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0d6c75d749
It's amazing that the value was still incremented under the date lock, let's first use an atomic increment for the counter and move it out of the date lock to reduce contention. These are just counters, we don't need to take locks if we're not rotating, atomic ops are enough. This patch does this, and leaves the lock for when the period is over. It's important to note that some values might be added just before or just after a rotation but this is not a problem since we don't care if a value is counted in the previous or next period when it's exactly on the edge. Great care was taken to ensure that the current counter is always atomically updated. Other minor cleanups were performed, such as avoiding to reload the value from memory after a CAS, or using &~1 instead of two shifts to remove the lowest bit.
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 - 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)