On Wed, 26 Jun 2019 at 16:36, Tariq Toukan <tariqt@xxxxxxxxxxxx> 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@xxxxxxxxx> > > 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 >
