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Files changed: - CHANGES.md - README.md - VERSION - kb/concepts/Ambient Environment Dependency.md - kb/concepts/Anti-Cramming Heuristic.md - kb/concepts/Audit Trail.md - kb/concepts/BM25.md - kb/concepts/Bulk Operations.md - kb/concepts/CI Integration.md - kb/concepts/COLLECTION.md - kb/concepts/CPPC.md - kb/concepts/Checkpoint Audit.md - kb/concepts/Claude Code Auto Mode.md - kb/concepts/Command Round-Trip Integrity.md - kb/concepts/Confidence Scoring.md - kb/concepts/Consolidation Tiers.md - kb/concepts/Content Quality Control.md - kb/concepts/Context Isolation.md - kb/concepts/Contradiction Resolution.md - kb/concepts/Cross-platform Agent Skills.md - kb/concepts/Crystallization.md - kb/concepts/Delete Rather Than Anonymize.md - kb/concepts/Denylist over Allowlist.md - kb/concepts/Detect-Repair Asymmetry.md - kb/concepts/Diff-Reviewable Agent Edits.md - kb/concepts/Dual Licensing by File Plan.md - kb/concepts/Entity Extraction.md - kb/concepts/Episodic Memory.md - kb/concepts/Event-Driven Automation.md - kb/concepts/Filter on Ingest.md - kb/concepts/Forgetting.md - kb/concepts/Graph Traversal.md - kb/concepts/Green Suite Blind Spot.md - kb/concepts/Hooks.md - kb/concepts/Hybrid Search.md - kb/concepts/INDEX.md - kb/concepts/Implementation Spectrum.md - kb/concepts/Index Scaling.md - kb/concepts/Issue Label Scheme.md - kb/concepts/Iteration and Cost Limits.md - kb/concepts/KB Migration.md - kb/concepts/KB Stack Versioning.md - kb/concepts/Knowledge Compounding.md - kb/concepts/Knowledge Graph.md - kb/concepts/LLM Wiki Pattern.md - kb/concepts/Lint Workflow.md - kb/concepts/MCP-Leseserver.md - kb/concepts/Mass-Update Gate.md - kb/concepts/Memory Lifecycle.md - kb/concepts/Mesh Sync.md - kb/concepts/Modbus.md - kb/concepts/Multi-Agent Collaboration.md - kb/concepts/Naming Convention Conflict.md - kb/concepts/OKF Compatibility.md - kb/concepts/Optional Instance Context File.md - kb/concepts/Personalization Plane.md - kb/concepts/Privacy and Governance.md - kb/concepts/Procedural Memory.md - kb/concepts/Publish-Remote Gate.md - kb/concepts/Quality Scoring.md - kb/concepts/Quality and Self-Correction.md - kb/concepts/RAG.md - kb/concepts/Reciprocal Rank Fusion.md - kb/concepts/SSD TRIM.md - kb/concepts/Scale Ceiling.md - kb/concepts/Self-Healing.md - kb/concepts/Semantic Lint Automation.md - kb/concepts/Semantic Memory.md - kb/concepts/Session Orientation.md - kb/concepts/Shared vs Private.md - kb/concepts/Split Merge Reclassify.md - kb/concepts/Split Threshold.md - kb/concepts/Structural Enforcement over Documented Rule.md - kb/concepts/Stub Threshold.md - kb/concepts/Supersession.md - kb/concepts/Three-Layer Architecture.md - kb/concepts/Token Economics.md - kb/concepts/Typed Relationships.md - kb/concepts/User Management.md - kb/concepts/Vector Search.md - kb/concepts/Work Coordination.md - kb/concepts/Workflow Extraction.md - kb/concepts/Workflow Orchestration.md - kb/concepts/Working Memory.md - kb/concepts/Write-Once Frontmatter Fields.md - kb/concepts/architectures/Consolidation Tiers.md - kb/concepts/architectures/Context Isolation.md - kb/concepts/architectures/Cross-platform Agent Skills.md - kb/concepts/architectures/Episodic Memory.md - kb/concepts/architectures/Hybrid Search.md - kb/concepts/architectures/Implementation Spectrum.md - kb/concepts/architectures/Knowledge Graph.md - kb/concepts/architectures/LLM Wiki Pattern.md - kb/concepts/architectures/MCP-Leseserver.md - kb/concepts/architectures/Memory Lifecycle.md - kb/concepts/architectures/OKF Compatibility.md - kb/concepts/architectures/Optional Instance Context File.md - kb/concepts/architectures/Personalization Plane.md - kb/concepts/architectures/Procedural Memory.md - kb/concepts/architectures/RAG.md - kb/concepts/architectures/Scale Ceiling.md - kb/concepts/architectures/Semantic Memory.md - kb/concepts/architectures/Three-Layer Architecture.md - kb/concepts/architectures/Token Economics.md - kb/concepts/architectures/Working Memory.md - kb/concepts/decisions/Delete Rather Than Anonymize.md - kb/concepts/decisions/Denylist over Allowlist.md - kb/concepts/decisions/Diff-Reviewable Agent Edits.md - kb/concepts/decisions/Dual Licensing by File Plan.md - kb/concepts/decisions/Issue Label Scheme.md - kb/concepts/decisions/KB Stack Versioning.md - kb/concepts/decisions/Structural Enforcement over Documented Rule.md - kb/concepts/patterns/Audit Trail.md - kb/concepts/patterns/BM25.md - kb/concepts/patterns/Command Round-Trip Integrity.md - kb/concepts/patterns/Confidence Scoring.md - kb/concepts/patterns/Contradiction Resolution.md - kb/concepts/patterns/Entity Extraction.md - kb/concepts/patterns/Filter on Ingest.md - kb/concepts/patterns/Forgetting.md - kb/concepts/patterns/Graph Traversal.md - kb/concepts/patterns/Mesh Sync.md - kb/concepts/patterns/Quality Scoring.md - kb/concepts/patterns/Reciprocal Rank Fusion.md - kb/concepts/patterns/Self-Healing.md - kb/concepts/patterns/Shared vs Private.md - kb/concepts/patterns/Typed Relationships.md - kb/concepts/patterns/Vector Search.md - kb/concepts/patterns/Work Coordination.md - kb/concepts/problems/Ambient Environment Dependency.md - kb/concepts/problems/Detect-Repair Asymmetry.md - kb/concepts/problems/Green Suite Blind Spot.md - kb/concepts/problems/Naming Convention Conflict.md - kb/concepts/problems/Write-Once Frontmatter Fields.md - kb/concepts/protocols/CPPC.md - kb/concepts/protocols/Modbus.md - kb/concepts/protocols/SSD TRIM.md - kb/concepts/workflows/Anti-Cramming Heuristic.md - kb/concepts/workflows/Bulk Operations.md - kb/concepts/workflows/CI Integration.md - kb/concepts/workflows/Checkpoint Audit.md - kb/concepts/workflows/Claude Code Auto Mode.md - kb/concepts/workflows/Content Quality Control.md - kb/concepts/workflows/Crystallization.md - kb/concepts/workflows/Event-Driven Automation.md - kb/concepts/workflows/Hooks.md - kb/concepts/workflows/Index Scaling.md - kb/concepts/workflows/Iteration and Cost Limits.md - kb/concepts/workflows/KB Migration.md - kb/concepts/workflows/Knowledge Compounding.md - kb/concepts/workflows/Lint Workflow.md - kb/concepts/workflows/Mass-Update Gate.md - kb/concepts/workflows/Multi-Agent Collaboration.md - kb/concepts/workflows/Privacy and Governance.md - kb/concepts/workflows/Publish-Remote Gate.md - kb/concepts/workflows/Quality and Self-Correction.md - kb/concepts/workflows/Semantic Lint Automation.md - kb/concepts/workflows/Session Orientation.md - kb/concepts/workflows/Split Merge Reclassify.md - kb/concepts/workflows/Split Threshold.md - kb/concepts/workflows/Stub Threshold.md - kb/concepts/workflows/Supersession.md - kb/concepts/workflows/User Management.md - kb/concepts/workflows/Workflow Extraction.md - kb/concepts/workflows/Workflow Orchestration.md - kb/index.md - kb/log.md - tools/CONTRACT.md - tools/README.md - tools/chemenu/catalog.py - tools/chemenu/commands/index_build.py - tools/chemenu/lint_core.py - tools/chemenu/tests/conftest.py - tools/chemenu/tests/test_cite_cmd.py - tools/chemenu/tests/test_git_publish.py - tools/chemenu/tests/test_index_build.py - tools/chemenu/tests/test_lint.py - tools/chemenu/tests/test_new_page.py - tools/chemenu/tests/test_provenance.py - tools/chemenu/tests/test_type_resolver.py - tools/chemenu/tests/test_xref.py - types/concept.md - types/type-spec.md
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type, concept_type, tags, created, modified, related, sources, confidence, confidence_base, provenance, summary
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0.95 | 0.95 | sourced | Hardwareschnittstelle Collaborative Processor Performance Control für feingranulares CPU-Power-Management zwischen Betriebssystem und AMD-Prozessor. |
CPPC
Typ: Protokoll
Definition
CPPC (Collaborative Processor Performance Control) ist eine Hardware-Schnittstelle und ein Protokoll, das eine präzisere und kooperativere Energieverwaltung zwischen dem Betriebssystem und der CPU-Hardware ermöglicht. Es bietet eine standardisierte Möglichkeit für das OS, Leistungsanforderungen zu kommunizieren und Rückmeldungen von der CPU zu erhalten.
Kernpunkte
- Standard: Collaborative Processor Performance Control
- Zweck: Eine feingranulare CPU-Energieverwaltung ermöglichen
- Entwickler: AMD (implementiert in neueren AMD-Prozessoren)
- OS-Unterstützung: Linux Kernel 5.17+ via amd-pstate-Treiber
- Schnittstelle: sysfs-exponierte Steuerelemente
Features
CPPC bietet mehrere Schlüsselmöglichkeiten:
- Leistungsziele: Hardware kommuniziert optimale Leistungsziele an das OS
- Performance-Hinweise: Hardware bietet Hinweise zu effizienten Betriebspunkten
- Rückmelde-Mechanismus: Bidirektionale Kommunikation zwischen OS und Hardware
- Feinkörnige Kontrolle: Körnigere Kontrolle als traditionelle P-States
- Dynamische Anpassung: Ermöglicht Echtzeit-Anpassung basierend auf Arbeitslast-Charakteristiken
Wie es funktioniert
- Hardware-Fähigkeiten: CPPC-fähige CPUs stellen ihre Leistungscharakteristiken zur Verfügung
- OS-Abfrage: Das Betriebssystem (via amd-pstate) fragt CPPC nach verfügbaren Leistungszuständen ab
- Regulator-Bewertung: Kernel-Regulatoren (schedutil, ondemand) bewerten CPPC-Ziele und Hinweise
- Zustandsauswahl: Regulatoren wählen angepasste Leistungszustände basierend auf Arbeitslast und CPPC-Anleitung
- Hardware-Antwort: CPU passt ihre Betriebsparameter entsprechend an
Vorteile gegenüber traditionellem ACPI
| Merkmal | CPPC (amd-pstate) | ACPI (acpi-cpufreq) |
|---|---|---|
| Granularität | Feingranular | 3 P-States |
| Rückmeldung | Hardware-Hinweise und Ziele | Statische Tabellen |
| Effizienz | Optimiert für aktuelle Arbeitslast | Generisch |
| Energieeinsparung | Überlegen | Begrenzt |
| Mobiler Vorteil | Erweiterte Akkulaufzeit | Standard |
Anwendungsfälle
- Mobile Geräte: Erweiterte Akkulaufzeit durch optimierte Energieverwaltung
- Server: Bessere Energieeffizienz in Rechenzentren
- Desktops: Responsive Leistung mit reduziertem Stromverbrauch
- Gemischte Arbeitslasten: Intelligente Anpassung an wechselnde Arbeitslast-Anforderungen
Beispiele
- amd-pstate - Linux-Kernel-Treiber, der CPPC für AMD-Prozessoren implementiert
- Kernel PM Governors - CPPC-Ziele und Hinweise für Entscheidungsfindung verwenden
- Linux Kernel 5.17+ - Enthält amd-pstate-Treiber mit CPPC-Unterstützung
Verwandte Konzepte
- Energieverwaltung
- Leistungszustände (P-States)
Siehe auch
Beziehungen
- see-also: Linux Kernel
- mechanism: amd-pstate
- see-also: Kernel PM Governors