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haproxy/doc/internals
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Willy Tarreau 40ad8a129c MEDIUM: task: add a new flag TASK_RT to permit a task to skip the priority queue 
For some very rare tasks that need to be woken up at an exact date (right
now the only known use case is haload's periodic stats collection), it's
currently difficult to guarantee the wake up date on a heavily loaded
run queue.

This patch introduces TASK_RT for real-time tasks. Right now, all it does
is modify __task_wakeup() to immediately switch to __tasklet_wakeup_*()
and effectively bypass the priority-based run queue. Doing it here has
the benefit of making sure that it automatically applies to tasks found
in the wait queue, and that it will also work for _task_drop_running().

For now nothing uses it. The doc was updated.
2026-06-24 19:08:00 +02:00
..
api MEDIUM: task: add a new flag TASK_RT to permit a task to skip the priority queue 2026-06-24 19:08:00 +02:00
acl.txt DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
body-parsing.txt DOC: Fix typos in different subsections of the documentation 2018-11-18 22:23:15 +01:00
connect-status.txt [BUG] fixed connection establishment detection 2007-04-30 14:37:43 +02:00
connection-header.txt DOC: Fix typos in different subsections of the documentation 2018-11-18 22:23:15 +01:00
connection-scale.txt [DOC] imported lots of internal documentations 2007-01-07 13:03:59 +01:00
core-principles.txt DOC: internals: clarify ambiguous wording in core-principles 2026-05-31 16:38:03 +02:00
fd-migration.txt CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
hashing.txt [RELEASE] Released version 2.4-dev19 2021-05-10 07:50:26 +02:00
list.fig [RELEASE] Released version 2.4-dev17 2021-04-23 19:11:10 +02:00
list.png CLEANUP: lists/tree-wide: rename some list operations to avoid some confusion 2021-04-21 09:20:17 +02:00
listener-states.fig [RELEASE] Released version 2.3-dev6 2020-10-10 10:45:13 +02:00
listener-states.png MEDIUM: listeners: remove the now unused ZOMBIE state 2020-10-09 11:27:29 +02:00
lua_socket.fig [RELEASE] Released version 1.8-dev3 2017-10-22 10:13:45 +02:00
lua_socket.pdf MEDIUM: xref/lua: Use xref for referencing cosocket relation between stream and lua 2017-09-11 18:59:40 +02:00
muxes.fig DOC: internal: update the muxes doc to mention the stconn 2022-05-27 19:33:35 +02:00
muxes.pdf DOC: internal: update the muxes doc to mention the stconn 2022-05-27 19:33:35 +02:00
muxes.png DOC: internal: update the muxes doc to mention the stconn 2022-05-27 19:33:35 +02:00
muxes.svg DOC: internal: update the muxes doc to mention the stconn 2022-05-27 19:33:35 +02:00
mworker.md DOC: internals: addd mworker V3 internals 2026-02-04 16:39:44 +01:00
notes-layers.txt DOC: assorted typo fixes in the documentation 2020-03-09 14:45:58 +01:00
notes-poll-connect.txt DOC: internal: commit notes about polling states and flags on connect() 2022-11-17 16:49:00 +01:00
notes-pollhup.txt DOC: internal: commit notes about polling states and flags 2022-11-17 16:49:00 +01:00
notes-polling.txt CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
pattern.dia DOC: pattern: pattern organisation schematics 2014-03-20 14:10:49 +01:00
pattern.pdf DOC: pattern: pattern organisation schematics 2014-03-20 14:10:49 +01:00
polling-states.fig [RELEASE] Released version 2.3-dev7 2020-10-17 10:31:50 +02:00
sched.fig [RELEASE] Released version 2.4-dev10 2021-02-26 22:49:10 +01:00
sched.pdf DOC: scheduler: add a diagram showing the different queues and their usages 2021-02-26 17:49:37 +01:00
sched.png DOC: scheduler: add a diagram showing the different queues and their usages 2021-02-26 17:49:37 +01:00
sched.svg DOC: scheduler: add a diagram showing the different queues and their usages 2021-02-26 17:49:37 +01:00
shm-stats-file-description.txt DOC: internals: document the shm-stats-file format/mapping 2025-09-17 11:32:58 +02:00
ssl_cert.dia DOC: internals: update the SSL architecture schema 2021-05-17 10:50:24 +02:00
stats-v2.txt [DOC] imported lots of internal documentations 2007-01-07 13:03:59 +01:00
stconn-close.txt DOC: internal: add a bit of documentation for the stconn closing conditions 2023-05-23 16:18:19 +02:00
stream-sock-states.fig [RELEASE] Released version 2.0-dev6 2019-06-07 06:12:59 +02:00
thread-exec-ctx.txt DOC: internals: short explanation on how thread_exec_ctx works 2026-03-12 18:28:09 +01:00
threat-model.txt DOC: internals: add a threat model definition 2026-05-31 20:28:08 +02:00
watchdog.txt DOC: watchdog: update the doc to reflect the recent changes 2025-05-21 11:34:55 +02:00