perfetto-mcp MCP — Cas d'usage, Installer & Démo en direct

Pourquoi l'utiliser

Fonctionnalités clés

Categories: Exploration, Performance (ANR, CPU, jank), Concurrency (locks, Binder), Memory
Custom SQL tool for when you know what you want
Targets Android / Linux Perfetto traces
Install via uvx perfetto-mcp (Python 3.13+)
Apache 2.0

Démo en direct

Aperçu en pratique

perfetto.replay ▶ prêt

0/0

Installer

Choisissez votre client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Ouvrez Claude Desktop → Settings → Developer → Edit Config. Redémarrez après avoir enregistré.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Cursor utilise le même schéma mcpServers que Claude Desktop. La config projet l'emporte sur la globale.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Cliquez sur l'icône MCP Servers dans la barre latérale Cline, puis "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Même format que Claude Desktop. Redémarrez Windsurf pour appliquer.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "perfetto",
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ]
    }
  ]
}

Continue utilise un tableau d'objets serveur plutôt qu'une map.

~/.config/zed/settings.json

{
  "context_servers": {
    "perfetto": {
      "command": {
        "path": "uvx",
        "args": [
          "perfetto-mcp"
        ]
      }
    }
  }
}

Ajoutez dans context_servers. Zed recharge à chaud à la sauvegarde.

claude mcp add perfetto -- uvx perfetto-mcp

Une seule ligne. Vérifiez avec claude mcp list. Supprimez avec claude mcp remove.

Cas d'usage

Usages concrets : perfetto-mcp

Find the cause of UI jank in a recorded trace

👤 Android devs, perf engineers ⏱ ~25 min advanced

Quand l'utiliser : User report: 'the app stutters when I scroll'. You captured a Perfetto trace. Now what?

Prérequis

Perfetto .pftrace file — perfetto / systrace / Android Studio Profiler

Déroulement

Point MCP at the trace

Open /tmp/jank.pftrace for process com.example.app. Find jank frames — anything over 16.67ms on the main thread.✓ Copié

→ List of janky frames with slice context
Attribute the cause

For the top 3 janky frames, what slice dominated? What was the main thread doing when the frame missed?✓ Copié

→ Cause per frame
Propose fix

Based on these bottlenecks, suggest concrete changes (move off main, cache, etc.).✓ Copié

→ Fix plan

Résultat : Jank root cause identified without staring at the timeline UI.

Pièges

Sample interval too coarse — missing short hot methods — Re-record with higher sampling frequency when needed

Diagnose an ANR from a trace

👤 Android devs dealing with ANRs ⏱ ~20 min advanced

Quand l'utiliser : Production ANR and you can capture a trace.

Déroulement

Detect

Run ANR analysis on /traces/anr.pftrace for process com.example.app. What blocked the main thread?✓ Copié

→ Blocking chain
Identify lock

Was this a lock contention? Identify holder vs waiter threads and the resource.✓ Copié

→ Contention diagram

Résultat : ANR root cause + whom to wake up on-call.

Hunt a suspected memory leak

👤 Android / native devs ⏱ ~30 min advanced

Quand l'utiliser : Heap keeps growing over time on a given screen.

Déroulement

Analyze heap

For trace X, process Y: run memory analysis. What allocations dominate and does the retained set grow monotonically?✓ Copié

→ Allocation summary + trend
Correlate

What activities / fragments / slices correlate with growth spikes?✓ Copié

→ Correlation report

Résultat : Leak suspects identified.

Pièges

GC hasn't run yet — growth isn't necessarily leak — Trigger GC between recordings; compare

Combinaisons

Associez-le à d'autres MCPs pour un effet X10

perfetto + filesystem

Save per-release trace analysis for regression tracking

Analyze jank trace for vX.Y.Z and save summary to /perf-reports/vX.Y.Z.md.✓ Copié

Outils

Ce que ce MCP expose

Outil	Entrées	Quand appeler	Coût
explore_slices	trace_path, process, time_range?	Get your bearings in a new trace	free
detect_anr	trace_path, process	ANR investigation	free
cpu_profile	trace_path, process, threshold_ms?	CPU hotspot hunt	free
thread_contention	trace_path, process	Concurrency issues	free
memory_analysis	trace_path, process	Memory investigations	free
custom_sql	trace_path, sql: str	You know the exact Perfetto SQL you want	free

Coût et limites

Coût d'exécution

Quota d'API: None (local)
Tokens par appel: Trace summaries 2k-10k tokens typically
Monétaire: Free (Apache 2.0)
Astuce: Always pass a time range if you know roughly when the issue occurred — slashes query time and tokens.

Sécurité

Permissions, secrets, portée

Stockage des identifiants : None; local trace files

Sortie de données : Summaries go to your LLM provider — traces can include sensitive process/app names

Traces may contain internal process names and package paths; treat as confidential if from proprietary apps.
Requires Python 3.13+ — check before installing.

Dépannage

Erreurs courantes et correctifs

Trace file too large to parse

Perfetto can handle GB-scale traces but first call can be slow. Give it time; subsequent queries are faster.

Process name not found

Verify with custom_sql SELECT name FROM process. Process names can differ from app package IDs.

Python version error

Needs 3.13+. Use uv python install 3.13 then uvx perfetto-mcp.

Vérifier : python --version

Alternatives

perfetto-mcp vs autres

Alternative	Quand l'utiliser	Compromis
Perfetto UI (ui.perfetto.dev)	You want visual timeline analysis	Manual; no LLM explanations
Android Studio Profiler	You live inside Android Studio	IDE-bound; less scriptable

Plus

Ressources

📖 Lire le README officiel sur GitHub

🐙 Voir les issues ouvertes

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