sysmon-tui

A lightweight system monitor TUI built in Rust. Designed for monitoring GPU inference workloads on NVIDIA Jetson and similar Linux machines over SSH.

Features

• CPU — average gauge + per-core breakdown with color coding
• RAM — usage gauge with GiB readout
• Thermals — reads Linux sysfs thermal zones (GPU, CPU, SoC) and hwmon sensors, color-coded by severity
• Network — RX/TX sparklines with rolling history
• Disk I/O — read/write sparklines with rolling history
• Processes — sortable table (CPU or memory), updates at configurable rate
• Snapshots — press l to dump a CSV snapshot of all processes
• Status bar — shows current scan rate, snapshot path, and key hints

Install

Requires Rust 1.70+.

cargo build --release

Cross-compile for aarch64 Linux (e.g., Jetson)

If you're on an Apple Silicon Mac with Docker/OrbStack:

docker run --rm -v "$(pwd)":/app -w /app rust:latest cargo build --release
scp target/release/sysmon-tui user@host:~
ssh -t user@host ./sysmon-tui

The -t flag is required — the TUI needs a real terminal.

Usage

./sysmon-tui

Key Bindings

Key	Action
q	Quit
c	Sort processes by CPU
m	Sort processes by memory
[	Scan processes faster (250ms/500ms/1s/2s/5s)
]	Scan processes slower
l	Save CSV snapshot of current processes

Process Snapshots

Press l to dump a snapshot. Creates a timestamped CSV file:

/tmp/sysmon-tui/sysmon-2026-02-10_05-15-30.csv

Format:

timestamp,pid,name,cpu_percent,mem_bytes
2026-02-10T05:15:30.123,150627,python3,407.5,26755072000

Override the log directory:

SYSMON_LOG_DIR=~/logs ./sysmon-tui

Dependencies

Crate	Purpose
ratatui 0.29	TUI rendering
crossterm 0.28	Terminal control
sysinfo 0.38	CPU, memory, process, network metrics
chrono 0.4	Log file timestamps

License

MIT