netdev - [PATCH net-next 0/7] net: aquantia: RX performance optimization patches

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Date:   Sat, 23 Mar 2019 15:23:29 +0000
From:   Igor Russkikh <Igor.Russkikh@...antia.com>
To:     "David S . Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Igor Russkikh <Igor.Russkikh@...antia.com>
Subject: [PATCH net-next 0/7] net: aquantia: RX performance optimization
 patches

Here is a set of patches targeting for performance improvement
on various platforms and protocols.

Our main target was rx performance on iommu systems, notably
NVIDIA Jetson TX2 and NVIDIA Xavier platforms.

We introduce page reuse strategy to better deal with iommu dma mapping costs.
With it we see 80-90% of page reuse under some test configurations on UDP traffic.

This shows good improvements on other systems with IOMMU hardware, like
AMD Ryzen.

We've also improved TCP LRO configuration parameters, allowing packets to better
coalesce.

Page reuse tests were carried out using iperf3, iperf2, netperf and pktgen.
Mainly on UDP traffic, with various packet lengths.

Jetson TX2, UDP, Default MTU:
RX Lost Datagrams
  Before: Max: 69%  Min: 68% Avg: 68.5%
  After:  Max: 41%  Min: 38% Avg: 39.2%
Maximum throughput
  Before: 1.27 Gbits/sec
  After:  2.41 Gbits/sec

AMD Ryzen 5 2400G, UDP, Default MTU:
RX Lost Datagrams
  Before:  Max: 12%  Min: 4.5% Avg: 7.17%
  After:   Max: 6.2% Min: 2.3% Avg: 4.26%

Igor Russkikh (6):
  net: aquantia: optimize rx path using larger preallocated skb len
  net: aquantia: optimize rx performance by page reuse strategy
  net: aquantia: Introduce rx refill threshold value
  net: aquantia: Make RX default frame size 2K
  net: aquantia: Increase rx ring default size from 1K to 2K
  net: aquantia: enable driver build for arm64 or compile_test

Nikita Danilov (1):
  net: aquantia: improve LRO configuration

 drivers/net/ethernet/aquantia/Kconfig         |   3 +-
 .../net/ethernet/aquantia/atlantic/aq_cfg.h   |  10 +-
 .../net/ethernet/aquantia/atlantic/aq_nic.c   |   1 +
 .../net/ethernet/aquantia/atlantic/aq_nic.h   |   1 +
 .../net/ethernet/aquantia/atlantic/aq_ring.c  | 187 +++++++++++++-----
 .../net/ethernet/aquantia/atlantic/aq_ring.h  |  34 +++-
 .../net/ethernet/aquantia/atlantic/aq_vec.c   |   3 +
 .../aquantia/atlantic/hw_atl/hw_atl_a0.c      |   4 -
 .../aquantia/atlantic/hw_atl/hw_atl_b0.c      |  16 +-
 .../atlantic/hw_atl/hw_atl_b0_internal.h      |   2 +-
 .../aquantia/atlantic/hw_atl/hw_atl_llh.c     |  15 ++
 .../aquantia/atlantic/hw_atl/hw_atl_llh.h     |   6 +
 .../atlantic/hw_atl/hw_atl_llh_internal.h     |  13 ++
 13 files changed, 223 insertions(+), 72 deletions(-)

-- 
2.17.1