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.. _performance:
Performance
===========
Overview
^^^^^^^^
One of the benefits of FD.io VPP, is high performance on relatively low-power computing, this performance is based on the following features:
* A high-performance user-space network stack designed for commodity hardware.
- L2, L3 and L4 features and encapsulations.
* Optimized packet interfaces supporting a multitude of use cases.
- An integrated vhost-user backend for high speed VM-to-VM connectivity.
- An integrated memif container backend for high speed Container-to-Container connectivity.
- An integrated vhost based interface to punt packets to the Linux Kernel.
* The same optimized code-paths run execute on the host, and inside VMs and Linux containers.
* Leverages best-of-breed open source driver technology: `DPDK <https://www.dpdk.org/>`_.
* Tested at scale; linear core scaling, tested with millions of flows and mac addresses.
These features have been designed to take full advantage of common micro-processor optimization techniques, such as:
* Reducing cache and TLS misses by processing packets in vectors.
* Realizing `IPC <https://en.wikipedia.org/wiki/Instructions_per_cycle>`_ gains with vector instructions such as: SSE, AVX and NEON.
* Eliminating mode switching, context switches and blocking, to always be doing useful work.
* Cache-lined aliged buffers for cache and memory efficiency.
Packet Throughput Graphs
^^^^^^^^^^^^^^^^^^^^^^^^
These are some of the packet throughput graphs for FD.io VPP 18.04 from the CSIT `18.04 benchmarking report <https://docs.fd.io/csit/rls1804/report/>`_.
.. toctree::
current_l2_throughput.rst
current_ndr_throughput.rst
current_ipv4_throughput.rst
current_ipv6_throughput.rst
Trending Throughput Graphs
^^^^^^^^^^^^^^^^^^^^^^^^^^
These are some of the trending packet throughput graphs from the CSIT `trending dashboard <https://docs.fd.io/csit/master/trending/introduction/index.html>`_. **Please note that**, performance in the trending graphs will change on a nightly basis in line with the software development cycle.
.. toctree::
trending_l2_throughput.rst
trending_ipv4_throughput.rst
trending_ipv6_throughput.rst
For More information on CSIT
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
These are FD.io Continuous System Integration and Testing (CSIT)'s documentation links.
* `CSIT Code Documentation <https://docs.fd.io/csit/master/doc/overview.html>`_
* `CSIT Test Overview <https://docs.fd.io/csit/rls1804/report/introduction/overview.html>`_
* `VPP Performance Dashboard <https://docs.fd.io/csit/master/trending/introduction/index.html>`_
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