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Metric for number of live bytes in the pool allocator #51151

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merged 1 commit into from
Sep 3, 2023
Merged

Metric for number of live bytes in the pool allocator #51151

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8 changes: 8 additions & 0 deletions src/gc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -753,6 +753,7 @@ int prev_sweep_full = 1;
int under_pressure = 0;

// Full collection heuristics
static int64_t pool_live_bytes = 0;
static int64_t live_bytes = 0;
static int64_t promoted_bytes = 0;
static int64_t last_live_bytes = 0; // live_bytes at last collection
Expand Down Expand Up @@ -1530,6 +1531,7 @@ static jl_taggedvalue_t **gc_sweep_page(jl_gc_pool_t *p, jl_gc_pagemeta_t **allo
}
gc_time_count_page(freedall, pg_skpd);
gc_num.freed += (nfree - old_nfree) * osize;
pool_live_bytes += GC_PAGE_SZ - GC_PAGE_OFFSET - nfree * osize;
return pfl;
}

Expand Down Expand Up @@ -3108,6 +3110,11 @@ JL_DLLEXPORT int64_t jl_gc_sync_total_bytes(int64_t offset) JL_NOTSAFEPOINT
return newtb - oldtb;
}

JL_DLLEXPORT int64_t jl_gc_pool_live_bytes(void)
{
return pool_live_bytes;
}

JL_DLLEXPORT int64_t jl_gc_live_bytes(void)
{
return live_bytes;
Expand Down Expand Up @@ -3269,6 +3276,7 @@ static int _jl_gc_collect(jl_ptls_t ptls, jl_gc_collection_t collection)
promoted_bytes = 0;
}
scanned_bytes = 0;
pool_live_bytes = 0;
// 6. start sweeping
uint64_t start_sweep_time = jl_hrtime();
JL_PROBE_GC_SWEEP_BEGIN(sweep_full);
Expand Down
1 change: 1 addition & 0 deletions src/jl_exported_funcs.inc
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Original file line number Diff line number Diff line change
Expand Up @@ -176,6 +176,7 @@
XX(jl_gc_internal_obj_base_ptr) \
XX(jl_gc_is_enabled) \
XX(jl_gc_is_in_finalizer) \
XX(jl_gc_pool_live_bytes) \
XX(jl_gc_live_bytes) \
XX(jl_gc_managed_malloc) \
XX(jl_gc_managed_realloc) \
Expand Down