triton-ascend-case-reduction-mean-large

triton-ascend-case-reduction-mean-large is a skill for Claude Code, Codex from mindspore-ai/akg. It costs 97 tokens per session (573 once invoked), scanned A, original, Apache-2.0.

A specialized optimization note for Triton mean-reduction kernels on Ascend hardware, focused on large two-dimensional arrays with a long reduction axis.

In plain words
What is it for?
Use it as a reference when tuning Triton kernels that compute row means for similarly shaped large arrays.
Why use it?
The input gives performance findings for a specific workload, but not a general-purpose feature description.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it as a reference when tuning Triton kernels that compute row means for similarly shaped large arrays.

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Install with agentmods
npx agentmods add skills/mindspore-ai/akg/triton-ascend-case-reduction-mean-large
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 mindspore-ai/akg --skill triton-ascend-case-reduction-mean-large
Clone the repo
git clone --depth 1 https://github.com/mindspore-ai/akg

Made for: Claude Code, Codex.

Wrote this? Show the measurements

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README.md
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Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 573 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original 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 $0.00097 $0.00573
Opus 5 $0.00048 $0.00287
Sonnet 5 $0.00019 $0.00115
Haiku 4.5 $0.00010 $0.00057

Measured 9d ago against content hash a0ce3a89be1c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

triton-ascend-case-reduction-mean-large 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 9d ago.

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.

akg_agents/python/akg_agents/op/resources/skills/triton-ascend/cases/triton-ascend-case-reduction-mean-large/SKILL.md · 50 lines

What it actually says

大规模 Mean 归约优化(行二次切分)

任务特征

  • 数据尺寸:(1000, 8192),非reduce轴中等,reduce轴较大

优化:行二次切分

pid = tl.program_id(0)
for m_start in range(0, BLOCK_SIZE_M, SUB_BLOCK_SIZE_M):
    m_offsets = pid * BLOCK_SIZE_M + m_start + tl.arange(0, SUB_BLOCK_SIZE_M)

目的

  • 每个kernel计算多行(BLOCK_SIZE_M),减少总线程块数量
  • Kernel内对行进行二次切分(SUB_BLOCK_SIZE_M),避免超出硬件缓存

Autotune 配置

# (AI core=40)
# 1. grid<40 -> 28.64 us
triton.Config({'BLOCK_SIZE_M': 50, 'SUB_BLOCK_SIZE_M': 25, 'BLOCK_SIZE_N': 512})

# 2. grid=40,SUB切分含尾块 -> 16.54 us
triton.Config({'BLOCK_SIZE_M': 25, 'SUB_BLOCK_SIZE_M': 4, 'BLOCK_SIZE_N': 4096})

# 3. grid=40,SUB切分不含尾块 -> 16.00 us 最优
triton.Config({'BLOCK_SIZE_M': 25, 'SUB_BLOCK_SIZE_M': 25, 'BLOCK_SIZE_N': 512})

# 4. grid>40,且非核数整数倍 -> 25.86 us
triton.Config({'BLOCK_SIZE_M': 20, 'SUB_BLOCK_SIZE_M': 20, 'BLOCK_SIZE_N': 512})

总结

  1. grid等于核数,SUB切分不含尾块时性能最优
  2. 尾块计算会降低性能
  3. grid超出核数且非核数整数倍时,各核计算任务不均匀,性能较差
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. 9d ago First seen · 50 lines · 97 tokens per session scan A a0ce3a89be1c

Subscribe to this mod's changes

triton-ascend-case-reduction-mean-large is a skill published in the GitHub repository mindspore-ai/akg (259 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 97 tokens to every session and 573 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.

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