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HAProxy - Load balancer
cfeca3a3a3
Instead of taking the update's write lock in stktable_touch_with_exp(), while most of the time under high load there is nothing to update because the entry is touched before having been synchronized present, let's do the check under a read lock and upgrade it to perform the update if needed. These updates are rare and the contention is not expected to be very high, so at the first failure to upgrade we retry directly with a write lock. By doing so the performance has almost doubled again, from 1140 to 2050k with a peers section enabled. The contention is now on taking the read lock itself, so there's little to be gained beyond this in this function. |
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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)