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This patch is the first of two to reimplement flow control emission limits check. The objective is to account flow control earlier during snd_buf stream callback. This should smooth transfers and prevent over buffering on haproxy side if flow control limit is reached. The current patch deals with stream level flow control. It reuses the newly defined flow control type. Soft offset is incremented after HTX to data conversion. If limit is reached, snd_buf is interrupted and stream layer will subscribe on QCS. On qcc_io_cb(), generation of STREAM frames is restricted as previously to ensure to never surpass peer limits. Finally, flow control real offset is incremented on lower layer send notification. Thus, it will serve as a base offset for built STREAM frames. If limit is reached, STREAM frames generation is suspended. Each time QCS data flow control limit is reached, soft and real offsets are reconsidered. Finally, special care is used when flow control limit is incremented via MAX_STREAM_DATA reception. If soft value is unblocked, stream layer snd_buf is woken up. If real value is unblocked, qcc_io_cb() is rescheduled. |
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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)