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Igor Russkikh says: ==================== 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% ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.