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49667c14ba
There's no point keeping the proxy lock held for a long time, it's only needed when checking the proxy's queue, and keeping it prevents multiple servers from dequeuing in parallel. Let's move it into pendconn_process_next_strm() and release it ASAP. The pendconn remains under the server queue lock's protection, guaranteeing that no stream will release it while it's being touched. For roundrobin, the performance increases by 76% (327k to 575k) on 16 threads. Even with a single server and maxconn=100, the performance increases from 398 to 496 kreq/s. For leastconn, almost no change is visible (less than one percent) but this is expected since most of the time there is spent in fwlc_reposition() and fwlc_get_next_server().
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)