perf-torch-sync-free

perf-torch-sync-free is a skill for Claude Code, Codex from wenyi-li/awesome-agent-kernel-skills. It costs 99 tokens per session (2,497 once invoked), scanned A, original, no licence file.

A guide to finding and removing unnecessary waits between the CPU and GPU in PyTorch. These waits can happen when code asks the CPU to read a value or copy data from GPU memory.

In plain words
What is it for?
Use it to investigate operations such as .item(), .cpu(), boolean indexing, and CUDA tensor construction, then replace avoidable synchronization patterns.
Why use it?
Unnecessary synchronization can leave the GPU idle and slow down otherwise parallel code. The guide distinguishes real dependencies from waits that can be avoided.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to investigate operations such as .item(), .cpu(), boolean indexing, and CUDA tensor construction, then replace avoidable synchronization patterns.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add wenyi-li/awesome-agent-kernel-skills --skill perf-torch-sync-free
Clone the repo
git clone --depth 1 https://github.com/wenyi-li/awesome-agent-kernel-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for perf-torch-sync-free

README.md
[![agentmods](https://agentmods.dev/badge/skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free/github.svg)](https://agentmods.dev/skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free)
Your own site
<a href="https://agentmods.dev/skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free"><img src="https://agentmods.dev/badge/skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for perf-torch-sync-free

Your own site · 80×15
<a href="https://agentmods.dev/skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free"><img src="https://agentmods.dev/badge/skills/wenyi-li/awesome-agent-kernel-skills/perf-torch-sync-free.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 99 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,497 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00099 $0.02497
Opus 5 $0.00049 $0.01248
Sonnet 5 $0.00020 $0.00499
Haiku 4.5 $0.00010 $0.00250

Measured 7d ago against content hash bf46757e5ba4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

perf-torch-sync-free scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/verify_workload.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

perf-torch-sync-free/SKILL.md · 270 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 270 lines · 99 tokens per session scan A bf46757e5ba4

Subscribe to this mod's changes

perf-torch-sync-free is a skill published in the GitHub repository wenyi-li/awesome-agent-kernel-skills (9 stars, last pushed 3mo ago), with no licence file. It adds 99 tokens to every session and 2,497 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Related

Other skills, from other repositories

hardwood-cli

Inspect, debug, and convert Apache Parquet files with the hardwood CLI. Use whenever a user is debugging code that reads or writes Parquet (Arrow / Spark / Flink / Java / Python) and the data file itself may be the cause — to check the schema, physical and logical types, repetition, or a row sample. Use it to diagnose…

hardwood-hq/hardwood · 216 tokens

submit-github-bug-issue

Use when converting QA findings, black-box failures, red-team reports, regression evidence, or local bug notes into GitHub Issues for NVIDIA/TensorRT-Model-Connect. Standardizes checking issue templates, checking labels, de-duplicating existing issues, drafting a bug report, creating the issue on GitHub, applying the…

NVIDIA/TensorRT-Model-Connect · 82 tokens

debug-trt-mismatch

Diagnose a TensorRT-Model-Connect family whose native output disagrees with its declared reference or family-owned correctness contract.

NVIDIA/TensorRT-Model-Connect · 31 tokens

profile-model

Measure one TensorRT-Model-Connect model through its public Task API or run a checked-in performance-matrix entry with comparable evidence.

NVIDIA/TensorRT-Model-Connect · 30 tokens

art-of-debugging

Systematic methodology and concrete tool recipes for debugging Unix, Python, and PyTorch programs - crashes, hangs, segfaults, wrong output, CUDA OOM, NaN/Inf, slowness, and multi-node/multi-GPU issues. Use when a program crashes, hangs, deadlocks, segfaults, runs out of memory (OOM), produces NaN/Inf or wrong…

stas00/the-art-of-debugging · 193 tokens

tensorboard

Visualize training metrics, debug models with histograms, compare experiments, visualize model graphs, and profile performance with TensorBoard - Google's ML visualization toolkit.

davila7/claude-code-templates · 32 tokens