Jan 28, 2026 14:00:00

scx_horoscope is a Linux CPU scheduler that determines resource allocation based on planetary positions and constellations in astrology.

In Linux system management, resource allocation is typically determined by kernel algorithms, but the CPU scheduler ' scx_horoscope ' developed by Red Hat software engineer Lucas Zampieri schedules CPU resources in real time, reflecting astrological factors such as planetary positions and constellations.

zampierilucas/scx_horoscope: Astrological CPU Scheduler

https://github.com/zampierilucas/scx_horoscope

scx_horoscope was developed to demonstrate the flexibility and power of sched_ext , a framework that allows you to implement custom schedulers without patching the Linux kernel. Internally, it uses astronomy software libraries to calculate accurate planetary positions, loads them into the kernel via Berkeley Packet Filter (BPF), and actually schedules system tasks.

Developer Zampieri's philosophy is 'Let the universe guide us, not let humans decide CPU priorities.' Each planet in scx_horoscope is responsible for a specific system task. For example, the Sun, representing vitality, governs important system processes like PID 1; the Moon, representing emotion, governs interactive tasks like the shell and editor; and Mercury, representing communication, governs network and I/O tasks.

When a particular planet is

retrograde , tasks in that planet's domain are penalized by 50%. For example, network and interactive tasks will be significantly slower when Mercury is retrograde. This means users will experience the 'cosmic chaos' firsthand in their digital environment.

Additionally, the element of your zodiac sign will also have boosts and debuffs. During the 'fire element' of Aries, Leo, and Sagittarius, CPU-intensive tasks will be boosted by 1.5x. Meanwhile, the 'water element' of Cancer, Scorpio, and Pisces will be limited to 0.6x CPU tasks, since water is interpreted as extinguishing fire.

Zampieri has released scx_horoscope under the GPL-2.0 license, but he states that 'scx_horoscope is a scientifically questionable, cosmically ridiculous project, entirely for educational and entertainment purposes.' It is not recommended to use scx_horoscope in production systems, not because of instability due to bugs, but because tasks are delayed or accelerated according to astrological rules.