: Extend channels to support
> combined XSK/non-XSK traffic" was dropped. The final patch was reworked
> accordingly.
>
> Added "net/mlx5e: Attach/detach XDP program safely", as the changes
> introduced in the XSK patch base on the stuff from this one.
>
> Added "libbpf: Support drivers with non-combined channels", which aligns
> the condition in libbpf with the condition in the kernel.
>
> Rebased over the newer bpf-next.
>
> v5 changes:
>
> In v4, ethtool reports the number of channels as 'combined' and the
> number of XSK RX queues as 'rx' for mlx5e. It was changed, so that 'rx'
> is 0, and 'combined' reports the double amount of channels if there is
> an active UMEM - to make libbpf happy.
>
> The patch for libbpf was dropped. Although it's still useful and fixes
> things, it raises some disagreement, so I'm dropping it - it's no longer
> useful for mlx5e anymore after the change above.
>
> v6 changes:
>
> As Maxim is out of office, I rebased the series on behalf of him,
> solved some conflicts, and re-spinned.
>
> Series generated against bpf-next commit:
> 572a6928f9e3 xdp: Make __mem_id_disconnect static
>
Thanks Tariq, re-adding my ack for the series.
Acked-by: Björn Töpel <bjorn.topel@...el.com>
>
> Maxim Mikityanskiy (16):
> net/mlx5e: Attach/detach XDP program safely
> xsk: Add API to check for available entries in FQ
> xsk: Add getsockopt XDP_OPTIONS
> libbpf: Support getsockopt XDP_OPTIONS
> xsk: Change the default frame size to 4096 and allow controlling it
> xsk: Return the whole xdp_desc from xsk_umem_consume_tx
> net/mlx5e: Replace deprecated PCI_DMA_TODEVICE
> net/mlx5e: Calculate linear RX frag size considering XSK
> net/mlx5e: Allow ICO SQ to be used by multiple RQs
> net/mlx5e: Refactor struct mlx5e_xdp_info
> net/mlx5e: Share the XDP SQ for XDP_TX between RQs
> net/mlx5e: XDP_TX from UMEM support
> net/mlx5e: Consider XSK in XDP MTU limit calculation
> net/mlx5e: Encapsulate open/close queues into a function
> net/mlx5e: Move queue param structs to en/params.h
> net/mlx5e: Add XSK zero-copy support
>
> drivers/net/ethernet/intel/i40e/i40e_xsk.c | 12 +-
> drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 15 +-
> drivers/net/ethernet/mellanox/mlx5/core/Makefile | 2 +-
> drivers/net/ethernet/mellanox/mlx5/core/en.h | 155 ++++-
> .../net/ethernet/mellanox/mlx5/core/en/params.c | 108 +--
> .../net/ethernet/mellanox/mlx5/core/en/params.h | 118 +++-
> drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c | 231 +++++--
> drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h | 36 +-
> .../ethernet/mellanox/mlx5/core/en/xsk/Makefile | 1 +
> .../net/ethernet/mellanox/mlx5/core/en/xsk/rx.c | 192 ++++++
> .../net/ethernet/mellanox/mlx5/core/en/xsk/rx.h | 27 +
> .../net/ethernet/mellanox/mlx5/core/en/xsk/setup.c | 223 +++++++
> .../net/ethernet/mellanox/mlx5/core/en/xsk/setup.h | 25 +
> .../net/ethernet/mellanox/mlx5/core/en/xsk/tx.c | 111 ++++
> .../net/ethernet/mellanox/mlx5/core/en/xsk/tx.h | 15 +
> .../net/ethernet/mellanox/mlx5/core/en/xsk/umem.c | 267 ++++++++
> .../net/ethernet/mellanox/mlx5/core/en/xsk/umem.h | 31 +
> .../net/ethernet/mellanox/mlx5/core/en_ethtool.c | 25 +-
> .../ethernet/mellanox/mlx5/core/en_fs_ethtool.c | 18 +-
> drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 730 +++++++++++++--------
> drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 12 +-
> drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 104 ++-
> drivers/net/ethernet/mellanox/mlx5/core/en_stats.c | 115 +++-
> drivers/net/ethernet/mellanox/mlx5/core/en_stats.h | 30 +
> drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c | 42 +-
> .../net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c | 14 +-
> drivers/net/ethernet/mellanox/mlx5/core/wq.h | 5 -
> include/net/xdp_sock.h | 27 +-
> include/uapi/linux/if_xdp.h | 8 +
> net/xdp/xsk.c | 36 +-
> net/xdp/xsk_queue.h | 14 +
> samples/bpf/xdpsock_user.c | 44 +-
> tools/include/uapi/linux/if_xdp.h | 8 +
> tools/lib/bpf/xsk.c | 12 +
> tools/lib/bpf/xsk.h | 2 +-
> 35 files changed, 2331 insertions(+), 484 deletions(-)
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/Makefile
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.c
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/rx.h
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.h
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/tx.c
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/tx.h
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.c
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.h
>
> --
> 1.8.3.1
>
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