vasilito
2597246908
Activates the v1.25-deferred 'persistent rate sparkline' future-use.
Each process in the Process tab now shows a 12-sample sparkline
of its IO rate history (last 78 seconds at the 6.5s process
refresh cadence).
- New App.io_history: BTreeMap<u32, VecDeque<u64>>
Per-PID history of raw f64-bit rate samples. BTreeMap for
stable iteration; VecDeque for O(1) push-back + pop-front.
- PROCESS_IO_HISTORY_LEN = 12 (12 samples * 6.5s = 78s of history)
- App::update_io_history() runs after sort_tree + apply_fold
on every process refresh. Three-pass algorithm:
1. Reap: drop history for PIDs that exited
2. Append: push new f64-bit sample for PIDs with known rate
(PIDs with None rate are skipped, no entry created)
3. Normalize: divide each sample by the per-history max,
scale to u8 0..=255. Separate pass so max is computed
once per history, not per sample.
- render::io_rate_sparkline(&[u8]) helper maps 0..=255 to
Unicode chars (\u2581\u2582... matches existing load sparkline)
- New 'IO-RATE' column in Process panel between RSS/VSZ and
COMM. 12 chars wide. Empty spaces for PIDs with no history
yet (first tick after startup).
- Why u64 storage of f64 bits: normalization needs the full
f64 range; clamping to u8 before normalize would lose
precision for high-rate PIDs.
Test count 117 -> 121 (+4):
- update_io_history_reaps_exited_pids
- update_io_history_normalizes_against_max (100/200*255=127.5
rounds to 128; 200/200*255=255)
- update_io_history_handles_all_zero (no div by zero)
- update_io_history_skips_pids_without_rate (None rate \u2192
no entry created; no panic)
Redox stripped binary: 4,201,320 bytes (+4 KiB from v1.30).
Memory: ~91 KiB for 600 PIDs (negligible).
Compile warnings: 55 (unchanged).
Notes:
- CPU% sparkline per process: defer (same pattern, separate work)
- RSS sparkline per process: defer
- Variable sparkline length: defer (header is 'IO-RATE' not
'IO-RATE 12' so a future change to PROCESS_IO_HISTORY_LEN
doesn't need a header update)
- Per-PID scaling (not global): each PID's max is 255. A
long-running PID at 5 KiB/s steady shows full bars; a
bursty PID that just started at 50 KiB/s also shows full
bars. Global scaling would flatten the long-running one.
Docs: local/docs/redbear-power-improvement-plan.md \xC2\xA755
Red Bear OS
A microkernel operating system written in Rust, derived from Redox OS
What is Red Bear OS?
Red Bear OS is a general-purpose, Unix-like operating system with a microkernel architecture, written in Rust. It is a full fork of Redox OS, frozen at release 0.1.0, with added hardware support, filesystem drivers, and a KDE Plasma desktop path.
Goals:
- AMD & Intel parity — first-class support for both platforms on bare metal
- KDE Plasma desktop — Wayland-based desktop environment via the KWin compositor
- Hardware GPU acceleration — AMD GPU (amdgpu) and Intel GPU drivers via
redox-drm - Modern subsystems — USB, Wi‑Fi, Bluetooth, ext4, GRUB, D-Bus
- Offline-first builds — reproducible from archived, BLAKE3-verified sources
Quick Start
Prerequisites
Linux x86_64 host with Rust nightly, QEMU, nasm, and standard build tools.
See the Redox Build Guide for full setup.
Build & Run
# Clone
git clone https://gitea.redbearos.org/vasilito/RedBear-OS.git
cd RedBear-OS
# Recommended: use the Red Bear wrapper
./local/scripts/build-redbear.sh redbear-mini # Text-only target
./local/scripts/build-redbear.sh redbear-full # Desktop-capable target
# Boot in QEMU with the resulting image
make qemu
Build script:
local/scripts/build-redbear.shis the canonical entry point. Baremake allworks but bypasses the.configchecking andREDBEAR_ALLOW_PROTECTED_FETCH=1gates thatbuild-redbear.shenforces. SeeAGENTS.md§ Build Commands for full details.
Public Scripts
| Script | Purpose |
|---|---|
local/scripts/build-redbear.sh |
Canonical build wrapper for redbear-mini/full/grub |
scripts/run.sh |
Build and run in QEMU (-b to build, -c <config> for target) |
scripts/build-iso.sh |
Build a live ISO for bare-metal boot |
scripts/build-all-isos.sh |
Build all live ISO targets |
scripts/network-boot.sh |
PXE network boot helper |
scripts/dual-boot.sh |
Dual-boot installation helper |
Config Targets
| Target | Type | Description |
|---|---|---|
redbear-full |
Desktop | Wayland + KDE + GPU drivers + D-Bus services |
redbear-mini |
Console | Text-only recovery / install target |
redbear-grub |
Console | Text-only with GRUB boot manager |
Current Status
Red Bear OS boots to a login prompt in QEMU with working wired networking, D-Bus system bus, hardware detection daemons, and filesystem support (RedoxFS, ext4, FAT).
| Area | Status |
|---|---|
| Boot (ACPI/x2APIC/SMP) | ✅ Bare-metal proven |
| Userspace drivers (PCI, storage, net) | ✅ Working in QEMU |
| D-Bus system bus + services | ✅ Working (login1, PolicyKit, UDisks, UPower) |
| ext4 / FAT filesystems | ✅ Compiles, installer-wired |
| POSIX gaps (relibc) | 🚧 Bounded Wayland-facing support |
| DRM/KMS display drivers | 🚧 AMD + Intel compile; HW validation pending |
| Wayland compositor | 🚧 Bounded proof; Qt6/KF6 clients crash at init |
| KDE Plasma desktop | 🔄 In progress (Qt6/KF6 compile; KWin/QML blocked) |
| Wi‑Fi / Bluetooth | 📋 Planned (architected, implementation pending) |
How It Works
Red Bear OS uses a userspace driver model — all drivers run as unprivileged daemons:
Kernel (microkernel)
└── schemes: memory, irq, event, pipe, debug
└── Driver daemons (userspace)
├── pcid → PCI enumeration
├── e1000d → Intel ethernet
├── xhcid → USB controller
└── vesad → Display framebuffer
The kernel provides minimal services (memory, interrupts, IPC). Everything else — filesystems, networking, graphics, input — runs in userspace.
Documentation
- Implementation Plan — roadmap and execution model
- Desktop Path Plan — kernel → DRM → Mesa → Wayland → KDE
- D-Bus Integration — session bus architecture
- USB Plan — USB stack design
- Wi‑Fi Plan — wireless architecture
- Bluetooth Plan — BT stack design
- Documentation Index — full doc map
Contributing
Red Bear OS uses a full fork model. Upstream Redox sources are frozen and archived. All custom work lives in local/:
local/
├── patches/ # Durable changes to upstream source trees
├── recipes/ # Custom packages (drivers, GPU, system)
├── docs/ # Integration and planning docs
└── scripts/ # Build, test, and release tooling
We welcome contributions made with or without AI assistance — we care about quality, not how the code was produced.
License
MIT — same as upstream Redox OS.