From: Andy Gospodarek <go...@broadcom.com> This RFC converts the adaptive interrupt moderation library from the mlx5_en driver into a library so it can be used by any driver. The last patch in this set adds support for interrupt moderation in the bnxt_en driver.
The main purpose of this code in the mlx5_en driver is to allow an administrator to make sure that default coalesce settings are optimized for low latency, but quickly adapt to handle high throughput traffic and optimize how many packets are received during each napi poll. For any new driver the following changes would be needed to use this library: - add elements in ring struct to track items needed by this library - create function that can be called to actually set coalesce settings for the driver My main reason for making this an RFC is that I would like verification from Mellanox that the performance of their driver does not change in a unintended way. I did some basic testing (netperf) and did not note a statistically significant change in throughput or CPU utilization before and after this set. Credit to Rob Rice and Lee Reed for doing some of the initial proof of concept and testing for this patch. Andy Gospodarek (9): mlx5_en: move interrupt moderation structs to new file mlx5_en: move interrupt moderation forward delcarations mlx5_en: remove rq references in mlx5e_rx_am mlx5_en: move AM logic enums mlx5_en: move generic functions to new file mlx5_en: rename en_rx_am.h to net_rx_am.h mlx5_en: remove Mellanox references in AM code net: move adaptive interrpt coalescing code to lib/ bnxt_en: add support for software adaptive interrupt moderation drivers/net/ethernet/broadcom/bnxt/Makefile | 2 +- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 51 ++++ drivers/net/ethernet/broadcom/bnxt/bnxt.h | 34 ++- drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 7 + drivers/net/ethernet/broadcom/bnxt/bnxt_rx_am.c | 32 +++ drivers/net/ethernet/mellanox/mlx5/core/en.h | 43 +-- .../net/ethernet/mellanox/mlx5/core/en_ethtool.c | 6 +- drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 18 +- drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 4 +- drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c | 298 +------------------- drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c | 5 +- include/linux/mlx5/mlx5_ifc.h | 6 - include/linux/net_rx_am.h | 109 ++++++++ lib/Makefile | 2 +- lib/net_rx_am.c | 306 +++++++++++++++++++++ 15 files changed, 558 insertions(+), 365 deletions(-) create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_rx_am.c create mode 100644 include/linux/net_rx_am.h create mode 100644 lib/net_rx_am.c -- 2.7.4
