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TID encoding in CID was removed by a recent change. It is now possible to access to the <tid> member stored in quic_connection_id instance. For unknown CID, a quick solution was to redispatch to the thread corresponding to the first CID byte. This ensures that an identical CID will always be handled by the same thread to avoid creating multiple same connection. However, this forces an uneven load repartition which can be critical for QUIC handshake operation. To improve this, remove the above constraint. An unknown CID is now handled by its receiving thread. However, this means that if multiple packets are received with the same unknown CID, several threads will try to allocate the same connection. To prevent this race condition, CID insertion in global tree is now conducted first before creating the connection. This is a thread-safe operation which can only be executed by a single thread. The thread which have inserted the CID will then proceed to quic_conn allocation. Other threads won't be able to insert the same CID : this will stop the treatment of the current packet which is redispatch to the now owning thread. This should be backported up to 2.7 after a period of observation.
The HAProxy documentation has been split into a number of different files for ease of use. 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)