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ananicy-cpp (1.1.1-1rakuos2) UNRELEASED; urgency=medium
* Initial RakuOS packaging.
-- Tohur <tohur@tohur.xyz> Thu, 13 Nov 2025 05:27:02 -0700

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Source: ananicy-cpp
Section: admin
Priority: optional
Maintainer: Tohur <tohur@rakuos.org>
Build-Depends: debhelper-compat (= 13),
cmake,
ninja-build,
g++,
pkg-config,
clang,
libbpf-dev,
libelf-dev,
libfmt-dev,
libspdlog-dev,
nlohmann-json3-dev,
systemd-dev,
zlib1g-dev
Standards-Version: 4.6.2
Homepage: https://gitlab.com/ananicy-cpp/ananicy-cpp
Rules-Requires-Root: no
Package: ananicy-cpp
Architecture: any
Depends: ${misc:Depends}, ${shlibs:Depends}
Description: Ananicy Cpp - automatic process optimizer rewritten in C++
Ananicy Cpp is a full rewrite of Ananicy in C++, featuring lower CPU and RAM usage.
It automatically adjusts process priorities, CPU affinities, and I/O classes
based on configuration rules to optimize system responsiveness.

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Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ananicy-cpp
Source: https://gitlab.com/ananicy-cpp/ananicy-cpp
License: GPL-3+
License-Filename: COPYING
Files: *
Copyright: 2020-2025 the ananicy-cpp authors

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etc/* etc/
usr/* usr/

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#!/bin/sh
set -e
systemctl enable ananicy-cpp.service

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#!/usr/bin/make -f
# Simple dh (debhelper) build rules file
%:
dh $@
override_dh_fixperms:
dh_fixperms
chmod 755 debian/ananicy-cpp/usr/bin/ananicy-cpp
chmod u+x debian/ananicy-cpp/usr/bin/ananicy-cpp

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3.0 (quilt)

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# Cgroups definitions
# Currently very simple, only for group CPU intensive tasks
# cpuquota same as systemd CPUQuota,
# only difference is - meaning of N% is all CPUs, not one core.
{ "cgroup": "cpu90", "CPUQuota": 90 }
{ "cgroup": "cpu85", "CPUQuota": 85 }
{ "cgroup": "cpu80", "CPUQuota": 80 }

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# Type: Game
# Use more CPU time if possible
# Games do not always need more IO, but in most cases can be hungry for CPU
{ "type": "Game", "nice": -5, "ioclass": "best-effort", "latency_nice": -5 }
# Type: Player Audio/Video
# Try to add more CPU power to decrease latency/lags
# Try to add real time io for avoiding lags
{ "type": "Player-Audio", "nice": -4, "latency_nice": -4 }
{ "type": "Player-Video", "nice": -4, "latency_nice": -4 }
# Must have more CPU/IO time, but not so much as other apps
{ "type": "Image-View", "nice": -4, "latency_nice": -4 }
{ "type": "Doc-View", "nice": -4, "latency_nice": -4 }
# Type: Low Latency Realtime Apps
# In general case not so heavy, but must not lag
{ "type": "LowLatency_RT", "nice": -12, "ioclass": "best-effort", "latency_nice": -9 }
# Type: BackGround CPU/IO Load
# Background CPU/IO it's needed, but it must be as silent as possible
{ "type": "BG_CPUIO", "nice": 16, "ioclass": "idle", "sched": "idle", "latency_nice": 11 }
# Type: Heavy CPU Load
# It must work fast enough but must not create so much noise
{ "type": "Heavy_CPU", "nice": 9, "ioclass": "best-effort", "ionice": 7, "latency_nice": 9 }
# Type: Chat
{ "type": "Chat", "nice": -3, "ioclass": "best-effort", "ionice": 7 , "latency_nice": -3 }
# Type: Service
{ "type": "Service", "nice": 10, "ioclass": "best-effort", "ionice": 6 , "latency_nice": 10 }
# Type: Indifference
{ "type": "IN_DIFF", "nice": 0, "ioclass": "best-effort", "ionice": 7 , "latency_nice": 0 }
# Type: Adj OOM Score
{ "type": "OOM_KILL", "oom_score_adj": 1000 }
{ "type": "OOM_NO_KILL", "oom_score_adj": -1000 }

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## Ananicy 2.X configuration
# Ananicy run full system scan every "check_freq" seconds
# supported values 0.01..86400
# values which have sense: 1..60
check_freq = 15
# Disables functionality
cgroup_load = true
type_load = true
rule_load = true
apply_nice = true
apply_latnice = true
apply_ionice = true
apply_sched = true
apply_oom_score_adj = true
apply_cgroup = true
# Loglevel
# supported values: trace, debug, info, warn, error, critical
loglevel = info
# If enabled it does log task name after rule matched and got applied to the task
log_applied_rule = false
# It tries to move realtime task to root cgroup to be able to move it to the ananicy-cpp controlled one
# NOTE: may introduce issues, for example with polkit
cgroup_realtime_workaround = false

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../../../../usr/bin/ananicy-cpp

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[Unit]
Description=Ananicy-Cpp - ANother Auto NICe daemon in C++
After=local-fs.target
StartLimitIntervalSec=0
StartLimitBurst=10
[Service]
Type=simple
ExecStart=/usr/bin/ananicy-cpp start
ExecReload=/usr/bin/ananicy-cpp --reload
Nice=-5
SuccessExitStatus=143
OOMScoreAdjust=-999
Restart=always
RestartSec=10
CPUAccounting=true
MemoryHigh=16M
MemoryMax=64M
# Hardening
ProtectSystem=true
ProtectHome=true
PrivateTmp=yes
PrivateDevices=true
ProtectClock=true
ProtectKernelLogs=true
ProtectKernelModules=true
ProtectKernelTunables=true
CapabilityBoundingSet=~CAP_SYS_PTRACE CAP_CHOWN CAP_FSETID CAP_SETFCAP CAP_SETUID CAP_SETGID CAP_SETPCAP
ProcSubset=pid
RestrictAddressFamilies=AF_UNIX AF_NETLINK
NoNewPrivileges=true
RestrictSUIDSGID=true
RestrictNamespaces=cgroup
ProtectHostname=true
LockPersonality=true
MemoryDenyWriteExecute=true
# Filter system calls to those absolutely requrired for correct functioning.
#SystemCallErrorNumber=EPERM
#SystemCallFilter=@system-service
#SystemCallFilter=~@debug @module @mount @reboot @swap @clock @obsolete @cpu-emulation
# Required to see other processes
PrivateUsers=false
ProtectProc=default
# Required for the process-listener socket to work
PrivateNetwork=false
# Required for control groups (obviously)
ProtectControlGroups=false
# Required for future use.
RestrictRealtime=false
[Install]
WantedBy=local-fs.target

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![Ananicy Cpp Logo](./assets/ananicy_logo.svg)
# Ananicy Cpp
[Ananicy](https://github.com/Nefelim4ag/Ananicy) rewritten in C++ for much lower CPU and memory usage.
_Beta status_
[![Packaging status](https://repology.org/badge/vertical-allrepos/ananicy-cpp.svg)](https://repology.org/project/ananicy-cpp/versions)
## What works
- [X] Rule and configuration loading
- [X] Process detection and scanning
- [X] Renicing
- [X] Changing CPU scheduler
- [X] Changing IO class and IO nice
- [X] Setting OOM score
- [X] Change default configuration file and rules directory using environment variables (`ANANICY_CPP_{CONF,CONFDIR}`)
- [X] Cgroups
- [X] V1
- [X] V2 (_Limited support, see #21_)
- [X] Autogroup
- [X] Systemd integration
- [X] Unit file
- [X] Hardening unit file
- [X] Working sd_notify
- [X] CLI compatibility with Ananicy
- [ ] Something else... ?
## Installation
#### Dependencies
- [CMake](https://cmake.org/download/) 3.17+
- [fmtlib](https://github.com/fmtlib/fmt) 8.0+ _(can be automatically downloaded)_
- [spdlog](https://github.com/gabime/spdlog) 1.9+ _(can be automatically downloaded)_
- [nlohmann_json](https://github.com/nlohmann/json) 3.9+ _(can be automatically downloaded)_
- C++ compiler compatible with C++20 (`g++ >= 10` or `clang++ >= 10`).
Notably, `<concepts>` and `std::jthread` are required. Work is in progress to add support to `g++ ~= 9`, see https://gitlab.com/ananicy-cpp/ananicy-cpp/-/issues/28 for more info.
- _Optional_:
- libsystemd (if you want systemd support)
- [bpf](https://www.kernel.org) _(required for bpf implementation)_
- [libbpf](https://github.com/libbpf/libbpf) _(required for bpf implementation)_
- [libelf](https://sourceware.org/elfutils/) _(required for bpf implementation)_
- [clang](https://clang.llvm.org/) clang++ >= 10 _(required for bpf implementation)_
#### Debian/Ubuntu
Install the prerequisites: `sudo apt install git cmake build-essential g++ libsystemd-dev`
### Linux
It should be a fully drop-in replacement from Ananicy.
If you detect a difference in behavior (except for bugs in Ananicy that are fixed in `ananicy-cpp`),
please create an issue.
If you want pre-made community rules, you can use the rules from the original Ananicy project.
Simply copy them to your rules directory (by default, `/etc/ananicy.d`).
#### Available CMake options
- `CMAKE_BUILD_TYPE:STRING`: Either `None` (default), `Release`, or `Debug`.
The effects are mainly on the default compiler flags `ananicy-cpp` is built with.
- `USE_EXTERNAL_JSON:BOOL`: Use system nlohmann_json library,
- `USE_EXTERNAL_SPDLOG:BOOL`: Use system spdlog library,
- `USE_EXTERNAL_FMTLIB:BOOL`: Use system fmtlib,
- `ENABLE_SYSTEMD:BOOL`: Add systemd support,
- `USE_BPF_PROC_IMPL:BOOL`: Use BPF for processing,
- `BPF_BUILD_LIBBPF:BOOL`: Build libbpf instead of using system libary,
- `STATIC:BOOL`: Build a static binary,
#### Building
In order to actually build `ananicy-cpp`, open a terminal,
clone the repository (or download a release archive), and do the following commands:
- If using the `git` repo (development version):
- `git clone https://gitlab.com/ananicy-cpp/ananicy-cpp.git`
- `cd ananicy-cpp`
- If using release archive:
- `wget https://gitlab.com/ananicy-cpp/ananicy-cpp/-/archive/v1.1.0/ananicy-cpp-v1.1.0.tar.gz`
- `tar -xvf ananicy-cpp-v1.1.0.tar.gz`
- `cd ananicy-cpp-v1.1.0`
```
cmake -B build \
-DCMAKE_RELEASE_TYPE=Release \
-D[Your Option Here] -D[Another Option] \
-S .
cmake --build build --target ananicy-cpp
sudo cmake --install build --component Runtime
```
- If using install-deps.sh and configure.sh (example using BPF_PROC_IMPL)
- `git clone https://gitlab.com/ananicy-cpp/ananicy-cpp.git`
- `cd ananicy-cpp`
- `env USE_BPF=ON ./install-deps.sh && ./configure.sh --use_bpf_proc && ./build.sh`
- `sudo cmake --install build/RelWithDebInfo --component Runtime`
#### Service
To enable the systemd service,
enable Systemd support with `-DENABLE_SYSTEMD=ON` on `cmake` invocation, and run this command _after_ installing `ananicy-cpp`:
```
systemctl enable --now ananicy-cpp.service
```
If you want to stop or disable it later, you can use:
```
systemctl (stop|disable) ananicy-cpp.service
```
You can have more information in `systemd`'s man page (`man systemd` on Linux)
### Distro-specific
#### Arch-based distros
There is an AUR package named `ananicy-cpp`, which is maintained by me.
You can simply use your preferred AUR-helper to install it.
There is also binaries in `cachyos` and `chaotic-aur`, although `ananicy-cpp` is relatively fast to build.
## Configuration
### Global configuration
### Rules
Add rules in `/etc/ananicy.d`. This path can be overridden with `ANANICY_CPP_CONFDIR`
environment variable.
Rules are defined in files ending with `.rules`.
For instance, to add a rule for GCC, you could do the following:
- Create the `/etc/ananicy.d/10-compilers` folder.
- Create the `/etc/ananicy.d/10-compilers/gcc.rules` file
- Add `{"name": "gcc", "nice": 19, "latency_nice": 19, "sched": "batch", "ioclass": "idle"}` to the file.
You can then (re)start `ananicy-cpp.service`.
#### Supported attributes
- `nice: [-20-19]`: Set the nice value of the process.
A process with a higher nice value will be more "polite", and will get less
cpu time than processes with a lower nice value.
- `latency_nice: [-20-19]`: Set the latency_nice value of the process.
A process with a lower latency_nice value indicates the task to have the least
latency as compared to the task having a higher latency_nice.
A additonal kernel patch is needed see [latency_nice](https://lore.kernel.org/lkml/20221110175009.18458-1-vincent.guittot@linaro.org/)
- `sched: {"fifo", "rr", "normal", "batch", "idle"}`:
Set the scheduling policy.
- `fifo` and `rr` (for round-robin) are realtime scheduling policies, and must only be used for
latency critical programs, like `Xorg` or `pulseaudio` for instance. Nice values are ignored,
`rtprio` should be used instead.
- `deadline`: Special realtime scheduling policy which _can't_ be set by `ananicy-cpp`,
but can be reported by it.
- `normal` is well... normal, the default behavior for the current OS.
Specifying this option can be useful if you want to force the child of a
realtime process to have a normal scheduling policy.
- `batch`: Very useful for compilers or other CPU-hungry, non-interactive programs,
like compilers for instance. It can actually improve their performance with almost no cost
on the rest of the system.
- `idle`: Very, very low priority, even lower than a nice value of `19`.
Useful for background, low priority stuff, like file indexer for instance.
- `rtprio: [0, 99]`: Sets the static priority of a process. Only relevant if the actual scheduling policy
of a process is a realtime one, i.e. `fifo`, `rr` or `deadline`.
A higher value means a higher priority.
- `ioclass: {"best-effort", "realtime", "idle", "none"}`:
Define the IO scheduling policy. By default, it is `best-effort`.
**Only the CFQ I/O scheduler supports `ioclass` and `ionice`, see [ioprio_set](https://man7.org/linux/man-pages/man2/ioprio_set.2.html)**.
- `realtime` is to be used cautiously, as the process will have the absolute priority
above all `best-effort` processes, and can [starve][wikipedia:starvation] them.
This could prevent you from starting a shell, for instance.
- `ionice: [0, 7]`. Lower value is higher priority.
- `idle`: Process gets I/O resources after all other processes.
This could [starve][wikipedia:starvation] the process.
- `ionice` is completely ignored.
- `none`: Reset I/O policy to system default, `ionice` must be `0`.
- `best-effort`: Try to fairly share I/O resources between processes.
- `ionice: [0, 7]`. Lower value is higher priority.
- `oom_score_adj: [-999, 999]`: Adjust the **O**ut **O**f **M**emory killer score of a process.
Negative value decrease the score of the process, making it _less_ likely to be killed if available memory
gets very low. It is recommended to use it on critical programs which must be killed last if you lack memory.
- `cgroup`: Put the process in the specified cgroup. This can be any cgroup, including those created outside `ananicy-cpp`.
- `type`: Set the type of the rule. All options defined in the type will be used as if written explicitly in the rule,
although you can override each option if needed.
[wikipedia:starvation]: https://en.wikipedia.org/wiki/Starvation_(computer_science)
### Types
To avoid repeating yourself, you can add types.
It must be defined in a `.types` file.
The syntax is the following:
~~~json
{"type": "my_type", "nice": 19, "other_parameter": "value"}
~~~
It can then be used in any rule by simply adding the `type` property to the rule.
For instance, `{"name": "gcc", "type": "compiler"}`
Parameters can be overridden, for instance:
~~~json
{"type": "compiler", "nice": 19, "sched": "batch", "ioclass": "idle"}
~~~
~~~json
{"name": "gcc", "type": "compiler", "ioclass": "none", "ionice": 0}
~~~
### Cgroups
They are defined in `.cgroups` files.
`cgroup_v1` are recommended for proper functionality (see issue #21), they can be forced by
passing `systemd.unified_cgroup_hierarchy=0` to your kernel cmdline (by editing `/etc/default/grub` for instance).
Only one attribute is supported, `CPUQuota`:
~~~json
{"cgroup": "cpu80", "CPUQuota": 80}
~~~
One major limitations of `cgroups` right now is that they can only be created by the `root` user.
You can _not_ use a `CAP_SYS_CGROUP` capability thing like for other things, because it simply does not exist yet.
If it is ever implemented in the Linux kernel, please create an issue.
### Community rules
#### From the original project
You can use the original Ananicy's rules by copying the `00-default`, `00-types.types` and `00-cgroups.cgroups` to you `ananicy.d` directory (by default, in `/etc`).
## Why rewriting ananicy?
I mostly used Ananicy on older computers to improve interactivity. However, having Ananicy use megabytes of RAM
and a decent amount of CPU time troubled me. Thus I decided to rewrite it in C++, using an event based approach.
RAM usage is much lower (only a few thousands of bytes !), and CPU usage is almost always zero thanks to its
event-based implementation.

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material under section 10.
9. Acceptance Not Required for Having Copies.
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run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
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nothing other than this License grants you permission to propagate or
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10. Automatic Licensing of Downstream Recipients.
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the predecessor has it or can get it with reasonable efforts.
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11. Patents.
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Nothing in this License shall be construed as excluding or limiting
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12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
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to collect a royalty for further conveying from those to whom you convey
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13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
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but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
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14. Revised Versions of this License.
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15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
Ananicy Cpp
Copyright (C) 2021 Antoine Viallon
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) 2021 Antoine Viallon
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.