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When a tasklet re-runs itself such as in this chain: si_cs_io_cb -> si_cs_process -> si_notify -> si_chk_rcv then we know it can easily clobber the run queue and harm latency. Now what the scheduler does when it detects this is that such a tasklet is automatically placed into the bulk list so that it's processed with the remaining CPU bandwidth only. Thanks to this the CLI becomes instantly responsive again even under heavy stress at 50 Gbps over 40kcon and 100% CPU on 16 threads.
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)