72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
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#ifndef HAKMEM_PROF_H
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#define HAKMEM_PROF_H
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#include <stdint.h>
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#include <time.h>
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// Lightweight, sampling-based profiler for hot paths (default OFF).
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// Enable via env HAKMEM_PROF=1 and optional HAKMEM_PROF_SAMPLE=N (sample every 2^N calls, default 12).
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typedef enum {
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HKP_BIGCACHE_TRY = 0,
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HKP_TINY_ALLOC,
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HKP_ACE_ALLOC, // L1 (Mid/Large) unified
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HKP_MALLOC_ALLOC,
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HKP_MMAP_ALLOC,
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// Fine-grained (sampling) categories
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HKP_TINY_BITMAP, // tiny bitmap scan
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HKP_TINY_DRAIN_LOCKED, // tiny remote drain under lock
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HKP_TINY_DRAIN_OWNER, // tiny remote drain owner
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HKP_TINY_SPILL, // tiny magazine spill under lock
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HKP_TINY_REG_LOOKUP, // tiny registry lookup
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HKP_TINY_REG_REGISTER, // tiny registry register
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HKP_POOL_REFILL, // L2 pool refill
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HKP_POOL_LOCK, // L2 pool lock wait
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HKP_L25_REFILL, // L2.5 pool refill
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HKP_L25_LOCK, // L2.5 lock wait
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HKP_COUNT
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} hkp_cat_t;
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// Compile-time instrumentation gate.
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// Set HAKMEM_PROF_STATIC=1 at compile time to include instrumentation code paths;
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// otherwise, macros become no-ops and no symbols are referenced.
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#ifndef HAKMEM_PROF_STATIC
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#define HAKMEM_PROF_STATIC 0
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#endif
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#if HAKMEM_PROF_STATIC
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void hkm_prof_init(void);
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void hkm_prof_shutdown(void);
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int hkm_prof_enabled(void);
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int hkm_prof_should_sample(void);
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void hkm_prof_record_ns(hkp_cat_t cat, uint64_t ns);
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void hkm_prof_inc(hkp_cat_t cat);
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// Helpers for scoped timing (only when sampling)
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static inline int hkm_prof_begin(struct timespec* ts) {
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if (!hkm_prof_should_sample()) return 0;
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clock_gettime(CLOCK_MONOTONIC, ts);
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return 1;
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}
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static inline void hkm_prof_end(int active, hkp_cat_t cat, struct timespec* ts) {
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if (!active) return;
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struct timespec te; clock_gettime(CLOCK_MONOTONIC, &te);
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uint64_t ns = (te.tv_sec - ts->tv_sec) * 1000000000ULL + (te.tv_nsec - ts->tv_nsec);
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hkm_prof_record_ns(cat, ns);
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}
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#else
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// Compile-time disabled: define stubs as no-ops
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#define hkm_prof_init() ((void)0)
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#define hkm_prof_shutdown() ((void)0)
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#define hkm_prof_enabled() (0)
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#define hkm_prof_should_sample() (0)
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#define hkm_prof_record_ns(cat,ns) do{}while(0)
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#define hkm_prof_inc(cat) do{}while(0)
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#define hkm_prof_begin(ts) 0
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#define hkm_prof_end(a,cat,ts) do{}while(0)
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#endif
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#endif // HAKMEM_PROF_H
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