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/jetson-customize-clocks

@87053a0
by NVIDIA Corporationnvidia/skills3.5k stars
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Use to lock/cap Jetson CPU/GPU/EMC clocks, toggle EMC/CPU DVFS, or change cpufreq governors by editing BPMP DTB and nvpower.sh pre-flash. Do NOT use for live tuning or nvpmodel edits.

Requires /jetson-customize-nvpmodel /jetson-set-target /jetson-init-target /jetson-init-image /jetson-init-source /jetson-promote-image /jetson-flash-image

Ask your Agent

Use this Skill: https://skilld.dev/gh/nvidia/skills/jetson-customize-clocks

This session only. Nothing lands on disk.

referencesclock-control-model.md

≈323 tokens on demand. Your agent reads this file only when SKILL.md points to it.

Clock control model

Reference material for ../SKILL.md.

Layer stack

userspace ── nvpower.sh ──► Kernel cpufreq/devfreq ──► BPMP
  (governor, min/max,         (sysfs scaling             (clock_max_rate
   static via sysfs)           within ceiling)            ceiling, EMC bwmgr)

Each layer constrains the one below. The BPMP DTB sets the per-clock hard ceiling and gates EMC DVFS. The kernel scales dynamically within that ceiling per the active governor. nvpower.sh runs at boot to pick the governor and (optionally) write per-device rates to sysfs.

Two ceilings inside the BPMP DTB

A clock node carries up to two ceiling properties:

  • max-rate-maxn — silicon / MAXN power-profile ceiling. Read-only for customization.
  • max-rate-custom — optional customer override. The only knob; set to lower the runtime ceiling, remove (or omit) to run at max-rate-maxn.

Detailed semantics + the nvpmodel ↔ BPMP clock-node mapping live in the sibling reference bpmp-dtb-clock-edits.md.

Effective runtime ceiling

effective = min(BPMP cap, active nvpmodel cap)

Either layer can be the binding constraint. The active nvpmodel mode can clamp below max-rate-custom; use the sibling skill /jetson-customize-nvpmodel to inspect.

Source: SKILL.md on GitHub

Third-party checks

2 warnings3mo3 checks · Risk MEDIUM
  • Gen Agent Trust Hub3mo

    The skill facilitates NVIDIA Jetson clock and power customization. It involves administrative tasks using sudo and processes external system configuration files, creating a potential surface for indirect prompt injection.

  • Socket3mo

    No alerts

  • Snyk3mo

    Risk: MEDIUM · 1 issue

Provenance

Signed by skilld at 87053a0. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub yesterday.

Activeupdated 3 months ago

Capability

version
0.0.1
Other metadata
metadata
{
  "data-classification": "public",
  "author": "Jetson Team",
  "tags": [
    "clocks",
    "cpu",
    "gpu",
    "emc",
    "dvfs",
    "bwmgr",
    "bpmp",
    "nvpower",
    "cpufreq",
    "devfreq"
  ],
  "domain": "clocks"
}

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