6ac6f5ae1b
Major refactoring to improve maintainability and debugging: 1. Split hakmem_tiny_superslab.c (1521 lines) into 7 focused files: - superslab_allocate.c: SuperSlab allocation/deallocation - superslab_backend.c: Backend allocation paths (legacy, shared) - superslab_ace.c: ACE (Adaptive Cache Engine) logic - superslab_slab.c: Slab initialization and bitmap management - superslab_cache.c: LRU cache and prewarm cache management - superslab_head.c: SuperSlabHead management and expansion - superslab_stats.c: Statistics tracking and debugging 2. Created hakmem_tiny_superslab_internal.h for shared declarations 3. Added superslab_return_block() as single exit point for header writing: - All backend allocations now go through this helper - Prevents bugs where headers are forgotten in some paths - Makes future debugging easier 4. Updated Makefile for new file structure 5. Added header writing to ss_legacy_backend_box.c and ss_unified_backend_box.c (though not currently linked) Note: Header corruption bug in Larson benchmark still exists. Class 1-6 allocations go through TLS refill/carve paths, not backend. Further investigation needed. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
129 lines
5.0 KiB
C
129 lines
5.0 KiB
C
// hakmem_tiny_superslab_internal.h - Internal declarations for superslab refactor
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// Purpose: Shared declarations between superslab implementation files
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// License: MIT
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// Date: 2025-11-28
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#ifndef HAKMEM_TINY_SUPERSLAB_INTERNAL_H
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#define HAKMEM_TINY_SUPERSLAB_INTERNAL_H
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#include "hakmem_tiny_superslab.h"
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#include "box/ss_hot_cold_box.h"
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#include "hakmem_super_registry.h"
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#include "hakmem_tiny.h"
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#include "hakmem_tiny_config.h"
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#include "hakmem_shared_pool.h"
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#include "hakmem_internal.h"
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#include "tiny_region_id.h"
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#include "hakmem_tiny_integrity.h"
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#include "box/tiny_next_ptr_box.h"
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#include "box/slab_freelist_atomic.h"
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#include <sys/mman.h>
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#include <sys/resource.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <unistd.h>
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// ============================================================================
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// Global Variables (defined in superslab_stats.c)
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// ============================================================================
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extern pthread_mutex_t g_superslab_lock;
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extern uint64_t g_superslabs_allocated;
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extern uint64_t g_superslabs_freed;
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extern uint64_t g_bytes_allocated;
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extern _Atomic uint64_t g_ss_active_dec_calls;
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extern _Atomic uint64_t g_hak_tiny_free_calls;
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extern _Atomic uint64_t g_ss_remote_push_calls;
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extern _Atomic uint64_t g_free_ss_enter;
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extern _Atomic uint64_t g_free_local_box_calls;
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extern _Atomic uint64_t g_free_remote_box_calls;
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extern uint64_t g_ss_alloc_by_class[8];
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extern uint64_t g_ss_freed_by_class[8];
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extern _Atomic uint64_t g_ss_mmap_count;
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extern _Atomic uint64_t g_final_fallback_mmap_count;
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// ============================================================================
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// SuperSlabHead Management (defined in superslab_head.c)
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// ============================================================================
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extern SuperSlabHead* g_superslab_heads[TINY_NUM_CLASSES_SS];
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// ============================================================================
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// Cache System (defined in superslab_cache.c)
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// ============================================================================
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typedef struct SuperslabCacheEntry {
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struct SuperslabCacheEntry* next;
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} SuperslabCacheEntry;
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extern SuperslabCacheEntry* g_ss_cache_head[8];
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extern size_t g_ss_cache_count[8];
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extern size_t g_ss_cache_cap[8];
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extern size_t g_ss_precharge_target[8];
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extern _Atomic int g_ss_precharge_done[8];
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extern int g_ss_cache_enabled;
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extern pthread_once_t g_ss_cache_once;
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extern pthread_mutex_t g_ss_cache_lock[8];
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extern uint64_t g_ss_cache_hits[8];
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extern uint64_t g_ss_cache_misses[8];
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extern uint64_t g_ss_cache_puts[8];
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extern uint64_t g_ss_cache_drops[8];
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extern uint64_t g_ss_cache_precharged[8];
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extern uint64_t g_superslabs_reused;
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extern uint64_t g_superslabs_cached;
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// Cache functions (defined in superslab_cache.c)
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void ss_cache_global_init(void);
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void ss_cache_ensure_init(void);
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void* ss_os_acquire(uint8_t size_class, size_t ss_size, uintptr_t ss_mask, int populate);
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void ss_cache_precharge(uint8_t size_class, size_t ss_size, uintptr_t ss_mask);
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SuperslabCacheEntry* ss_cache_pop(uint8_t size_class);
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int ss_cache_push(uint8_t size_class, SuperSlab* ss);
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// ============================================================================
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// ACE (Adaptive Cache Engine) - defined in superslab_ace.c
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// ============================================================================
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extern SuperSlabACEState g_ss_ace[TINY_NUM_CLASSES_SS];
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extern int g_ss_force_lg;
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extern _Atomic int g_ss_populate_once;
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uint8_t hak_tiny_superslab_next_lg(int class_idx);
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void ace_observe_and_decide(int k);
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// ============================================================================
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// Statistics (defined in superslab_stats.c)
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// ============================================================================
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void ss_stats_os_alloc(uint8_t size_class, size_t ss_size);
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void ss_stats_cache_reuse(void);
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void ss_stats_cache_store(void);
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void log_superslab_oom_once(size_t ss_size, size_t alloc_size, int err);
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// ============================================================================
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// Slab Management (defined in superslab_slab.c)
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// ============================================================================
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// Drain remote MPSC stack into freelist (ownership already verified by caller)
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void _ss_remote_drain_to_freelist_unsafe(SuperSlab* ss, int slab_idx, TinySlabMeta* meta);
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// ============================================================================
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// Backend Allocation (defined in superslab_backend.c)
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// ============================================================================
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void* hak_tiny_alloc_superslab_backend_legacy(int class_idx);
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void* hak_tiny_alloc_superslab_backend_shared(int class_idx);
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// ============================================================================
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// SuperSlabHead Management (defined in superslab_head.c)
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// ============================================================================
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SuperSlabHead* init_superslab_head(int class_idx);
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int expand_superslab_head(SuperSlabHead* head);
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SuperSlab* find_chunk_for_ptr(void* ptr, int class_idx);
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#endif // HAKMEM_TINY_SUPERSLAB_INTERNAL_H
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