d54893ea1d
Step 2 & 3 Complete: - A/B test (Mixed 10-run): STATIC_ROUTE=0 (38.91M) → =1 (39.77M) = +2.20% avg - Median gain: +1.98% - Result: ✅ GO (exceeds +1.0% threshold) - Decision: ✅ ADOPT into MIXED_TINYV3_C7_SAFE preset - bench_profile.h line 77: HAKMEM_TINY_STATIC_ROUTE=1 default - Learner auto-disables static route when HAKMEM_SMALL_LEARNER_V7_ENABLED=1 Implementation Summary: - core/box/tiny_static_route_box.{h,c}: Research box (Step 1A) - core/front/malloc_tiny_fast.h: Route lookup integration (Step 1B, lines 249-256) - core/bench_profile.h: Bench sync + preset adoption Cumulative Phase 2-3 Gains: - B3 (Routing shape): +2.89% - B4 (Wrapper split): +1.47% - C3 (Static routing): +2.20% - Total: ~6.8% (35.2M → ~39.8M ops/s) Next: Phase 3 C1 (TLS Prefetch, expected +2-4%) 🤖 Generated with Claude Code Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
// tiny_static_route_box.h - Static routing table for policy_snapshot bypass (Phase 3 C3)
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// Eliminates per-malloc policy_snapshot + learner evaluation overhead
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// ENV gate: HAKMEM_TINY_STATIC_ROUTE=0/1 (default 0)
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#pragma once
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#include <stdatomic.h>
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#include "smallobject_policy_v7_box.h"
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typedef struct {
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// 0: uninit/disabled, -1: initializing, 1: ready
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atomic_int inited;
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SmallRouteKind route_kind[8]; // C0-C7 static route (determined at init, no learner update)
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} TinyStaticRoute;
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extern TinyStaticRoute g_tiny_static_route;
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// Hot-path helper: true when static route table is ready (enabled + initialized).
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static inline int tiny_static_route_ready_fast(void) {
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return atomic_load_explicit(&g_tiny_static_route.inited, memory_order_acquire) == 1;
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}
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// Hot-path helper: fetch route kind when tiny_static_route_ready_fast()==true.
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static inline SmallRouteKind tiny_static_route_get_kind_fast(int class_idx) {
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return g_tiny_static_route.route_kind[(unsigned)class_idx & 7u];
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}
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// Initialize static route table (called once, at library load time)
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// Returns 1 if static routing is enabled and initialized, 0 otherwise
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int tiny_static_route_init_once(void);
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// Get static route for class_idx.
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// Returns SMALL_ROUTE_LEGACY when disabled/uninitialized/invalid (safe fallback).
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SmallRouteKind tiny_static_route_get_kind(int class_idx);
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// Refresh from ENV (for bench_apply_profile() sync)
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void tiny_static_route_refresh_from_env(void);
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// Check if static routing is enabled (cached ENV value)
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int tiny_static_route_enabled(void);
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