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With thread groups and group-local masks, the update_mask cannot be touched nor even checked if it may change below us. In order to avoid this, we have to grab a reference to the FD's tgid before checking the update mask. The operations are cheap enough so that we don't notice it in performance tests. This is expected because the risk of meeting a reassigned FD during an update remains very low. It's worth noting that the tgid cannot be trusted during startup nor during soft-stop since that may come from anywhere at the moment. Since soft-stop runs under thread isolation we use that hint to decide whether or not to check that the FD's tgid matches the current one. The modification is applied to the 3 thread-aware pollers, i.e. epoll, kqueue, and evports. Also one poll_drop counter was missing for shared updates, though it might be hard to trigger it. With this change applied, thread groups are usable in benchmarks.
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)