HAProxy - Load balancer
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Willy Tarreau a7b2353cb3 MINOR: activity: support setting/clearing lock/memory watching for task profiling
Damien Claisse reported in issue #3257 a performance regression between
3.2 and 3.3 when task profiling is enabled, more precisely in relation
with the following patches were merged:

  98cc815e3e ("MINOR: activity: collect time spent with a lock held for each task")
  503084643f ("MINOR: activity: collect time spent waiting on a lock for each task")
  9d8c2a888b ("MINOR: activity: collect CPU time spent on memory allocations for each task")

The issue mostly comes from the first patches. What happens is that the
local time is taken when entering and leaving each lock, which costs a
lot on a contended system. The problem here is the lack of finegrained
settings for lock and malloc profiling.

This patch introduces a better approach. The task profiler goes back to
its default behavior in on/auto modes, but the configuration now accepts
new extra options "lock", "no-lock", "memory", "no-memory" to precisely
indicate other timers to watch for each task when profiling turns on.

This is achieved by setting two new flags HA_PROF_TASKS_LOCK and
HA_PROF_TASKS_MEM in the global "profiling" variable.

This patch only parses the new values and assigns them to the global
variable from the config file for now. The doc was updated.
2026-02-10 17:47:02 +01:00
.github CI: github: fix vtest.yml with "not quictls" 2026-01-19 13:22:10 +01:00
addons BUG/MINOR: promex: Detach promex from the server on error dump its metrics dump 2026-01-23 11:40:54 +01:00
admin MEDIUM: systemd: implement directory loading 2026-01-16 09:55:33 +01:00
dev CLEANUP: use the automatic alignment feature 2025-12-09 17:14:58 +01:00
doc MINOR: activity: support setting/clearing lock/memory watching for task profiling 2026-02-10 17:47:02 +01:00
examples MINOR: mailers: warn if mailers are configured but not actually used 2025-06-27 16:41:18 +02:00
include MINOR: activity: support setting/clearing lock/memory watching for task profiling 2026-02-10 17:47:02 +01:00
reg-tests REGTESTS: add dynamic backend creation test 2026-02-06 17:28:27 +01:00
scripts SCRIPTS: build: enable symbols in AWS-LC builds 2026-01-22 15:25:24 +01:00
src MINOR: activity: support setting/clearing lock/memory watching for task profiling 2026-02-10 17:47:02 +01:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES DOC: clarify the experimental status for certain features 2025-10-17 18:41:13 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev4 2026-02-04 14:59:47 +01:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL MINOR: version: mention that it's development again 2025-11-26 16:11:47 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile REORG: cfgparse: move peers parsing to cfgparse-peers.c 2026-01-20 17:17:37 +01:00
README.md DOC: change the link to the FreeBSD CI in README.md 2024-06-03 15:21:29 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev4 2026-02-04 14:59:47 +01:00
VERSION [RELEASE] Released version 3.4-dev4 2026-02-04 14:59:47 +01:00

HAProxy

alpine/musl AWS-LC openssl no-deprecated Illumos NetBSD FreeBSD VTest

HAProxy logo

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:

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.