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99198546f6
The x86-tso model makes the load and store barriers unneeded for our usage as long as they perform at least a compiler barrier: the CPU will respect store ordering and store vs load ordering. It's thus safe to remove the lfence and sfence which are normally needed only to communicate with external devices. Let's keep the mfence though, to make sure that reads of same memory location after writes report the value from memory and not the one snooped from the write buffer for too long. An in-depth review of all use cases tends to indicate that this is okay in the rest of the code. Some parts could be cleaned up to use atomic stores and atomic loads instead of explicit barriers though. Doing this reliably increases the overall performance by about 2-2.5% on a 8c-16t Xeon thanks to less frequent flushes (it's likely that the biggest gain is in the MT lists which use them a lot, and that this results in less cache line flushes). |
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| addons | ||
| admin | ||
| dev | ||
| doc | ||
| examples | ||
| include | ||
| reg-tests | ||
| scripts | ||
| src | ||
| tests | ||
| .cirrus.yml | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| BRANCHES | ||
| CHANGELOG | ||
| CONTRIBUTING | ||
| INSTALL | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
| ROADMAP | ||
| SUBVERS | ||
| VERDATE | ||
| VERSION | ||
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)