From: Björn Töpel <bjorn.to...@intel.com> This patch set introduces zero-copy AF_XDP support for Intel's ixgbe driver.
The ixgbe zero-copy code is located in its own file ixgbe_xsk.[ch], analogous to the i40e ZC support. Again, as in i40e, code paths have been copied from the XDP path to the zero-copy path. Going forward we will try to generalize more code between the AF_XDP ZC drivers, and also reduce the heavy C&P. We have run some benchmarks on a dual socket system with two Broadwell E5 2660 @ 2.0 GHz with hyperthreading turned off. Each socket has 14 cores which gives a total of 28, but only two cores are used in these experiments. One for TR/RX and one for the user space application. The memory is DDR4 @ 2133 MT/s (1067 MHz) and the size of each DIMM is 8192MB and with 8 of those DIMMs in the system we have 64 GB of total memory. The compiler used is GCC 7.3.0. The NIC is Intel 82599ES/X520-2 10Gbit/s using the ixgbe driver. Below are the results in Mpps of the 82599ES/X520-2 NIC benchmark runs for 64B and 1500B packets, generated by a commercial packet generator HW blasting packets at full 10Gbit/s line rate. The results are with retpoline and all other spectre and meltdown fixes. AF_XDP performance 64B packets: Benchmark XDP_DRV with zerocopy rxdrop 14.7 txpush 14.6 l2fwd 11.1 AF_XDP performance 1500B packets: Benchmark XDP_DRV with zerocopy rxdrop 0.8 l2fwd 0.8 XDP performance on our system as a base line. 64B packets: XDP stats CPU Mpps issue-pps XDP-RX CPU 16 14.7 0 1500B packets: XDP stats CPU Mpps issue-pps XDP-RX CPU 16 0.8 0 The structure of the patch set is as follows: Patch 1: Introduce Rx/Tx ring enable/disable functionality Patch 2: Preparatory patche to ixgbe driver code for RX Patch 3: ixgbe zero-copy support for RX Patch 4: Preparatory patch to ixgbe driver code for TX Patch 5: ixgbe zero-copy support for TX Cheers! Björn Björn Töpel (5): ixgbe: added Rx/Tx ring disable/enable functions ixgbe: move common Rx functions to ixgbe_txrx_common.h ixgbe: add AF_XDP zero-copy Rx support ixgbe: move common Tx functions to ixgbe_txrx_common.h ixgbe: add AF_XDP zero-copy Tx support drivers/net/ethernet/intel/ixgbe/Makefile | 3 +- drivers/net/ethernet/intel/ixgbe/ixgbe.h | 27 +- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 290 ++++++- .../ethernet/intel/ixgbe/ixgbe_txrx_common.h | 50 ++ drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 814 ++++++++++++++++++ 5 files changed, 1139 insertions(+), 45 deletions(-) create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c -- 2.17.1
