cb91ccd8a8
Major improvements have been introduced in pacing recently. Most notably, QMUX schedules emission on a millisecond resolution, which allow to use passive wait to be much CPU friendly. However, an issue remains with the pacing max credit. Unless BBR is used, it is fixed to the configured value from quic-cc-algo bind statement. This is not practical as if too low, it may drastically reduce performance due to 1ms sleep resolution. If too high, some clients will suffer from too much packet loss. This commit fixes the issue by implementing a dynamic maximum credit value based on the network condition specific to each clients. Calculation is done to fix a maximum value which should allow QMUX current tasklet context to emit enough data to cover the delay with the next tasklet invokation. As such, avg_loop_us is used to detect the process load. If too small, 1.5ms is used as minimal value, to cover the extra delay incurred by the system which will happen for a default 1ms sleep. This should be backported up to 3.1.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.