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That's the same principle as for ->allocated. The small difference here is that it's no longer possible to decrement ->used in batches when releasing clusters from the cache to the shared cache, so the counter has to be decremented for each of them. But as it provides less contention and it's done only during forced eviction, it shouldn't be a problem. A function "pool_used()" was added to return the sum of the entries. It's used by pool_alloc_nocache() and pool_free_nocache() which need to count the number of used entries. It's not a problem since such operations are done when picking/releasing objects to/from the OS, but it is a reminder that the number of buckets should remain small. With this change, an h2load test made of 5 * 160 conn * 40 streams on 80 threads raised from 812k RPS to 1.5M 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)