System breakdown

Inside vLLM PagedAttention & Chunked Prefill Engine

An evidence-audited, 20-diagram interactive system breakdown tracing vLLM BlockAllocator virtual KV cache memory block management, PagedAttention CUDA kernel non-contiguous VRAM lookup, Chunked Prefill prompt co-scheduling, CUDA Graph decode execution, and Grouped-Query Attention (GQA) memory bandwidth optimization.

28 min read Verified 2026-07-21 1 primary sources
Canonical System Breakdown
vLLM PagedAttention & Chunked Prefill Engine System Breakdown
RELEASE v0.5.0
1 CHAPTERS · 3 NODES · 2 EDGES
Ingress Security
HMAC SHA256
Constant-time verify (<50ms)
Async Queueing
Sidekiq + Redis
Multi-queue priority isolation
Real-time Fanout
ActionCable Pub/Sub
Redis backplane state broadcast
AI Action Engine
ActionService LLM
Streaming copilot replies (SSE)
Core Stack:Rails 7.1•Sidekiq 7•Redis 7.2•PostgreSQL 16•Vue.js 3
5 Verified Architectural Claims
Archify Interactive Mapv2.16.0

Inside vLLM PagedAttention & Chunked Prefill Engine — Archify Interactive System Map

Hotkeys:R Route ProbeL Role LensP Play StoryS Visual StyleT ThemeF Stage