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At plenty of places we decrement ts->ref_cnt under the write lock because it's held. We don't technically need it to be done that way if there's contention and an atomic could suffice. However until all places are turned to atomic, we at least need to do that under a read lock for now, so that we don't mix atomic and non-atomic uses. Regardless it already brings ~1.5% req rate improvement with 3 trackers on the same table under 48 threads at 184k->187k rps.
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)