gpumanager 0.2.1

Lightweight NVIDIA GPU utilization sampler, Slack reporter, and systemd timer helper

gpumanager

gpumanager is a lightweight Python CLI tool for sampling NVIDIA GPU utilization, storing minute-by-minute CSV snapshots, aggregating utilization over a reporting window, and sending GPU-wise summaries to Slack. It is designed to work together with a Slack incoming webhook for notifications.

The installable Python distribution is named gpumanager. The CLI entrypoint is gpumanager.

Website: https://happilee12.github.io/gpu-util-webhook/

Features

• Samples NVIDIA GPU utilization with nvidia-smi
• Stores one CSV file per sample
• Aggregates average utilization by GPU UUID
• Sends reports to Slack via webhook
• Supports interactive configuration
• Installs user-level systemd services and timers
• Uses minimal dependencies and stays close to the standard library

Requirements

• Linux
• Python 3.8+
• NVIDIA GPU
• nvidia-smi in PATH
• systemd recommended

Installation

Python 3.8 support uses small compatibility dependencies installed automatically by pip:

• tomli on Python < 3.11
• backports.zoneinfo on Python < 3.9

pip install .
# or
pipx install .

If you install with pipx, make sure the pipx binary path is added to your shell:

pipx ensurepath
source ~/.bashrc

After publishing:

pip install gpumanager
# or
pipx install gpumanager

After a published pipx install, run this once if needed:

pipx ensurepath
source ~/.bashrc

Quick Start

gpumanager install-systemd
gpumanager init

During init and interactive config set, the CLI shows the current server time and a few common cron examples so it is easier to enter report.report_time.

Test

gpumanager sample
gpumanager test

If systemd timers are already installed, gpumanager init and gpumanager config set automatically rewrite and reload the installed timer files so schedule changes take effect immediately.

Commands

• gpumanager init
• gpumanager config set
• gpumanager config show
• gpumanager sample
• gpumanager report
• gpumanager test
• gpumanager delete-csv
• gpumanager status
• gpumanager install-systemd
• gpumanager uninstall-systemd
• gpumanager disable-sample
• gpumanager disable-report

Configuration

The tool searches for configuration in this order:

1. Path passed with --config
2. GPUMANAGER_CONFIG
3. ~/.config/gpumanager/config.toml
4. /etc/gpumanager/config.toml

Example:

[slack]
webhook_url = "https://hooks.slack.com/services/..."

[storage]
csv_dir = "/var/lib/gpumanager"

[sample]
interval = "1m"

[report]
report_time = "0 9 * * *"
interval = "1h"

[general]
timezone = "Asia/Seoul"
server_name = "AICA_H100"

Common report_time examples:

• Every day at 09:00: 0 9 * * *
• Every hour: 0 * * * *
• Every 10 minutes: */10 * * * *

Sampling examples:

• Every 7 seconds: 7s
• Every 30 seconds: 30s
• Every 2 minutes: 2m
• Every 15 minutes: 15m
• Every hour: 1h

Before Running Reports

A few things must be prepared by the user before gpumanager can collect data and send Slack notifications through a Slack incoming webhook:

• nvidia-smi must work on the server
• A valid Slack incoming webhook URL must be configured
• The CSV storage directory must be writable
• If you want automatic collection and reporting, the user-level systemd timers must be enabled

Slack incoming webhook setup reference:

• https://docs.slack.dev/messaging/sending-messages-using-incoming-webhooks/

Quick manual verification:

nvidia-smi
gpumanager config show
gpumanager sample
gpumanager test

Automatic Scheduling

gpumanager does not start background collection on its own. To run sampling every minute and reporting on the configured cron-style schedule, install and enable the user timers.

Install and enable timer files:

gpumanager install-systemd

Check timer status:

systemctl --user status gpumanager-sample.timer
systemctl --user status gpumanager-report.timer

Disable only sampling:

gpumanager disable-sample

Disable only reporting:

gpumanager disable-report

Sampling

Each sample creates a CSV file named like:

2026-03-22T16-21-00.csv

Each CSV contains one row per GPU:

timestamp,gpu_index,gpu_uuid,gpu_name,util_gpu
2026-03-22T16:21:00+09:00,0,GPU-aaa,NVIDIA A100,35
2026-03-22T16:21:00+09:00,1,GPU-bbb,NVIDIA A100,2

Report Format

Reports use the configured general.server_name as the bracketed name prefix. Average GPU utilization is rounded to two decimal places.

Example:

[AICA_H100] 2025.09.06 16:49:32 KST
Window: last 1h
GPU 0: 31.38%
GPU 1: 29.39%
GPU 2: 31.57%
GPU 3: 56.36%
GPU 4: 61.25%
GPU 5: 61.52%
GPU 6: 59.88%
GPU 7: 63.93%

systemd

gpumanager install-systemd installs user services into ~/.config/systemd/user/:

• gpumanager-sample.service
• gpumanager-sample.timer
• gpumanager-report.service
• gpumanager-report.timer

Notes

• report.report_time uses a 5-field cron string such as 0 9 * * *
• sample.interval controls how often GPU utilization is sampled and saved
• report.interval controls the aggregation window shown as Window: last ... and supports minute-based values such as 1m
• Missing samples are ignored during aggregation
• The README content is used as the package long description, so this setup guide will also be visible on package index web pages after publishing