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HAProxy - Load balancer
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Willy Tarreau 04f1e3f3d9 MINOR: ring: don't take the readers lock if there are no readers 
There's no point looking for freshly attached readers if there are none,
taking this lock requires an atomic write to a shared area, something we
clearly want to avoid.

A general test with 213-byte messages on different thread counts shows
how the performance degrades across CCX and how this patch improves the
situation:
                   Before          After
    3C6T/1CCX:    6.39 Mmsg/s     6.35 Mmsg/s
   6C12T/2CCX:    2.90 Mmsg/s     3.16 Mmsg/s
  12C24T/4CCX:    2.14 Mmsg/s     2.33 Mmsg/s
  24C48T/8CCX:    1.75 Mmsg/s     1.92 Mmsg/s

This tends to confirm that the queues will really be needed and that
they'll have to be per-ccx hence per thread-group. They will amortize
the number of updates on head & tail (one per multiple messages).
2024-03-25 17:34:19 +00:00
.github CI: temporarily adjust kernel entropy to work with ASAN/clang 2024-03-18 19:54:33 +01:00
addons CLEANUP: assorted typo fixes in the code and comments 2024-03-05 11:50:34 +01:00
admin BUILD: address a few remaining calloc(size, n) cases 2024-02-10 11:37:27 +01:00
dev MEDIUM: ring: use the topmost bit of the tail as a lock 2024-03-25 17:34:19 +00:00
doc MINOR: ssl: Change level of ocsp-update logs 2024-03-20 16:12:11 +01:00
examples CLEANUP: assorted typo fixes in the code and comments 2023-11-23 16:23:14 +01:00
include MEDIUM: ring: use the topmost bit of the tail as a lock 2024-03-25 17:34:19 +00:00
reg-tests OPTIM: http_ext: avoid useless copy in http_7239_extract_{ipv4,ipv6} 2024-03-25 16:24:15 +01:00
scripts CI: ssl: add yet another OpenSSL download fallback 2024-02-07 11:05:45 +01:00
src MINOR: ring: don't take the readers lock if there are no readers 2024-03-25 17:34:19 +00:00
tests Revert "MAJOR: import: update mt_list to support exponential back-off" 2023-09-15 17:13:43 +02:00
.cirrus.yml CI: cirrus-ci: display gdb bt if any 2023-09-22 08:28:30 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore CONTRIB: Add vi file extensions to .gitignore 2023-06-02 18:14:34 +02:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml CI: travis-ci: temporarily disable arm64 builds 2021-08-07 07:28:15 +02:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.0-dev5 2024-03-09 16:50:15 +01:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
INSTALL DOC: install: recommend pcre2 2024-02-08 08:55:57 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Deprecate the SPOE filter 2024-03-15 11:29:39 +01:00
Makefile REORG: dns/ring: split the ring between the generic one and the DNS one 2024-03-25 17:34:19 +00:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.0-dev5 2024-03-09 16:50:15 +01:00
VERSION [RELEASE] Released version 3.0-dev5 2024-03-09 16:50:15 +01:00

README 

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)