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vllm-ascend-profiler-diff

Compare two Ascend profiler outputs to quantify performance deltas and regressions.

3|1|Updated Feb 2, 2026
Search Tags:#performance#analysis#trace#diff#attribution#profiler#ascend
One-click install
npx skills add https://github.com/sunchendd/good_skills --skill vllm-ascend-profiler-diff
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: vllm-ascend-profiler-diff
Source: https://github.com/sunchendd/good_skills/tree/main/vllm-ascend-profiler-diff
Command: npx skills add https://github.com/sunchendd/good_skills --skill vllm-ascend-profiler-diff

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This skill provides a structured workflow to compare two Ascend Profiler runs, quantify performance deltas, and optionally trace findings back to source and PRs. The design supports evaluating prefill/decoding, kernel/op deltas, Host/sync behavior, and trace distribution to pinpoint regressions across runs.

Core Features & Use Cases

  • Compare two ASCEND_PROFILER_OUTPUT directories to surface performance deltas and regressions.
  • Step through sanity checks, overall metrics alignment, stage-level attribution, kernel/op dimension, API signals, and optional source/PR attribution.
  • Use cases include debugging performance regressions between baseline and newer runs, attributing changes to specific modules, and generating evidence-backed reports.

Quick Start

Provide Profile A and Profile B ASCEND_PROFILER_OUTPUT directories and run the workflow to generate a comparative report.

Frequently Asked Questions about vllm-ascend-profiler-diff

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I compare two Ascend profiler outputs to find performance regressions?▼

To compare Ascend profiler outputs and find regressions, provide two ASCEND_PROFILER_OUTPUT directories. The analysis quantifies performance deltas across prefill, decode, kernel, and operator dimensions to generate a structured report.

What is Ascend profiler diff analysis and when do I need it?▼

Ascend profiler diff analysis evaluates performance deltas between two profiling runs. You need it when debugging regressions between a baseline and a newer run, attributing changes to specific modules, or generating evidence-backed reports.

How do I attribute Ascend profiler regressions to specific source code and PRs?▼

To attribute Ascend profiler regressions to source and PRs, provide a path to the source repository and version tags alongside the two ASCEND_PROFILER_OUTPUT directories to anchor findings and trace changes to specific commits.

Can I use benchmark JSON files to align overall metrics during an Ascend profiler comparison?▼

Yes, you can provide optional Benchmark JSONs alongside the Profile A and Profile B ASCEND_PROFILER_OUTPUT directories. These files support overall metrics alignment and sanity checks during the comparative analysis workflow.

What dimensions does the Ascend profiler comparison analyze for performance deltas?▼

The Ascend profiler comparison analyzes performance deltas across prefill and decode phases, kernel and operator deltas, host synchronization behavior, and trace distribution to pinpoint regressions.

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