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 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 ne 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.
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
