triton-ascend-case-reduction-amin-large

triton-ascend-case-reduction-amin-large is a skill for Claude Code, Codex from mindspore-ai/akg. It costs 90 tokens per session (617 once invoked), scanned A, original, Apache-2.0.

A specialized optimization note for very large one-dimensional minimum reductions in Triton on Ascend hardware.

In plain words
What is it for?
Use it as a reference when tuning an `amin` kernel for an array with about four million elements and similar hardware constraints.
Why use it?
It documents ways to split the work and combine partial minimums efficiently for a specific large-array case.

Skill for Claude CodeCodex

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

Good fit Use it as a reference when tuning an amin kernel for an array with about four million elements and similar hardware constraints.

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Install with agentmods
npx agentmods add skills/mindspore-ai/akg/triton-ascend-case-reduction-amin-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-amin-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 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 617 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 $0.00090 $0.00617
Opus 5 $0.00045 $0.00309
Sonnet 5 $0.00018 $0.00123
Haiku 4.5 $0.00009 $0.00062

Measured 9d ago against content hash a362b601e2ea, 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-amin-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-amin-large/SKILL.md · 63 lines

What it actually says

极大规模 1D Amin 归约优化

任务特征

  • 数据尺寸:(4194304,),极大规模1D数据

优化 1:二次切分

pid = tl.program_id(0)
for start in range(0, BLOCK_SIZE, SUB_BLOCK_SIZE):
    offsets = pid * BLOCK_SIZE + start + tl.arange(0, SUB_BLOCK_SIZE)

优化 2:计算重组

# 错误:简单
row_min = float('inf')
for n_start in range(0, BLOCK_SIZE, SUB_BLOCK_SIZE):
    curr_min = tl.min(block_data)
    row_min = tl.minimum(curr_min, row_min)

# 正确:优化
curr_min = tl.full((SUB_BLOCK_SIZE,), float('inf'), dtype=tl.float32)
for start in range(0, BLOCK_SIZE, SUB_BLOCK_SIZE):
    curr_min = tl.minimum(curr_min, block_data)
min_val = tl.min(curr_min)

Autotune 配置

# (AI core=40)
# 1. grid=16<40, UB用满 -> 15.12 us
triton.Config({'BLOCK_SIZE': 262144, 'SUB_BLOCK_SIZE': 16384})

# 2. grid=32<40, UB用满 -> 9.61 us 最优
triton.Config({'BLOCK_SIZE': 131072, 'SUB_BLOCK_SIZE': 16384})

# 3. grid=32, UB未用满 -> 10.29 us
triton.Config({'BLOCK_SIZE': 131072, 'SUB_BLOCK_SIZE': 8192})

# 4. grid=40, UB用满, 有尾块 -> 10.17 us
triton.Config({'BLOCK_SIZE': 104858, 'SUB_BLOCK_SIZE': 16384})

# 5. grid=64>40, UB用满 -> 11.64 us
triton.Config({'BLOCK_SIZE': 65536, 'SUB_BLOCK_SIZE': 32768})

总结

网格数接近AI Core数量、UB用满、无尾块时性能最优。二次切分避免超出硬件缓存。

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 · 63 lines · 90 tokens per session scan A a362b601e2ea

Subscribe to this mod's changes

triton-ascend-case-reduction-amin-large is a skill published in the GitHub repository mindspore-ai/akg (259 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 90 tokens to every session and 617 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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