LCOV - code coverage report
Current view: top level - src/mem - memory_tracker.cpp (source / functions) Coverage Total Hit
Test: HPActor Coverage Lines: 90.0 % 50 45
Test Date: 2026-05-20 02:24:49 Functions: 88.9 % 9 8
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : // Copyright 2026 HPActor Contributors
       2                 :             : //
       3                 :             : // Licensed under the Apache License, Version 2.0 (the "License");
       4                 :             : // you may not use this file except in compliance with the License.
       5                 :             : // You may obtain a copy of the License at
       6                 :             : //
       7                 :             : //     http://www.apache.org/licenses/LICENSE-2.0
       8                 :             : //
       9                 :             : // Unless required by applicable law or agreed to in writing, software
      10                 :             : // distributed under the License is distributed on an "AS IS" BASIS,
      11                 :             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12                 :             : // See the License for the specific language governing permissions and
      13                 :             : // limitations under the License.
      14                 :             : 
      15                 :             : #include <hpactor/mem/memory_tracker.hpp>
      16                 :             : 
      17                 :             : namespace hpactor::mem {
      18                 :             : 
      19                 :           1 : MemoryTracker& MemoryTracker::instance() {
      20                 :           1 :     static MemoryTracker mt;
      21                 :           1 :     return mt;
      22                 :             : }
      23                 :             : 
      24                 :           1 : MemoryTracker::MemoryTracker()
      25                 :     1000001 :     : stats_(new ActorMemoryStats[kMaxTrackedActors]),
      26                 :           1 :       capacity_(kMaxTrackedActors) {}
      27                 :             : 
      28                 :        4011 : size_t MemoryTracker::index_for(ActorId actor) const noexcept {
      29                 :        4011 :     return static_cast<size_t>(actor.value() % kMaxTrackedActors);
      30                 :             : }
      31                 :             : 
      32                 :        4003 : bool MemoryTracker::record_alloc(ActorId actor, size_t bytes) noexcept {
      33                 :        4003 :     size_t idx = index_for(actor);
      34                 :        4003 :     if (idx >= capacity_) return false;
      35                 :             : 
      36                 :        4003 :     auto& s = stats_[idx];
      37                 :             : 
      38                 :        4003 :     uint64_t prev = __atomic_fetch_add(&s.current_bytes, bytes, __ATOMIC_RELAXED);
      39                 :        4003 :     uint64_t curr = prev + bytes;
      40                 :             : 
      41                 :             :     // Update peak lazily via CAS
      42                 :        4003 :     uint64_t peak = __atomic_load_n(&s.peak_bytes, __ATOMIC_RELAXED);
      43                 :        4003 :     while (curr > peak) {
      44                 :        4003 :         if (__atomic_compare_exchange_n(&s.peak_bytes, &peak, curr,
      45                 :             :                 /*weak=*/false, __ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
      46                 :        4003 :             break;
      47                 :             :         }
      48                 :             :     }
      49                 :             : 
      50                 :        4003 :     __atomic_fetch_add(&s.alloc_count, 1, __ATOMIC_RELAXED);
      51                 :        4003 :     return true;
      52                 :             : }
      53                 :             : 
      54                 :           1 : void MemoryTracker::record_free(ActorId actor, size_t bytes) noexcept {
      55                 :           1 :     size_t idx = index_for(actor);
      56                 :           1 :     if (idx >= capacity_) return;
      57                 :             : 
      58                 :           1 :     auto& s = stats_[idx];
      59                 :           1 :     __atomic_fetch_sub(&s.current_bytes, bytes, __ATOMIC_RELAXED);
      60                 :           1 :     __atomic_fetch_add(&s.free_count, 1, __ATOMIC_RELAXED);
      61                 :             : }
      62                 :             : 
      63                 :           7 : void MemoryTracker::snapshot(ActorId actor, ActorMemoryStats& out) const noexcept {
      64                 :           7 :     size_t idx = index_for(actor);
      65                 :           7 :     if (idx >= capacity_) return;
      66                 :             : 
      67                 :           7 :     const auto& s = stats_[idx];
      68                 :           7 :     out.current_bytes = __atomic_load_n(&s.current_bytes, __ATOMIC_RELAXED);
      69                 :           7 :     out.peak_bytes    = __atomic_load_n(&s.peak_bytes, __ATOMIC_RELAXED);
      70                 :           7 :     out.alloc_count   = __atomic_load_n(&s.alloc_count, __ATOMIC_RELAXED);
      71                 :           7 :     out.free_count    = __atomic_load_n(&s.free_count, __ATOMIC_RELAXED);
      72                 :           7 :     out.last_alloc_ns = __atomic_load_n(&s.last_alloc_ns, __ATOMIC_RELAXED);
      73                 :             : }
      74                 :             : 
      75                 :           1 : uint64_t MemoryTracker::total_active_bytes() const noexcept {
      76                 :           1 :     uint64_t total = 0;
      77                 :     1000001 :     for (size_t i = 0; i < capacity_; ++i) {
      78                 :     1000000 :         total += __atomic_load_n(&stats_[i].current_bytes, __ATOMIC_RELAXED);
      79                 :             :     }
      80                 :           1 :     return total;
      81                 :             : }
      82                 :             : 
      83                 :           0 : uint64_t MemoryTracker::total_peak_bytes() const noexcept {
      84                 :           0 :     uint64_t total = 0;
      85                 :           0 :     for (size_t i = 0; i < capacity_; ++i) {
      86                 :           0 :         total += __atomic_load_n(&stats_[i].peak_bytes, __ATOMIC_RELAXED);
      87                 :             :     }
      88                 :           0 :     return total;
      89                 :             : }
      90                 :             : 
      91                 :           1 : uint64_t MemoryTracker::total_alloc_count() const noexcept {
      92                 :           1 :     uint64_t total = 0;
      93                 :     1000001 :     for (size_t i = 0; i < capacity_; ++i) {
      94                 :     1000000 :         total += __atomic_load_n(&stats_[i].alloc_count, __ATOMIC_RELAXED);
      95                 :             :     }
      96                 :           1 :     return total;
      97                 :             : }
      98                 :             : 
      99                 :             : } // namespace hpactor::mem
        

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