triton-ascend-case-reduction-mean-medium

triton-ascend-case-reduction-mean-medium is a skill for Claude Code, Codex from mindspore-ai/akg. It costs 82 tokens per session (529 once invoked), scanned A, original, Apache-2.0.

A guide to optimizing medium-sized mean reductions, which calculate the average across one dimension of a tensor on an Ascend AI processor.

In plain words
What is it for?
Use it when tuning 2D Triton kernels for mean reductions with a medium-sized non-reduced dimension.
Why use it?
It shows how to reorganize partial sums and choose a grid size that avoids inefficient leftover blocks.

Skill for Claude CodeCodex

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

Good fit Use it when tuning 2D Triton kernels for mean reductions with a medium-sized non-reduced dimension.

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

Made for: Claude Code, Codex.

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README.md
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Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 529 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 $0.00082 $0.00529
Opus 5 $0.00041 $0.00264
Sonnet 5 $0.00016 $0.00106
Haiku 4.5 $0.00008 $0.00053

Measured 9d ago against content hash c2a87b6a4bac, 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-medium 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-medium/SKILL.md · 54 lines

What it actually says

中等规模 Mean 归约优化(reduce第一根轴)

任务特征

  • 数据尺寸:(1024, 4096),reduce第一根轴,非reduce轴中等

优化:计算重组

# 简单
total_sum = 0.0
for n_offset in range(0, N, BLOCK_SIZE):
  错误:row_sum += tl.sum(block_vals)

# 正确:优化
col_sum = tl.zeros((BLOCK_SIZE_M, BLOCK_SIZE_N), dtype=tl.float32)
for m_start in range(0, M, BLOCK_SIZE_M):
    col_sum += block_vals
col_sum = tl.sum(col_sum, axis=0)

Autotune 配置

# (AI core=40)
# 1. grid=16<40, UB占满 -> 13.32 us
triton.Config({'BLOCK_SIZE_M': 64, 'BLOCK_SIZE_N': 256})

# 2. grid=40,有尾块 -> 35.12 us
triton.Config({'BLOCK_SIZE_M': 128, 'BLOCK_SIZE_N': 103})

# 3. grid=32<40,UB占满 -> 9.98 us 最优
triton.Config({'BLOCK_SIZE_M': 128, 'BLOCK_SIZE_N': 128})

# 4. grid=64>40,UB占满 -> 13.33 us
triton.Config({'BLOCK_SIZE_M': 256, 'BLOCK_SIZE_N': 64})

# 5. grid=128>40,UB占满 -> 22.22 us
triton.Config({'BLOCK_SIZE_M': 512, 'BLOCK_SIZE_N': 32})

总结

网格规模略小于AI Core数量且避免尾块时性能最佳。尾块导致性能大幅下降。

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 · 54 lines · 82 tokens per session scan A c2a87b6a4bac

Subscribe to this mod's changes

triton-ascend-case-reduction-mean-medium is a skill published in the GitHub repository mindspore-ai/akg (259 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 82 tokens to every session and 529 once invoked, about $0.0004 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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