c5052bad8a
Currently tasks being profiled have th_ctx->sched_call_date set to the current nanosecond in monotonic time. But there's no other way to have this, despite the scheduler being capable of it. Let's just declare a new task flag, TASK_F_WANTS_TIME, that makes the scheduler take the time just before calling the handler. This way, a task that needs nanosecond resolution on the call date will be able to be called with an up-to-date date without having to abuse now_mono_time() if not needed. In addition, if CLOCK_MONOTONIC is not supported (now_mono_time() always returns 0), the date is set to the most recently known now_ns, which is guaranteed to be atomic and is only updated once per poll loop. This date can be more conveniently retrieved using task_mono_time(). This can be useful, e.g. for pacing. The code was slightly adjusted so as to merge the common parts between the profiling case and this one.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
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)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.