Use parallel write to celldb (ton-blockchain#1264)

* Parallel write in celldb

* Add TD_PERF_COUNTER to gc_cell and store_cell

* More error handling

* Tests for prepare_commit_async

* Install g++11 for ubuntu 20.04

---------

Co-authored-by: SpyCheese <mikle98@yandex.ru>

.github/workflows/build-ton-linux-x86-64-shared.yml

@@ -21,6 +21,12 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y build-essential git cmake ninja-build zlib1g-dev libsecp256k1-dev libmicrohttpd-dev libsodium-dev liblz4-dev libjemalloc-dev
 
+    - if: matrix.os == 'ubuntu-20.04'
+      run: |
+        sudo apt install -y manpages-dev software-properties-common
+        sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+        sudo apt update && sudo apt install gcc-11 g++-11
+
     - if: matrix.os != 'ubuntu-24.04'
       run: |
         wget https://apt.llvm.org/llvm.sh

crypto/test/test-db.cpp

@@ -61,10 +61,81 @@
 #include "openssl/digest.hpp"
 #include "vm/dict.h"
 
+#include <condition_variable>
+#include <latch>
 #include <numeric>
 #include <optional>
+#include <queue>
 
 namespace vm {
+class ThreadExecutor : public DynamicBagOfCellsDb::AsyncExecutor {
+ public:
+  explicit ThreadExecutor(size_t threads_n) {
+    for (size_t i = 0; i < threads_n; ++i) {
+      threads_.emplace_back([this]() {
+        while (true) {
+          auto task = pop_task();
+          if (!task) {
+            break;
+          }
+          CHECK(generation_.load() % 2 == 1);
+          task();
+        }
+      });
+    }
+  }
+
+  ~ThreadExecutor() override {
+    for (size_t i = 0; i < threads_.size(); ++i) {
+      push_task({});
+    }
+    for (auto &t : threads_) {
+      t.join();
+    }
+  }
+
+  void execute_async(std::function<void()> f) override {
+    push_task(std::move(f));
+  }
+
+  void execute_sync(std::function<void()> f) override {
+    auto x = generation_.load();
+    std::scoped_lock lock(sync_mutex_);
+    CHECK(x == generation_);
+    CHECK(generation_.load() % 2 == 1);
+    f();
+    CHECK(generation_.load() % 2 == 1);
+  }
+  void inc_generation() {
+    generation_.fetch_add(1);
+  }
+
+ private:
+  std::atomic<size_t> generation_{0};
+  std::queue<std::pair<std::function<void()>, size_t>> queue_;
+  std::mutex queue_mutex_;
+  std::condition_variable cv_;
+  std::mutex sync_mutex_;
+  std::vector<td::thread> threads_;
+
+  std::function<void()> pop_task() {
+    std::unique_lock lock(queue_mutex_);
+    cv_.wait(lock, [&] { return !queue_.empty(); });
+    CHECK(!queue_.empty());
+    auto task = std::move(queue_.front());
+    queue_.pop();
+    CHECK(task.second == generation_);
+    return task.first;
+  }
+
+  void push_task(std::function<void()> task) {
+    {
+      std::scoped_lock lock(queue_mutex_);
+      queue_.emplace(std::move(task), generation_.load());
+    }
+    cv_.notify_one();
+  }
+};
 
 std::vector<int> do_get_serialization_modes() {
   std::vector<int> res;
@@ -890,25 +961,91 @@ TEST(TonDb, InMemoryDynamicBocSimple) {
   boc = DynamicBagOfCellsDb::create_in_memory(kv.get(), {});
 }
 
-void test_dynamic_boc(std::optional<DynamicBagOfCellsDb::CreateInMemoryOptions> o_in_memory) {
+int VERBOSITY_NAME(boc) = VERBOSITY_NAME(DEBUG) + 10;
+
+struct BocOptions {
+  std::shared_ptr<ThreadExecutor> async_executor;
+  std::optional<DynamicBagOfCellsDb::CreateInMemoryOptions> o_in_memory;
+  td::uint64 seed{123};
+
+  auto create_dboc(td::KeyValueReader *kv, std::optional<td::int64> o_root_n) {
+    if (o_in_memory) {
+      auto res = DynamicBagOfCellsDb::create_in_memory(kv, *o_in_memory);
+      auto stats = res->get_stats().move_as_ok();
+      if (o_root_n) {
+        ASSERT_EQ(*o_root_n, stats.roots_total_count);
+      }
+      VLOG(boc) << "reset roots_n=" << stats.roots_total_count << " cells_n=" << stats.cells_total_count;
+      return res;
+    }
+    return DynamicBagOfCellsDb::create();
+  };
+  void prepare_commit(DynamicBagOfCellsDb &dboc) {
+    if (async_executor) {
+      async_executor->inc_generation();
+      std::latch latch(1);
+      td::Result<td::Unit> res;
+      async_executor->execute_sync([&] {
+        dboc.prepare_commit_async(async_executor, [&](auto r) {
+          res = std::move(r);
+          latch.count_down();
+        });
+      });
+      latch.wait();
+      async_executor->execute_sync([&] {});
+      async_executor->inc_generation();
+    } else {
+      dboc.prepare_commit();
+    }
+  }
+};
+
+template <class F>
+void with_all_boc_options(F &&f, size_t tests_n = 500) {
+  LOG(INFO) << "Test dynamic boc";
+  auto counter = [] { return td::NamedThreadSafeCounter::get_default().get_counter("DataCell").sum(); };
+  auto run = [&](BocOptions options) {
+    LOG(INFO) << "\t" << (options.o_in_memory ? "in memory" : "on disk") << (options.async_executor ? " async" : "");
+    if (options.o_in_memory) {
+      LOG(INFO) << "\t\tuse_arena=" << options.o_in_memory->use_arena
+                << " less_memory=" << options.o_in_memory->use_less_memory_during_creation;
+    }
+    for (td::uint32 i = 0; i < tests_n; i++) {
+      auto before = counter();
+      options.seed = i == 0 ? 123 : i;
+      f(options);
+      auto after = counter();
+      LOG_CHECK((options.o_in_memory && options.o_in_memory->use_arena) || before == after)
+          << before << " vs " << after;
+    }
+  };
+  run({.async_executor = std::make_shared<ThreadExecutor>(4)});
+  run({});
+  for (auto use_arena : {false, true}) {
+    for (auto less_memory : {false, true}) {
+      run({.o_in_memory =
+               DynamicBagOfCellsDb::CreateInMemoryOptions{.extra_threads = std::thread::hardware_concurrency(),
+                                                          .verbose = false,
+                                                          .use_arena = use_arena,
+                                                          .use_less_memory_during_creation = less_memory}});
+    }
+  }
+}
+
+void test_dynamic_boc(BocOptions options) {
   auto counter = [] { return td::NamedThreadSafeCounter::get_default().get_counter("DataCell").sum(); };
   auto before = counter();
   SCOPE_EXIT {
-    LOG_CHECK((o_in_memory && o_in_memory->use_arena) || before == counter()) << before << " vs " << counter();
-    ;
+    LOG_CHECK((options.o_in_memory && options.o_in_memory->use_arena) || before == counter())
+        << before << " vs " << counter();
   };
-  td::Random::Xorshift128plus rnd{123};
+  td::Random::Xorshift128plus rnd{options.seed};
   std::string old_root_hash;
   std::string old_root_serialization;
   auto kv = std::make_shared<td::MemoryKeyValue>();
   auto create_dboc = [&]() {
-    if (o_in_memory) {
-      auto res = DynamicBagOfCellsDb::create_in_memory(kv.get(), *o_in_memory);
-      auto roots_n = old_root_hash.empty() ? 0 : 1;
-      ASSERT_EQ(roots_n, res->get_stats().ok().roots_total_count);
-      return res;
-    }
-    return DynamicBagOfCellsDb::create();
+    auto roots_n = old_root_hash.empty() ? 0 : 1;
+    return options.create_dboc(kv.get(), roots_n);
   };
   auto dboc = create_dboc();
   dboc->set_loader(std::make_unique<CellLoader>(kv));
@@ -947,51 +1084,28 @@ void test_dynamic_boc(std::optional<DynamicBagOfCellsDb::CreateInMemoryOptions>
   ASSERT_EQ(0u, kv->count("").ok());
 }
 
-template <class F>
-void with_all_boc_options(F &&f) {
-  LOG(INFO) << "Test dynamic boc";
-  LOG(INFO) << "\ton disk";
-  f({});
-  for (auto use_arena : {false, true}) {
-    for (auto less_memory : {false, true}) {
-      LOG(INFO) << "\tuse_arena=" << use_arena << " less_memory=" << less_memory;
-      f(DynamicBagOfCellsDb::CreateInMemoryOptions{.extra_threads = std::thread::hardware_concurrency(),
-                                                   .verbose = false,
-                                                   .use_arena = use_arena,
-                                                   .use_less_memory_during_creation = less_memory});
-    }
-  }
-}
 TEST(TonDb, DynamicBoc) {
-  with_all_boc_options(test_dynamic_boc);
+  with_all_boc_options(test_dynamic_boc, 1);
 };
 
-void test_dynamic_boc2(std::optional<DynamicBagOfCellsDb::CreateInMemoryOptions> o_in_memory) {
-  int VERBOSITY_NAME(boc) = VERBOSITY_NAME(DEBUG) + 10;
-  td::Random::Xorshift128plus rnd{123};
-  int total_roots = 10000;
-  int max_roots = 20;
+void test_dynamic_boc2(BocOptions options) {
+  td::Random::Xorshift128plus rnd{options.seed};
+
+  int total_roots = rnd.fast(1, !rnd.fast(0, 10) * 100 + 10);
+  int max_roots = rnd.fast(1, 20);
   int last_commit_at = 0;
   int first_root_id = 0;
   int last_root_id = 0;
   auto kv = std::make_shared<td::MemoryKeyValue>();
-  auto create_dboc = [&](td::int64 root_n) {
-    if (o_in_memory) {
-      auto res = DynamicBagOfCellsDb::create_in_memory(kv.get(), *o_in_memory);
-      auto stats = res->get_stats().move_as_ok();
-      ASSERT_EQ(root_n, stats.roots_total_count);
-      VLOG(boc) << "reset roots_n=" << stats.roots_total_count << " cells_n=" << stats.cells_total_count;
-      return res;
-    }
-    return DynamicBagOfCellsDb::create();
-  };
+  auto create_dboc = [&](td::int64 root_n) { return options.create_dboc(kv.get(), root_n); };
   auto dboc = create_dboc(0);
   dboc->set_loader(std::make_unique<CellLoader>(kv));
 
   auto counter = [] { return td::NamedThreadSafeCounter::get_default().get_counter("DataCell").sum(); };
   auto before = counter();
-  SCOPE_EXIT {
-    LOG_CHECK((o_in_memory && o_in_memory->use_arena) || before == counter()) << before << " vs " << counter();
+  SCOPE_EXIT{
+      // LOG_CHECK((options.o_in_memory && options.o_in_memory->use_arena) || before == counter())
+      //     << before << " vs " << counter();
   };
 
   std::vector<Ref<Cell>> roots(max_roots);
@@ -1009,7 +1123,7 @@ void test_dynamic_boc2(std::optional<DynamicBagOfCellsDb::CreateInMemoryOptions>
     if (from_root.is_null()) {
       VLOG(boc) << "  from db";
       auto from_root_hash = root_hashes[root_id % max_roots];
-      if (o_in_memory && (rnd() % 2 == 0)) {
+      if (rnd() % 2 == 0) {
         from_root = dboc->load_root(from_root_hash).move_as_ok();
       } else {
         from_root = dboc->load_cell(from_root_hash).move_as_ok();
@@ -1041,7 +1155,8 @@ void test_dynamic_boc2(std::optional<DynamicBagOfCellsDb::CreateInMemoryOptions>
 
   auto commit = [&] {
     VLOG(boc) << "commit";
-    dboc->prepare_commit();
+    //rnd.fast(0, 1);
+    options.prepare_commit(*dboc);
     {
       CellStorer cell_storer(*kv);
       dboc->commit(cell_storer);
@@ -2147,18 +2262,18 @@ TEST(TonDb, BocRespectsUsageCell) {
   ASSERT_STREQ(serialization, serialization_of_virtualized_cell);
 }
 
-void test_dynamic_boc_respectes_usage_cell(std::optional<vm::DynamicBagOfCellsDb::CreateInMemoryOptions> o_in_memory) {
-  td::Random::Xorshift128plus rnd(123);
+void test_dynamic_boc_respectes_usage_cell(vm::BocOptions options) {
+  td::Random::Xorshift128plus rnd(options.seed);
   auto cell = vm::gen_random_cell(20, rnd, true);
   auto usage_tree = std::make_shared<vm::CellUsageTree>();
   auto usage_cell = vm::UsageCell::create(cell, usage_tree->root_ptr());
 
   auto kv = std::make_shared<td::MemoryKeyValue>();
-  auto dboc = o_in_memory ? vm::DynamicBagOfCellsDb::create_in_memory(kv.get(), *o_in_memory)
-                          : vm::DynamicBagOfCellsDb::create();
+  auto dboc = options.create_dboc(kv.get(), {});
   dboc->set_loader(std::make_unique<vm::CellLoader>(kv));
   dboc->inc(usage_cell);
   {
+    options.prepare_commit(*dboc);
     vm::CellStorer cell_storer(*kv);
     dboc->commit(cell_storer);
   }
@@ -2171,7 +2286,7 @@ void test_dynamic_boc_respectes_usage_cell(std::optional<vm::DynamicBagOfCellsDb
 }
 
 TEST(TonDb, DynamicBocRespectsUsageCell) {
-  vm::with_all_boc_options(test_dynamic_boc_respectes_usage_cell);
+  vm::with_all_boc_options(test_dynamic_boc_respectes_usage_cell, 20);
 }
 
 TEST(TonDb, LargeBocSerializer) {

crypto/vm/db/CellHashTable.h

@@ -43,7 +43,7 @@ class CellHashTable {
   template <class F>
   void for_each(F &&f) {
     for (auto &info : set_) {
-      f(info);
+      f(const_cast<InfoT &>(info));
     }
   }
   template <class F>

crypto/vm/db/CellStorage.cpp

@@ -184,6 +184,24 @@ td::Result<CellLoader::LoadResult> CellLoader::load(td::Slice hash, td::Slice va
   return res;
 }
 
+td::Result<CellLoader::LoadResult> CellLoader::load_refcnt(td::Slice hash) {
+  LoadResult res;
+  std::string serialized;
+  TRY_RESULT(get_status, reader_->get(hash, serialized));
+  if (get_status != KeyValue::GetStatus::Ok) {
+    DCHECK(get_status == KeyValue::GetStatus::NotFound);
+    return res;
+  }
+  res.status = LoadResult::Ok;
+  td::TlParser parser(serialized);
+  td::parse(res.refcnt_, parser);
+  if (res.refcnt_ == -1) {
+    parse(res.refcnt_, parser);
+  }
+  TRY_STATUS(parser.get_status());
+  return res;
+}
+
 CellStorer::CellStorer(KeyValue &kv) : kv_(kv) {
 }
 

crypto/vm/db/CellStorage.h

@@ -50,6 +50,7 @@ class CellLoader {
   CellLoader(std::shared_ptr<KeyValueReader> reader, std::function<void(const LoadResult &)> on_load_callback = {});
   td::Result<LoadResult> load(td::Slice hash, bool need_data, ExtCellCreator &ext_cell_creator);
   static td::Result<LoadResult> load(td::Slice hash, td::Slice value, bool need_data, ExtCellCreator &ext_cell_creator);
+  td::Result<LoadResult> load_refcnt(td::Slice hash);  // This only loads refcnt_, cell_ == null
 
  private:
   std::shared_ptr<KeyValueReader> reader_;