profiler-ncu SKILL.md skillA

profiler-ncu from tongminglaic/ako4x is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add tongminglaic/ako4x/profiler-ncu@git:20260531.0fd4b5f

Pins git:20260531.0fd4b5f in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: tongminglaic/ako4x
Path: templates/skills/profiler-ncu/SKILL.md
Versions recorded: 1
Latest version: git:20260531.0fd4b5f, committed May 31, 2026
Size: 2,177 bytes
Repository stars: 84
License: MIT

Run NVIDIA Nsight Compute (NCU) per-kernel profiling for register pressure, occupancy, stall-reason, memory-throughput, and IPC analysis. Use BEFORE architecting an optimization fix — not only after — when a hypothesis about microarchitectural behavior needs verification. NCU `Duration` is NOT comparable to bench timing; use NCU for ratios only.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Profiler (NCU)

Wrapper around `ncu`. Command entry: `bash scripts/profile.sh`.

Detailed reference: `ncu.md`. Top-level commands:

```bash
bash scripts/profile.sh --list
bash scripts/profile.sh --index 5                          # default --set detailed --page details
bash scripts/profile.sh --index 5 --set full
bash scripts/profile.sh --index 5 --kernel-name ".*name.*"
bash scripts/profile.sh --index 5 --sections LaunchStats,Occupancy
bash scripts/profile.sh --index 5 --env NO_GRAPH=1         # modal backend; on local, prefix the run with NO_GRAPH=1
```

## Key constraints

- **NCU under graph capture is largely blind** — graph-launched kernels go through `cuGraphLaunch` and the `--kernel-name` filter often returns "No kernels were profiled". If your kernel uses `torch.cuda.CUDAGraph`, install a module-level `_NO_GRAPH = bool(os.environ.get("NO_GRAPH"))` gate AND set `NO_GRAPH=1` — modal backend via `--env NO_GRAPH=1`, local backend by exporting it in the shell (`run_local_profile.py` has no `--env` flag). See `ncu.md` "CUDA graph capture interaction".
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add tongminglaic/ako4x/profiler-ncu@sha256:671d0c65b298e0e6

The line at the top of this page pins the label git:20260531.0fd4b5f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_dghrhj3h4zfsfwyg.svg)](https://markdownregistry.com/a/art_dghrhj3h4zfsfwyg)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on May 31, 2026.

version	committed	commit	size	audit
git:20260531.0fd4b5f latest	2026-05-31	0fd4b5f	2,177 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (2177 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

tongminglaic/ako4x · 84 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_dghrhj3h4zfsfwyg
GET https://markdownregistry.com/api/v1/resolve?ref=tongminglaic/ako4x/profiler-ncu
GET https://markdownregistry.com/api/v1/blob/671d0c65b298e0e6f0f8161ccc098f7651ba3d03db6fb4589f79c2754139bbe2

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.